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Synthesis and Design of Distillation Columns for Wide-Boiling Binary Mixtures with Vapor Recompression Heat Pumps
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作者 Shi Li 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第4期127-138,共12页
The vapor recompression heat pump(VRHP) distillation technology offers significant improvements in energy efficiency for distillation systems with small temperature differences between the top and bottom of the column... The vapor recompression heat pump(VRHP) distillation technology offers significant improvements in energy efficiency for distillation systems with small temperature differences between the top and bottom of the column. However, the separation of wide-boiling binary mixtures leads to substantial temperature differences between the top and bottom of the column. This limits the applicability of conventional VRHP due to high capital costs and strict performance requirements of the compressor. To overcome these challenges and to accommodate compressor operating conditions, a novel synthesis and design method is introduced to integrate VRHPs with wide-boiling binary mixture distillation columns(WBMDCs). This method enables quick determination of an initial configuration for the integrated WBMDC-VRHP system and helps identify the optimum configuration with the minimum total annual cost. Two examples, namely the separation of benzene/toluene and isopropanol/chlorobenzene, are employed to derive optimum configurations of the WBMDC-VRHP and compare them with the WBMDC. A systematic comparison between the WBMDC-VRHP and WBMDC demonstrates the superior steady-state performance and economic efficiency of the WBMDC-VRHP. 展开更多
关键词 vapor recompression heat pump wide-boiling binary mixtures distillation column energy saving synthesis and design
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Density, Viscosity, and Excess Properties for Binary Mixture of Diethylene Glycol Monoethyl Ether + Water from 293.15 to 333.15 K at Atmospheric Pressure 被引量:5
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作者 李新学 徐国民 +1 位作者 王彦伟 胡一江 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第6期1009-1013,共5页
Densities and viscosities were measured as a function of composition for binary liquid mixture of diethylerie glycol monoethyl ether [CH3CH2O(CH2)2O(CH2)2OH] + water from 293.15 to 333.15 K at atmospheric pressur... Densities and viscosities were measured as a function of composition for binary liquid mixture of diethylerie glycol monoethyl ether [CH3CH2O(CH2)2O(CH2)2OH] + water from 293.15 to 333.15 K at atmospheric pressure, with a capillary pycnometer and Ubbelohde capillary viscometer respectively. From the experimental data, the excess molar volume V^E, viscosity deviation △η, and the excess energy of activation for viscous flow △G^*E were calculated. These data were correlated by the Redlich-Kister type equations to obtain the coefficients and standard deviations. The results showed a strong molecular interaction between diethylene glycol monoethyl ether and water. 展开更多
关键词 DENSITY VISCOSITY diethylene glycol monoethyl ether binary mixture excess molar volume viscosity deviation
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Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles 被引量:2
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作者 Quanhong Zhu Hongzhong Li +1 位作者 Qingshan Zhu Qingshan Huang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第6期1412-1422,共11页
For the magnetized fluidized bed(MFB)with the binary mixture of Geldart-B magnetizable and nonmagnetizable particles,the magnetically induced segregation between these two kinds of particles occurs at high magnetic fi... For the magnetized fluidized bed(MFB)with the binary mixture of Geldart-B magnetizable and nonmagnetizable particles,the magnetically induced segregation between these two kinds of particles occurs at high magnetic field intensities(H),leading to the deterioration of the fluidization quality.The critical intensity(H_(ms))above which such segregation commences varies with the gas velocity(U_g).This work focuses on establishing a segregation model to theoretically derive the H_(ms)–U_g relationship.In a magnetic field,the magnetizable particles form agglomerates.The magnetically induced segregation in essence refers to the size segregation of the binary mixture of agglomerates and nonmagnetizable particles.Consequently,the segregation model was established in two steps:first,the size of agglomerates(d_A)was calculated by the force balance model;then,the H_(ms)–U_g relationship was obtained by substituting the expression of d_Ainto the basic size segregation model for binary mixtures.As per the force balance model,the cohesive and collision forces were 1_2 orders of magnitude greater than the other forces exerted on the agglomerates.Therefore,the balance between these two forces largely determined d_A.The calculated d_A increased with increasing H and decreasing U_g,agreeing qualitatively with the experimental observation.The calculated H_(ms)–U_ g relationship agreed reasonably with the experimental data,indicating that the present segregation model could predict well the segregation behavior in the MFB with the binary mixture. 展开更多
关键词 Magnetized fluidized bed binary mixture SEGREGATION Model AGGLOMERATE Force balance
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First Binary Mixture Ionic Liquids Containing EMIMBr and IM 被引量:2
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作者 Li Yi DAI Chun Yan HUA +2 位作者 Sheng Rong YE Yong Kui SHAN Ming Yuan HE 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第6期634-636,共3页
A new series of binary mixture ionic liquids comprising 1-ethyl-3-methylimidozalium bromide (EMIMBr) and imidazole (IM) have been synthesized. The melting points of the ionic liquids vary with the different content o... A new series of binary mixture ionic liquids comprising 1-ethyl-3-methylimidozalium bromide (EMIMBr) and imidazole (IM) have been synthesized. The melting points of the ionic liquids vary with the different content of IM while they still keep satisfactory conductivity and viscosity. According to the analysis of its phase diagram, the eutectic point is about 16.5C with the mass percentage of IM 29%. 展开更多
关键词 Ionic liquid binary mixture phase diagram.
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A smart simple spectrophotometric method for simultaneous determination of binary mixtures 被引量:2
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作者 Eman S.Elzanfaly Ahmed S.Saad Abd Elaziz B.Abd Elaleem 《Journal of Pharmaceutical Analysis》 CAS 2012年第5期382-385,共4页
A new simple spectrophotometric method was developed for the simultaneous determination of drugs with interfering spectra in binary mixtures without previous separation. The new method is based on a simple modificatio... A new simple spectrophotometric method was developed for the simultaneous determination of drugs with interfering spectra in binary mixtures without previous separation. The new method is based on a simple modification for the ratio subtraction method. This modification enabled wider range of application. The proposed ratio difference method was applied for the determination of brimonidine and timolol in laboratory prepared mixtures with mean percentage recoveries 100.40±2.29 and 101.23± 1.30 respectively, and in their pharmaceutical formulation with mean percentage recoveries 101.08±0.44 and 100.66±0.52 respectively. The suggested ratio difference method was validated according to USP guidelines and can be applied for routine aualitv control testing. 展开更多
关键词 Spectrophotometry Ratio difference binary mixtures BRIMONIDINE TIMOLOL
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Phase behaviors in a binary mixture of diblock copolymers confined between two parallel walls 被引量:1
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作者 潘俊星 张进军 +2 位作者 王宝凤 武海顺 孙敏娜 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第2期372-380,共9页
The phase behaviors in a binary mixture of diblock copolymers confined between two parallel walls are investigated by using a cell dynamics simulation of the time-dependent Ginzburg-Landau theory.The morphological dep... The phase behaviors in a binary mixture of diblock copolymers confined between two parallel walls are investigated by using a cell dynamics simulation of the time-dependent Ginzburg-Landau theory.The morphological dependence of the wall-block interaction and the distance between walls(confinement degree) has been systematically studied,and the effect of repulsive interactions between different monomers is also discussed.It is interesting that multiple novel morphological transitions are observed by changing these factors,and various multilayered sandwich structures are formed in the mixture.Furthermore,the parametric dependence and physical reasons for the microdomain growth and orientational order transitions are discussed.From the simulation,we find that much richer morphologies can form in a binary mixture of diblock copolymers than those in a pure diblock copolymer.Our results provide an insight into the phase behaviors under parallel wall confinement and may provide guidance for experimentalists.This model system can also give a simple way to realize orientational order transition in soft materials through confinement. 展开更多
关键词 parallel walls confinement phase behavior binary mixture diblock copolymer
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Phase separation and super diffusion of binary mixtures of active and passive particles 被引量:1
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作者 Yan Wang Zhuanglin Shen +2 位作者 Yiqi Xia Guoqiang Feng Wende Tian 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第5期26-31,共6页
Computer simulations were performed to study the dense mixtures of passive particles and active particles in two dimensions.Two systems with different kinds of passive particles(e.g.,spherical particles and rod-like p... Computer simulations were performed to study the dense mixtures of passive particles and active particles in two dimensions.Two systems with different kinds of passive particles(e.g.,spherical particles and rod-like particles)were considered.At small active forces,the high-density and low-density regions emerge in both systems,indicating a phase separation.At higher active forces,the systems return to a homogeneous state with large fluctuation of particle area in contrast with the thermo-equilibrium state.Structurally,the rod-like particles accumulate loosely due to the shape anisotropy compared with the spherical particles at the high-density region.Moreover,there exists a positive correlation between Voronoi area and velocity of the particles.Additionally,a small number of active particles capably give rise to super-diffusion of passive particles in both systems when the self-propelled force is turned on. 展开更多
关键词 phase separation super diffusion active particles binary mixtures
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Phase behaviors of binary mixtures composed of electron-rich and electron-poor triphenylene discotic liquid crystals 被引量:1
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作者 安玲玲 景敏 +3 位作者 肖波 白小燕 曾庆祷 赵可清 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期143-148,共6页
Disk-like liquid crystals(DLCs) can self-assemble to ordered columnar mesophases and are intriguing onedimensional organic semiconductors with high charge carrier mobility.To improve their applicable property of mes... Disk-like liquid crystals(DLCs) can self-assemble to ordered columnar mesophases and are intriguing onedimensional organic semiconductors with high charge carrier mobility.To improve their applicable property of mesomorphic temperature ranges,we exploit the binary mixtures of electronic donor-acceptor DLC materials.The electron-rich2,3,6,7,10,11-hexakis(alkoxy)triphenylenes(C4,C6,C8,C10,C12) and an electron-deficient tetrapentyl triphenylene-2,3,6,10-tetracarboxylate have been prepared and their binary mixtures have been investigated.The mesomorphism of the1:1(molar ratio) mixtures has been characterized by polarizing optical microscopy(POM),differential scanning calorimetry(DSC),and small angel x-ray scattering(SAXS).The self-assembled monolayer structure of a discogen on a solid-liquid interface has been imaged by the high resolution scanning tunneling microscopy(STM).The match of peripheral chain length has important influence on the mesomorphism of the binary mixtures. 展开更多
关键词 binary mixtures discotic liquid crystals triphenylene mesomorphism
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Swelling Performance Studies of Acrylamide/Potassium 3-Sulfopropyl Methacrylate/Sodium Alginate/Bentonite Biohybrid Sorbent Hydrogels in Binary Mixtures of Water-Solvent 被引量:2
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作者 Erdener Karadag Z.Deniz Kasim Oztürk +2 位作者 Ö mer Baris Uzüm Semiha Kundakci 《Journal of Encapsulation and Adsorption Sciences》 2019年第1期35-61,共27页
In this study, it was to investigate the swelling performance of novel biohybrid composite hydrogel sorbents containing acrylamide/potassium 3-sulfopropyl methacrylate/sodium alginate/bentonite in water and binary mix... In this study, it was to investigate the swelling performance of novel biohybrid composite hydrogel sorbents containing acrylamide/potassium 3-sulfopropyl methacrylate/sodium alginate/bentonite in water and binary mixtures of water-solvent. Novel hydrogels were synthesized with free radical solution polymerization by using ammonium persulfate/N,N,N’,N’-tetramethylethylenediamine as redox initiating pair in presence of poly(ethylene glycol) diacrylate as crosslinker. Swelling experiments were performed in water and binary mixtures of water-solvent (acetone, methanol and tetrahydrofuran) at 25°C, gravimetrically. Some swelling and diffusion properties of the hydrogels were calculated and they were discussed for the biohybrid/hybrid hydrogel systems prepared under various formulations. It has been seen the lower equilibrium percentage swelling ratio values (62% - 124%) in all solvent compositions in comparison with the equilibrium percentage swelling ratio values in water (718% - 2055%). Consequently, the hydrogel systems developed in this study could serve as a potential device for water and water-solvent binary mixtures. 展开更多
关键词 Acrylamide/Potassium 3-Sulfopropyl Methacrylate Biohybrid Hydrogel SWELLING Sodium Alginate BENTONITE Water-Solvent binary mixtures
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Excess Molar Volume of Binary Mixtures of Methylheptenone+Alkanols at 298.15 K
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作者 XIAO Xi LI Hao-ran +2 位作者 WANG Cong-min WANG Qi HAN Shi-jun 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第4期427-429,共3页
Excess molar volume(V E) data on binary liquid mixtures of methylheptenone (MHO) with methanol, ethanol, n-propanol or n-butanol have been determined from the density measurements at 298.15 K and atmospheric pressure... Excess molar volume(V E) data on binary liquid mixtures of methylheptenone (MHO) with methanol, ethanol, n-propanol or n-butanol have been determined from the density measurements at 298.15 K and atmospheric pressure. The values of V E in all the systems over the entire composition range are quantified by the Redlich-Kister equation. The effects of the chain length of alkanols on V E are discussed. 展开更多
关键词 Excess molar volume binary mixtures Methylheptenone ALKANOL DENSITY
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Phase behaviors of binary mixtures composed of banana-shaped and calamitic mesogens
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作者 M.Cvetinov D.Z.Obadovic +4 位作者 M.Stojanovic A.Vajda K.Fodor-Csorba N.Eber I.Ristic 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第9期341-346,共6页
In this work, five mixtures with different concentrations of banana-shaped and calamitic compounds have been prepared and subsequently studied by polarizing optical microscopy, differential scanning calorimetry, and X... In this work, five mixtures with different concentrations of banana-shaped and calamitic compounds have been prepared and subsequently studied by polarizing optical microscopy, differential scanning calorimetry, and X-ray diffraction on non-oriented samples. The phase sequences and molecular parameters of the binary systems are presented. 展开更多
关键词 liquid crystals MESOGENS binary mixtures phase transitions
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Particle velocity measurement of binary mixtures in the riser of a circulating fluidized bed by the combined use of electrostatic sensing and high-speed imaging
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作者 Wen-Biao Zhang Tian-Yu Wang +2 位作者 Yao-Yao Liu Wen-Bo Zhan Chi-Hwa Wang 《Petroleum Science》 SCIE CAS CSCD 2020年第4期1159-1170,共12页
The flow dynamics of binary particle mixtures in the fluidized bed needs to be monitored in order to optimize the related industrial processes.In this paper,electrostatic sensing and high-speed imaging are applied to ... The flow dynamics of binary particle mixtures in the fluidized bed needs to be monitored in order to optimize the related industrial processes.In this paper,electrostatic sensing and high-speed imaging are applied to measure the velocities of polyethylene and sand particles in the binary particle mixtures in fluidization.Experimental studies were conducted on a lab-scale cold circulating fluidized bed.Correlation function between electrostatic signals from upstream and downstream electrodes placed along the riser shows two peaks that represent transit times for the two types of particles.To verify the above results,high-speed imaging was adopted to capture the flow images of particle mixtures.Particle Image Velocimetry and Particle Tracking Velocimetry algorithms were utilized to process the resulted images in order to measure the velocities of polyethylene and sand particles.The reasons for two-peak correlation functions are illustrated based on the frequency spectrums of the mono-solid-phase electrostatic signals and the velocity difference between polyethylene and sand particles.Finally,comparisons on the velocities obtained from electrostatic sensing and high-speed imaging demonstrate the electrostatic sensor can roughly estimate the particle velocity of binary particle mixtures in the near wall region of the circulating fluidized bed. 展开更多
关键词 binary mixtures Fluidized bed Electrostatic sensor High-speed imaging
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Excess Molar Volume and Apparent Molar Volume of Binary Mixtures of 2-Methyl-3-buten-2-ol with 1-Alcohol at 298.15K
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作者 刘迪霞 李浩然 +1 位作者 邓东顺 韩世钧 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第4期454-458,共5页
Excess molar volumes (V^E_m) of binary mixtures of2-methyl-3-buten-3-ol [CH_3C(OH)(CH_3)CHCG_2] with four 1-alcohols:methanol, ethanol, 1-propanol and l-butanol at 298.15 K andatmospheric pressure are derived from den... Excess molar volumes (V^E_m) of binary mixtures of2-methyl-3-buten-3-ol [CH_3C(OH)(CH_3)CHCG_2] with four 1-alcohols:methanol, ethanol, 1-propanol and l-butanol at 298.15 K andatmospheric pressure are derived from density measurements with avibrating-tube densimeter. All the excess volumes are negative in thesystems over the entire composition range. The results are correlatedwith the Redlich-Kister equation. The effects of chain length ofl-alcohols on V^E_m are discussed. The apparent molar volumes of2-methyl-3-ol and l-alcohols are calculated respectively. 展开更多
关键词 excess molar volume binary mixture 2-methyl-3-buten-2-ol l-alcohol
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MONOMOLECULAR FILMS OF COPOLYMERS OF OXYETHYLENE AND OXYPROPYLENE, POLYPROPYLENE GLYCOL AND THEIR BINARY MIXTURES
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作者 李外郎 丁法祥 顾惕人 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1989年第2期119-123,共5页
The behaviour of monolayers of copolymers of oxyethylene and oxypropylene (UH29 and UH68), polypropylene glycol (UHPPG)and their binary mixtures on air-water interface has been investigated carefully on compression-ex... The behaviour of monolayers of copolymers of oxyethylene and oxypropylene (UH29 and UH68), polypropylene glycol (UHPPG)and their binary mixtures on air-water interface has been investigated carefully on compression-expansion cycles. The first compression isotherm is approximately an equilibrium one. In the UHPPG-UH29 and UHPPG-UH68 systems, the calculated average π-a curves based on simple additivity of the two individual components coincide with the experimental results reasonably well. It is suggested that the two components are miscible and form near-ideal solution at the air-water interface. The compression-expansion cycle experiments shows some degree of hysteresis. The order of degree of hysteresis for individual components is UH68>UH29>UHPPG. The explanation for the hysteresis is proposed. 展开更多
关键词 Monolayer Copolymer of oxyethylene and oxypropylene Polypropylene glycol binary mixture Compression-expansion
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A Review on the Evaporation Dynamics of Sessile Drops of Binary Mixtures:Challenges and Opportunities
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作者 Pradeep Gurrala Saravanan Balusamy +1 位作者 Sayak Banerjee Kirti Chandra Sahu 《Fluid Dynamics & Materials Processing》 EI 2021年第2期253-284,共32页
The wetting and evaporation dynamics of sessile droplets have gained considerable attention over the last few years due to their relevance to many practical applications,ranging from a variety of industrial problems t... The wetting and evaporation dynamics of sessile droplets have gained considerable attention over the last few years due to their relevance to many practical applications,ranging from a variety of industrial problems to several biological systems.Droplets made of binary mixtures typically undergo complex dynamics due to the differential volatility of the considered components and the ensuing presence of thermocapillary effects.For these reasons,many research groups have focused on the evaporation of binary droplets using a variegated set of experimental,numerical,and purely theoretical approaches.Apart from reviewing the state-of-the-art about the existing experimental,analytical,and computational techniques used to study the evaporation dynamics of binary sessile droplets,we also provide some indications about possible future research directions in this specific area. 展开更多
关键词 Wetting dynamics EVAPORATION sessile droplet binary mixture thermocapillary flow
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Investigation of solids segregation of binary mixtures in a rotating drum at various Froude numbers
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作者 何玉荣 门玉宾 +1 位作者 刘元春 刘文铁 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2010年第5期701-705,共5页
To investigate the effect of the Froude number(Fr)on solid segregation in a rotating drum,a two dimensional mathematical modelling on solids behaviour in horizontally oriented rotating drums operated in rolling,cascad... To investigate the effect of the Froude number(Fr)on solid segregation in a rotating drum,a two dimensional mathematical modelling on solids behaviour in horizontally oriented rotating drums operated in rolling,cascading and cataracting modes has been carried out by using Euler-Euler multi-fluid model in Fluent6.2 environment.Small particles and big particles are used in the work as binary mixtures to investigate segregation characteristics.The effect of Froude number(rotating velocity)on the flow field is investigated.It is found that the model captures the main features of solids motion and segregation in the drum and numerical results agree well with limited experimental data for solid velocity. 展开更多
关键词 Solids segregation binary mixture rotating drum Froude number numerical simulation
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Interaction between Cationic Surfactants and Bromopyrogallol Red as well as Its Application for the Sensitive and Selective Determination of Mo in Mo/W Binary Mixtures
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作者 Xi Rong HUANG Shu Hua HAN +2 位作者 Wen Juan ZHANG Yong Quan YIN Gui Ying XU (Department of Chemistry, Shandong University, Jinan 250100) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第6期523-526,共4页
Prior to formation of the micelles of cationic surfactant (CSF), bromopyrogallol red (BPR) could exist in the forms of both monomer and oligomer After that, however, only BPR monomer existed. Nonionic surfactant OP-10... Prior to formation of the micelles of cationic surfactant (CSF), bromopyrogallol red (BPR) could exist in the forms of both monomer and oligomer After that, however, only BPR monomer existed. Nonionic surfactant OP-10 favoured the oligomerization of BPR monomer. The mixed micellar media prepared by mixing CSF and OP-10 in an appropriate ratio could be used for the sensitive and selective determination of Mo in Mo/W binary mixtures. 展开更多
关键词 well MO Interaction between Cationic Surfactants and Bromopyrogallol Red as well as Its Application for the Sensitive and Selective Determination of Mo in Mo/W binary mixtures
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Ultrasonic, Volumetric and Isentropic Compressibility of Binary Mixtures of 1,4-Dioxane with Primary Alcohols at 303.15 K
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作者 Seema Agarwal Dhirendra Kumar Sharma 《Open Journal of Physical Chemistry》 2021年第3期168-181,共14页
Density, viscosity and sound velocity of six binary liquid mixtures of methanol, ethanol, propanol, butanol, hexanol and octanol with 1,4-dioxane have been measured over the entire range of composition at temperature ... Density, viscosity and sound velocity of six binary liquid mixtures of methanol, ethanol, propanol, butanol, hexanol and octanol with 1,4-dioxane have been measured over the entire range of composition at temperature 303.15K. From the experimental densities, viscosities and sound velocity, the excess molar volume (<i>V<sup>E</sup></i>), deviation in viscosity (Δ<i>η</i>) and deviation in isentropic compressibility (Δ<i>K<sub>S</sub></i>) have been calculated. The results have been used to discuss the nature and strength of intermolecular interactions in these mixtures. 展开更多
关键词 DENSITY VISCOSITY Sound Velocity Excess Molar Volume Viscosity Deviation Isentropic Compressibility binary mixtures ALCOHOLS
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Water Sorption Behaviors of Novel Biohybrid Hydrogels as Effective Sorbents in Water-Solvent Binary Mixtures
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作者 Erdener Karadağ Belgin Yel +1 位作者 Semiha Kundakcı Ömer Barış Üzüm 《Journal of Encapsulation and Adsorption Sciences》 2020年第3期43-70,共28页
Novel sorbent hydrogels containing acrylamide/sodium vinylsulfonate, carboxymethyl cellulose and zeolite were synthesized with free radical solution polymerization by using ammonium persulfate/<i><span style=... Novel sorbent hydrogels containing acrylamide/sodium vinylsulfonate, carboxymethyl cellulose and zeolite were synthesized with free radical solution polymerization by using ammonium persulfate/<i><span style="font-family:Verdana;">N</span></i><span style="font-family:Verdana;">,</span><i><span style="font-family:Verdana;">N</span></i><span style="font-family:Verdana;">,</span><i><span style="font-family:Verdana;">N’</span></i><span style="font-family:Verdana;">,</span><i><span style="font-family:Verdana;">N’</span></i><span style="font-family:Verdana;">-tetramethylethyle</span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">nediamine as redox initiating pair in presence of poly(ethylene glycol) diacrylate as crosslinker. It was to investigate the water uptake properties of series of the novel hydrogels, the semi IPNs and the hybrid/biohybrid composite hydrogel sorbents synthesized in this study. Water uptake studies were performed in water and in water-solvent (acetone, methanol and tetrahydrofuran) binary mixtures at 25</span></span></span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">°</span><span style="font-family:Verdana;">C, gravimetrically. Some swelling and diffusion parameters were calculated and discussed. It has been seen that the lower equilibrium swelling factor values in all solvent compositions in comparison with the equilibrium swelling factor values in water.</span></span></span></span> 展开更多
关键词 Acrylamide/Sodium Vinylsulfonate Biohybrid Hydrogel SWELLING Carboxymethyl Cellulose ZEOLITE Water-Solvent binary mixtures
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Hydrogen release of NaBH_(4) below 60 ℃ with binary eutectic mixture of xylitol and erythritol additive
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作者 Yugang Shu Jiaguang Zheng +4 位作者 Chengguo Yan Ao Xia Meiling Lv Zhenxuan Ma Zhendong Yao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第7期225-234,共10页
NaBH_(4) was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8%(mass)and high volumetric hydrogen capacity of around 115 g·L^(–1).However,it exh... NaBH_(4) was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8%(mass)and high volumetric hydrogen capacity of around 115 g·L^(–1).However,it exhibits strong stability and requires temperatures above 500℃ for hydrogen release in practical applications.In this study,two polyhydric alcohols,xylitol and erythritol(XE),were prepared as a binary eutectic sugar alcohol through a grinding-melting method.This binary eutectic sugar alcohol was used as a proton-hydrogen carrier to destabilize NaBH_(4).The 19NaBH_(4)-16XE composite material prepared by ball milling could start releasing hydrogen at 57.5℃,and the total hydrogen release can reach over 88.8%(4.45%(mass))of the theoretical capacity.When the 19NaBH_(4)-16XE composite was pressed into solid blocks,the volumetric hydrogen capacity of the block-shaped composite could reach 67.2 g·L^(–1).By controlling the temperature,the hydrogen desorption capacity of the NaBH_(4)-XE composite material was controllable,which has great potential for achieving solid-state hydrogen production from NaBH_(4). 展开更多
关键词 HYDROGEN DESORPTION binary mixture NaBH_(4) XYLITOL ERYTHRITOL
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