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Capparis spinosa L waste activated carbon as an efficient adsorbent for crystal violet toxic dye removal: Modeling, optimization by experimental design, and ecological analysis
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作者 Mohammed Benjelloun Youssef Miyah +8 位作者 Salma Ssouni Soulaiman Iaich Mohamed El-habacha Salek Lagdali Khadija Saka El Mustafa Iboustaten Abdelaziz Ait Addi Sanae Lairini Rabia Bouslamti 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第7期283-302,共20页
Textile dyes are dramatic sources of pollution and non-aesthetic disturbance of aquatic life and therefore represent a potential risk of bioaccumulation that can affect living species.It is imperative to reduce or eli... Textile dyes are dramatic sources of pollution and non-aesthetic disturbance of aquatic life and therefore represent a potential risk of bioaccumulation that can affect living species.It is imperative to reduce or eliminate these dyes from liquid effluents with innovative biomaterials and methods.Therefore,this research aims to highlight the performance of Capparis spinosa L waste-activated carbon(CSLW-AC)adsorbent to remove crystal violet(CV)from an aqueous solution.The mechanism of CV adsorption on CSLW-AC was evaluated based on the coupling of experimental data and different characterization techniques.The efficiency of the CSLW-AC material reflected by the equilibrium adsorption capacity of CV could reach more than 195.671 mg·g^(–1) when 0.5 g·L^(–1) of CSLW-AC(Particle size≤250μm)is introduced into the CV of initial concentration of 100 mg·L^(–1) at pH 6 and temperature 65℃ and in the presence of potassium ions after 60 min of contact time according to the one parameter at a time studies.The adsorption behavior of CV on CSLW-AC was found to be consistent with the pseudo-second-order kinetic model and Frumkin's linear isothermal model.The thermodynamic aspects indicate that the process is physical,spontaneous,and endothermic.The optimization of the process by the Box Behnken design of experiments resulted in an adsorption capacity approaching 183.544 mg·g^(–1)([CV]=100 mg·L^(–1) and[CSLW-AC]=0.5 g·L^(–1) at 35 min).The results of the Lactuca sativa seeds germination in treated CV(70%),adsorbent solvent and thermal regeneration(more than 5 cycles),and process cost analysis(1.0484 USD·L^(–1))tests are encouraging and promising for future exploitations of the CSLW-AC material in different industrial fields. 展开更多
关键词 Box Behnken Capparis spinosa L waste-activated carbon Cost analysis isotherm KINETIC Regeneration
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Synthesis of indirect work exchange networks considering both isothermal and adiabatic process together with exergy analysis 被引量:2
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作者 Yu Zhuang Linlin Liu +1 位作者 Lei Zhang Jian Du 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第8期1644-1652,共9页
In this paper, an efficient methodology for synthesizing the indirect work exchange networks(WEN) considering isothermal process and adiabatic process respectively based on transshipment model is first proposed. In co... In this paper, an efficient methodology for synthesizing the indirect work exchange networks(WEN) considering isothermal process and adiabatic process respectively based on transshipment model is first proposed. In contrast with superstructure method, the transshipment model is easier to obtain the minimum utility consumption taken as the objective function and more convenient for us to attain the optimal network configuration for further minimizing the number of units. Different from division of temperature intervals in heat exchange networks,different pressure intervals are gained according to the maximum compression/expansion ratio in consideration of operating principles of indirect work exchangers and the characteristics of no pressure constraints for stream matches. The presented approach for WEN synthesis is a linear programming model applied to the isothermal process, but for indirect work exchange networks with adiabatic process, a nonlinear programming model needs establishing. Additionally, temperatures should be regarded as decision variables limited to the range between inlet and outlet temperatures in each sub-network. The constructed transshipment model can be solved first to get the minimum utility consumption and further to determine the minimum number of units by merging the adjacent pressure intervals on the basis of the proposed merging methods, which is proved to be effective through exergy analysis at the level of units structures. Finally, two cases are calculated to confirm it is dramatically feasible and effective that the optimal WEN configuration can be gained by the proposed method. 展开更多
关键词 Work exchange networks Transshipment model Adiabatic process Exergy analysis isothermal process Work cascade
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Non-Isothermal Kinetic Analysis of Thermal Decomposition of the Ca-Bentonite from Santai, China
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作者 ZHANG Xianghui HE Chuan +3 位作者 WANG Ling DENG Miao LIU Jing FENG Qian 《矿物学报》 CAS CSCD 北大核心 2013年第S1期138-138,共1页
The thermal decompositions of Ca-bentonites (CaB) from Santai ,Shichuan Province, China over the temperature rage of 30-1100℃ were investigated by simultaneous thermal analyzer. Non-isothermal Kinetic analysis were e... The thermal decompositions of Ca-bentonites (CaB) from Santai ,Shichuan Province, China over the temperature rage of 30-1100℃ were investigated by simultaneous thermal analyzer. Non-isothermal Kinetic analysis were employed to study the thermal decomposition mechanism by using Netzsch Thermokinetics software. The dependence of the activation energy on conversion degree were evaluated by isoconversional methods. The probably mechanism and the corresponding kinetic parameters were determined by multivariate non-linear regression program. 展开更多
关键词 NON-isothermal KINETIC SIMULTANEOUS THERMAL analysis CA-BENTONITE THERMAL d
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Error Analysis of Adsorption Isotherm Models for Acid Dyes onto Bamboo Derived Activated Carbon 被引量:2
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作者 L.S.Chan W.H.Cheung +1 位作者 S.J.Allen G.McKay 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第3期535-542,共8页
High surface area activated carbons were produced by thermal activation of waste bamboo scaffolding with phosphoric acid.Single component equilibrium dye adsorption was conducted on the carbons produced and compared w... High surface area activated carbons were produced by thermal activation of waste bamboo scaffolding with phosphoric acid.Single component equilibrium dye adsorption was conducted on the carbons produced and compared with a commercially available carbon.Two acid dyes with different molecular sizes,namely Acid Yellow 117(AY117) and Acid Blue 25(AB25),were used to evaluate the adsorption capacity of the produced carbons.It was found that the dye with smaller molecular size,AB 25,was readily adsorbed onto the produced carbon,nearly three times higher than a commercially available carbon,while the larger size dye,AY117,showed little adsorption.The experimental data were analyzed using isotherm equations including Langmuir,Freundlich,Tempkin,Toth,Redlich-Peterson and Sips equations.The equilibrium data were then analyzed using five different non-linear error analysis methods. 展开更多
关键词 ADSORPTION activated carbon acid dye equilibrium isotherm error analysis BAMBOO
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Comparison of Frontal Analysis and Elution-Curve Method for Determining Adsorption Isotherms
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作者 Ju-Weon LEE Kyung Ho ROW 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第6期720-722,共3页
Adsorption isotherm is the most fundamental information related to chromatography. To calculate the parameters of Langmuir ad-sorption isotherm of thymidine, frontal analysis (FA) and elution-curve method (ECM) were a... Adsorption isotherm is the most fundamental information related to chromatography. To calculate the parameters of Langmuir ad-sorption isotherm of thymidine, frontal analysis (FA) and elution-curve method (ECM) were adopted in reversed-phase high performance liguid chromatography (RP-HPLC). In FA, the concentration of stationary phase was measured from the elution curves and the isotherm was deter-mined by regression analysis, while the parameters by ECM were obtained by parameter optimization. The adsorption isotherms of thymidine from the two methods were very similar. The superiority of ECM over FA was that the consumption of sample was less and only one or two in-jections of sample were required. 展开更多
关键词 frontal analysis elution-curve method adsorption isotherm reversed-phase high performance liguid chromatography *
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Use of ANSYS for Thermal Analysis in Mass Concrete 被引量:2
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作者 Nailde de Amorim Coelho Lineu Jose Pedroso Joao Henrique da Silva Rego Antonio Alberto Nepomuceno 《Journal of Civil Engineering and Architecture》 2014年第7期860-868,共9页
With the increasing development of Brazil in recent years, major engineering construction works have been designed and built, partieutarly those involving large volumes of mass concrete, such as in the case of dams. M... With the increasing development of Brazil in recent years, major engineering construction works have been designed and built, partieutarly those involving large volumes of mass concrete, such as in the case of dams. Mass concrete, due to its large size and volume, presents a considerable temperature rise caused by cement grain hydration. This temperature rise can be sufficient to cause concrete crack and/or cracking, which may lead to serious problems. In this paper, we sought to study heat generation and temperature field in mass concrete through ANSYS software, which uses finite element method to analyze the problem. This program allows temperatures to be checked for different concrete ages. With that, it is possible to evaluate the temperatures obtained and the factors influencing the results in a short period of time at a low cost. With the help of the software, it is possible to check the temperatures for different concrete properties by analyzing them on different concreting days. Therefore, it was possible to establish that the properties of the concrete directly influence the temperature evolution phenomenon. 展开更多
关键词 TEMPERATURE mass concrete isotherms numerical analysis.
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Defect analysis of complex-shape aluminum alloy forging 被引量:2
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作者 单德彬 张艳秋 +3 位作者 王勇 徐福昌 徐文臣 吕炎 《中国有色金属学会会刊:英文版》 CSCD 2006年第A03期1574-1579,共6页
The isothermal precision forging was applied for the purpose of forming aluminum alloy with complex shape. The complexity of forging is easy to lead to the occurrence of the defects, such as underfilling, folding, met... The isothermal precision forging was applied for the purpose of forming aluminum alloy with complex shape. The complexity of forging is easy to lead to the occurrence of the defects, such as underfilling, folding, metal flow lines disturbance and fibre breaking. The reasons for the defects were analyzed on the basis of experiments and finite element method(FEM). The results show that the size of flash gutter bridge, the lubricating condition and the deformation process are the main factors influencing the filling qualities of complex-shape aluminum alloy forging. The folding defect is mainly caused by different velocities of filling cavities, fast flow of much metal in one direction and confluence of two or multi metal strands. Improper metal distribution in different regions can cause the flow lines disturbance and fast metal flow in one direction is also a cause of the flow lines disturbance. According to the reasons, some measures were taken to improve the quality of the forged parts.These studies can contribute to offering some experiences in making process project and optimizing the process parameters for forging complex-shape aviation products. 展开更多
关键词 缺损分析 铝合金 等温 有限元分析 金属成形
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3D FEA simulation of 4A11 piston skirt isothermal forging process 被引量:2
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作者 董万鹏 陈军 《中国有色金属学会会刊:英文版》 EI CSCD 2008年第5期1196-1200,共5页
To eliminate the defects during piston skirt isothermal forming process,simulations under different process parameters such as the deformation temperature and friction factor were analyzed with the rigid-plastic FEA.D... To eliminate the defects during piston skirt isothermal forming process,simulations under different process parameters such as the deformation temperature and friction factor were analyzed with the rigid-plastic FEA.Deformation pattern,metal flow and influence of process parameters were concluded.The prediction load value with a relative error of 4.98% is more accurate to the testing one than that from the empirical formula whose relative error is up to 50.8%.Finally,based on the simulation results,an improved process at 300 ℃ and 0.005-0.05 s-1 was verified without any defects by the physical try-out. 展开更多
关键词 有限元分析 活塞裙 等温成型 燃烧机车
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Non-Isothermal Degradation and Thermodynamic Properties of Pine Sawdust
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作者 Zephania Chaula Geoffrey John +2 位作者 Mahir Said Samwel Manyele Cuthbert Mhilu 《Smart Grid and Renewable Energy》 2018年第12期272-284,共13页
The study of non-isothermal kinetics analyzed the reactivity of pine sawdust, while the thermodynamic properties analyzed energy consumed and released from the pine sawdust. The kinetic parameters were determined by a... The study of non-isothermal kinetics analyzed the reactivity of pine sawdust, while the thermodynamic properties analyzed energy consumed and released from the pine sawdust. The kinetic parameters were determined by analyzing mass loss of pine sawdust components by using Thermogravimeric analyzer. The cellulose has the highest conversion rate of 9.5%/min at 610 K compared to hemicellulose and lignin, which are 5%/min at 600 K and 2%/min at 800 K, respectively. The activation Energy for cellulose, hemicellulose and lignin was 457.644, 259.876, and 89.950 kJ/mol, respectively. The thermodynamic properties included the change of Gibbs free energy for cellulose and hemicellulose, which were -214.440 and -30.825 kJ/mol respectively, their degradation was spontaneous in forward direction, while change of Gibbs free energy for lignin was 207.507 kJ/mol, which is non-spontaneous reaction. The positive value of change of entropies for the active complex compounds formed from hemicellulose and cellulose is less stable, while the active complex compounds of lignin are characterized by a much higher degree of arrangement since its change of entropy is negative. The kinetic and thermodynamic properties show that pine sawdust is a good candidate for production of char since it is easier to remove hemicellulose through thermal process. 展开更多
关键词 PINE SAWDUST NON-isothermal Kinetics thermo-gravimetric analysis ACTIVATED Complex
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Geothermal structure revealed by curie isothermal surface under Guangdong Province,China
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作者 Yu-fei Xi Ya-bo Zhao DA Yuen 《Journal of Groundwater Science and Engineering》 2021年第2期114-120,共7页
Guangdong Province in Southeast China is noted for its numerous geothermal resources due to tectonic episodes,mainly occurred during the Cretaceous.The surface heat flow and geothermal gradient are the most direct way... Guangdong Province in Southeast China is noted for its numerous geothermal resources due to tectonic episodes,mainly occurred during the Cretaceous.The surface heat flow and geothermal gradient are the most direct ways to understand the temperature of the Earth.However,geothermal resources are poorly utilized in Guangdong Province due to limited numbers of boreholes and surficial hydrothermal fluids.To improve the understanding of underground temperature distribution in Guangdong Province,we have applied power-density spectral analysis to aeromagnetic anomaly data to calculate the depth of the Curie isothermal surface.Upward continuation is applied and tested to the magnetic data.The calculated Curie isotherm is between 18.5 km and 25 km below surface.The fluctuation in the depth range reflects lateral thermal perturbations in the Guangdong crust.In particular,the eastern,northern,western and coastline areas of the province have a relatively shallow Curie isotherm.By comparing the surface heat flow,geothermal gradient,distribution of Mesozoic granite-volcanic rocks,and natural hot springs,we conclude that during Mesozoic,magmatism exerted great influence on the deep thermal state of Guangdong Province.A shallow Curie isotherm surface,as well as numerous natural hot springs and high heat flow,show clear signatures of shallow heat sources. 展开更多
关键词 Curie isotherm surface Geothermal structure Spectrum analysis Guangdong Province
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黄铁矿在CO_(2)气氛下非等温氧化转化及动力学分析 被引量:1
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作者 黄芳 况怡婷 +3 位作者 张立麒 米铁 辛善志 刘晓烨 《燃烧科学与技术》 CAS CSCD 北大核心 2024年第1期82-90,共9页
针对煤中常见含铁矿物黄铁矿在富氧燃烧典型气氛下转化特性,通过同步热分析结合烟气分析研究了黄铁矿在CO_(2)气氛下的转化行为.结果发现,黄铁矿在CO_(2)气氛下主要经历5个失重阶段且均为吸热过程,首先是黄铁矿颗粒表面硫脱除的起始热解... 针对煤中常见含铁矿物黄铁矿在富氧燃烧典型气氛下转化特性,通过同步热分析结合烟气分析研究了黄铁矿在CO_(2)气氛下的转化行为.结果发现,黄铁矿在CO_(2)气氛下主要经历5个失重阶段且均为吸热过程,首先是黄铁矿颗粒表面硫脱除的起始热解段(相界面反应,n=1/2),活化能低于其在N_(2)气氛下近30 kJ/mol,为220.27 kJ/mol,随后裂解成磁黄铁矿(三维扩散,n=1/2)活化能与其在N_(2)(177.27 kJ/mol)下接近为178.1 kJ/mol;温度高于690℃,随着升温磁黄铁矿缓慢失硫,CO_(2)逐渐参与磁黄铁矿转化且释放SO_(2)和CO;820~1150℃经历双峰失重峰阶段,820~1020℃,氧化气体产物SO_(2)大量生成且在约1000℃达到体积浓度峰值;最后1020~1150℃,坩埚中残留物大量与CO_(2)持续氧化反应失重形成SO_(2)和CO,坩埚中形成复杂物相体系,铁硫化物和铁氧化物共存(或共融).CO_(2)参与黄铁矿产物转化失重阶段活化能分别为180.94 kJ/mol、229.69 kJ/mol和243.46 kJ/mol,动力学机制均为成核与生长(n=1). 展开更多
关键词 黄铁矿 非等温 CO_(2) 氧化转化 动力学
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基于等温模锻和自由锻工艺的120MN多功能重型锻造液压机有限元分析
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作者 王鑫 石磊 李明珠 《锻压装备与制造技术》 2024年第5期19-25,共7页
120MN兼顾等温模锻、自由锻的重型多功能锻造液压机是根据用户特定工艺需求设计,专用于航空、航天大型锻件研制实验的锻造液压机,属于重型锻造装备,功能兼容性较大,一台设备可兼顾自由锻开坯、模锻成形等工艺应用。首先根据技术参数要... 120MN兼顾等温模锻、自由锻的重型多功能锻造液压机是根据用户特定工艺需求设计,专用于航空、航天大型锻件研制实验的锻造液压机,属于重型锻造装备,功能兼容性较大,一台设备可兼顾自由锻开坯、模锻成形等工艺应用。首先根据技术参数要求设计三维模型,然后采用三维模拟软件对120MN多功能锻造液压机进行建模,并利用有限元分析软件ANSYS分析优化了液压机的机身结构,合理地优化了结构布局和材料利用率,为公称力在100MN~150MN范围间的多功能锻造液压机的快速设计提供了参考和借鉴。 展开更多
关键词 锻造液压机 自由锻 等温锻 ANSYS 液压机 有限元分析
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基于ANSYS的80MN等温锻造液压机有限元分析 被引量:1
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作者 米新征 孙伟 王鑫 《锻压装备与制造技术》 2024年第1期36-42,共7页
80MN等温锻造液压机是根据用户专有的工艺需求而设计的专用液压机,属于重型锻造装备。根据技术协议,要求设计出三维模型,然后采用三维软件SolidWorks对80MN等温锻造液压机进行建模,并利用有限元分析软件ANSYS分析优化液压机的机身结构,... 80MN等温锻造液压机是根据用户专有的工艺需求而设计的专用液压机,属于重型锻造装备。根据技术协议,要求设计出三维模型,然后采用三维软件SolidWorks对80MN等温锻造液压机进行建模,并利用有限元分析软件ANSYS分析优化液压机的机身结构,合理优化了结构布局和材料的利用率,为公称力在60MN~100MN范围间的等温锻造液压机的快速设计提供了参考和借鉴。 展开更多
关键词 SOLIDWORKS 等温锻造 液压机 有限元分析
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Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites
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作者 ZHANG De-chao ZHAN Li-hua +4 位作者 MA Bo-lin YAO Shun-ming GUO Jin-zhan GUAN Cheng-long LIU Shu 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第6期1838-1855,共18页
The vibration pretreatment-microwave curing process is an efficient,low energy consumption,and high-quality out-of-autoclave curing process for carbon fiber resin matrix composites.This study aims to investigate the i... The vibration pretreatment-microwave curing process is an efficient,low energy consumption,and high-quality out-of-autoclave curing process for carbon fiber resin matrix composites.This study aims to investigate the impact of vibration pretreatment temperature on the fiber weight content,microscopic morphology and mechanical properties of the composite laminates by using optical digital microscopy,universal tensile testing machine and thermo-gravimetric analyzer.Additionally,the combined mode of Bragg fiber grating sensor and temperature measurement fiber was employed to explore the effect of vibration pretreatment on the strain process during microwave curing.The study results revealed that the change in vibration pretreatment temperature had a slight impact on the fiber weight content when the vibration acceleration remained constant.The metallographic and interlaminar strength of the specimen formed at a vibration pretreatment temperature of 80℃ demonstrated a porosity of 0.414% and a 10.69% decrease in interlaminar shear strength compared to autoclave curing.Moreover,the introduction of the vibration energy field during the microwave curing process led to a significant reduction in residual strain in both the 0°and 90°fiber directions,when the laminate was cooled to 60℃. 展开更多
关键词 VIBRATION microwave curing POROSITY interlaminar shear strength thermo-gravimetric analysis curing strain
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注塑级聚乳酸热分解动力学分析
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作者 罗越峰 温桦浩 廖正福 《包装工程》 CAS 北大核心 2024年第7期45-52,共8页
目的研究注塑级聚乳酸材料的热分解动力学,准确理解注塑级聚乳酸的耐热稳定性,为开发耐高温阻燃注塑级聚乳酸(PLA)材料提供理论依据。方法通过非等温热重分析法,采用5、10、15、20、25℃/min的升温速率,研究注塑级PLA在氮气气氛中的热... 目的研究注塑级聚乳酸材料的热分解动力学,准确理解注塑级聚乳酸的耐热稳定性,为开发耐高温阻燃注塑级聚乳酸(PLA)材料提供理论依据。方法通过非等温热重分析法,采用5、10、15、20、25℃/min的升温速率,研究注塑级PLA在氮气气氛中的热分解行为,利用1种微分法和3种积分法进行详细的动力学计算。比较相关系数及标准偏差,选取KAS等温积分法,以相对偏差Ai=|1–αc/αe|为目标函数,利用16种热分解动力学机理模拟计算注塑级PLA热分解最合适的反应机理。结果得到了注塑级PLA热分解所需的活化能和指前因子,其中Kissinger、Madhusudanan-Krishnan-Ninan(MKN)、Kissinger-Akahira-Sunose(KAS)和Flynn-Wall-Ozawa(FWO)法计算所得注塑级PLA活化能分别为177.01、174.43、173.01和173.28 kJ/mol。指前因子分别为25.84、26.69~33.75、25.83~32.89和26.38~32.94。结论确定了随机成核和随后生长反应机理(A1/4),ln(β/T2)=ln[4.75×10^(9)/–ln(1–α)]–2.08×10^(4)/T是描述注塑级PLA热分解最合适的反应机理。 展开更多
关键词 注塑级聚乳酸 热分解动力学 非等温分析 反应机理
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等温变换与绝热变换在高水气比粗煤气反应中应用分析
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作者 武玥 《煤化工》 CAS 2024年第2期128-131,共4页
变换装置作为煤化工产业中核心反应装置之一,主要承担着一氧化碳转换的功能,而变换装置工艺的选择对于装置投产运行的经济性有较大的影响。重点介绍了等温变换与绝热变换工艺流程,并从工程投资、运行安全、运行消耗、运行操作等方面对... 变换装置作为煤化工产业中核心反应装置之一,主要承担着一氧化碳转换的功能,而变换装置工艺的选择对于装置投产运行的经济性有较大的影响。重点介绍了等温变换与绝热变换工艺流程,并从工程投资、运行安全、运行消耗、运行操作等方面对两种工艺进行了比较。 展开更多
关键词 等温变换 绝热变换 高水气比 对比分析
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响应面法优化LAMP反应冻干保护剂配方的研究
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作者 蔡文凯 祝珊珊 +2 位作者 郝宗杰 苏业俣 林艺平 《海南医学》 CAS 2024年第13期1889-1894,共6页
目的筛选出适用于甲流病毒环介导等温扩增技术(LAMP)的最佳冻干保护剂组合,建立起可在室温下长时间储存的甲流病毒核酸检测体系,为甲流现场快速检测和分级诊疗提供技术支持。方法以LAMP核酸扩增活性为评价指标,在单因素试验的基础上利... 目的筛选出适用于甲流病毒环介导等温扩增技术(LAMP)的最佳冻干保护剂组合,建立起可在室温下长时间储存的甲流病毒核酸检测体系,为甲流现场快速检测和分级诊疗提供技术支持。方法以LAMP核酸扩增活性为评价指标,在单因素试验的基础上利用三因素三水平的响应面法,探究冻干保护剂(海藻糖、牛血清白蛋白和甘露醇)对LAMP试剂的保护效果并优化冻干保护剂的组合。结果采用Box-Behnken试验结果进行回归模型拟合,LAMP试剂的保护剂最佳配方组合为7.64 wt%海藻糖、0.43 wt%牛血清白蛋白和0.85 wt%甘露醇。经真空冷冻干燥且加入保护剂后的LAMP试剂将以脱水形式贮存,可在常温下长期保持活性,使用时加水复溶即可。为了检验保护剂的稳定性,真空冷冻干燥后的LAMP试剂分别置于25℃和37℃下贮存,第0天、4天、8天、12天、16天、20天取出分别进行LAMP扩增活性检测。添加最优保护剂组合的LAMP冻干试剂其核酸扩增活性远大于添加单一保护剂或未添加冻干保护剂组。结论添加最优保护剂组合能够延长LAMP试剂的贮存时间和保持试剂的稳定性。 展开更多
关键词 响应面分析 环介导等温扩增技术 真空冷冻干燥 冻干保护剂
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Construction of high-pressure adsorption isotherm:A tool for predicting coalbed methane recovery from Jharia coalfield,India 被引量:1
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作者 Mohammad Asif D.C.Panigrahi +1 位作者 Paul Naveen Keka Ojha 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2019年第5期765-769,共5页
Adsorption isotherm relates the gas storage capacity as a function of pressure at constant temperature.In this paper,adsorption isotherm of two dry borehole samples was constructed in the laboratory using the manometr... Adsorption isotherm relates the gas storage capacity as a function of pressure at constant temperature.In this paper,adsorption isotherm of two dry borehole samples was constructed in the laboratory using the manometric method.Isotherm was measured for two gases,i.e.,CH4 and CO2 to pressure up to 8.4 MPa.Before the construction of sorption isotherm,coal was characterized by proximate,ultimate and petrographic analysis.Coalbed gas content of these two samples was found 2.29 m3/t and 2.75 m3/t.SEM images were obtained for the pore size distribution of coal using pore image analysis.Prediction of coalbed methane recovery from CH4 adsorption isotherm showed that these coalbeds are under saturated.CO2 isotherm was constructed to estimate enhanced coalbed methane(ECBM)recovery.Volume wise CO2/CH4 sorption ratio was found 2.09 times to 2.75 times respectively.This paper presents the interpretation of isotherm data to find the recovery factor of methane production from Jharia coalfield. 展开更多
关键词 Coalbed METHANE ADSORPTION isotherm PORE image analysis Gas content Jharia coalfield
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Combustion Property and Kinetic Modeling of Pulverized Coal Based on Non-isothermal Thermogravimetric Analysis 被引量:1
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作者 Jiu-gang SHAO Jian-liang ZHANG +2 位作者 Guang-wei WANG Zhe WANG Hong-wei GUO 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2014年第11期1002-1008,共7页
Non-isothermal combustion kinetics of two kinds of low volatile pulverized coals (HL coal and RU coal) were investigated by thermogravimetrie analysis. The results show that the combustibility of HL coal was better ... Non-isothermal combustion kinetics of two kinds of low volatile pulverized coals (HL coal and RU coal) were investigated by thermogravimetrie analysis. The results show that the combustibility of HL coal was better than that of RU coal, and with increasing heating rate, ignition and burnout characteristics of pulverized coal were improved. The volume model (VM), the random pore model (RPM), and the new model (NEWM) in which the whole combustion process is considered to be the overlapping process of volatile combustion and coal char combustion, were used to fit with the experimental data. The comparison of these three fitted results indicated that the combustion process of coal could be simulated by the NEWM with highest precision. When calculated by the NEWM, the activation energies of volatile combustion and coal char combustion are 130.5 and 95.7 kJ · mol^-1 for HL coal, respectively, while they are 114.5 and 147.6 kJ ·mol^-1 for RU coal, respectively. 展开更多
关键词 pulverized coal COMBUSTION kinetic model non-isothermal thermogravimetric analysis
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液体活塞近等温压缩空气储能过程热力性能评估 被引量:5
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作者 李瑞雄 邹瀚森 +3 位作者 姚尔人 陶瑞 席光 王焕然 《西安交通大学学报》 EI CAS CSCD 北大核心 2023年第5期58-67,共10页
为进一步实现液体活塞在压缩空气储能过程全局热力性能的准确与快速评估,建立了基于容器尺寸(a)和喷淋参数(b)的储能过程热力性能无量纲评价模型,探究了压缩空气在近等温储能过程的热力性能变化特性,进而明确了液体活塞设备在近等温压... 为进一步实现液体活塞在压缩空气储能过程全局热力性能的准确与快速评估,建立了基于容器尺寸(a)和喷淋参数(b)的储能过程热力性能无量纲评价模型,探究了压缩空气在近等温储能过程的热力性能变化特性,进而明确了液体活塞设备在近等温压缩空气储能系统中的重要地位。研究结果表明:无喷淋条件下,空气侧相对温度在无量纲a达到120时变化平缓,此时液体活塞可实现接近等温压缩,而较小的a会导致空气相对温度剧烈变化;喷淋条件下,近等温压缩过程主要出现在压缩过程中期,且增加无量纲b导致a对空气侧相对温度的影响逐渐弱化;液体活塞近等温压缩空气的理想运行效率可达到95%以上,而采用D155-30型号水泵驱动的液体活塞近等温压缩储能过程仅能实现66%的运行效率。 展开更多
关键词 压缩空气储能 近等温压缩 热力学评估 无量纲分析
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