期刊文献+
共找到20篇文章
< 1 >
每页显示 20 50 100
费—托合成实验中烷烃气碳同位素分馏机理 被引量:7
1
作者 杨春 王京红 +4 位作者 米敬奎 高晓辉 陶士振 倪云燕 陶小晚 《天然气地球科学》 EI CAS CSCD 北大核心 2011年第2期206-210,223,共6页
40多年来的费—托合成模拟实验表明,只有部分结果出现了烷烃气碳同位素反序现象。通过较为完整的分析发现,其原因可能是:随着模拟实验时间的增加与温度的升高并随着产物转化率的增高,控制烷烃气碳同位素分馏的因素逐渐由动力学机制转变... 40多年来的费—托合成模拟实验表明,只有部分结果出现了烷烃气碳同位素反序现象。通过较为完整的分析发现,其原因可能是:随着模拟实验时间的增加与温度的升高并随着产物转化率的增高,控制烷烃气碳同位素分馏的因素逐渐由动力学机制转变为热力学平衡,烷烃气碳同位素序列将由反序转变为部分倒转再到类似常规天然气的正序分布。只有在较短时间(转化率较低)或者开放体系(随生随排)条件下才遵从动力学分馏。电火花放电合成实验仅代表了理想状态下动力学分馏过程。 展开更多
关键词 费—托合成 烷烃气碳同位素 动力学分馏 热力学平衡
原文传递
松辽盆地深部地壳构造特征与无机油气生成模式 被引量:15
2
作者 卫平生 张景廉 +1 位作者 张虎权 石兰亭 《地球物理学进展》 CSCD 北大核心 2008年第5期1507-1513,共7页
松辽盆地中地壳有一低速—高导层(也称塑性层),中地壳的塑性层与松辽盆地的成因以及盆山耦合系统有关.盆地地幔流体活动有下列表现:(1)高热流、高地温场;(2)深大断裂与火山岩喷溢;(3)碱交代作用(如钠长石化、伊利石化);(4)Mg2+交代作用... 松辽盆地中地壳有一低速—高导层(也称塑性层),中地壳的塑性层与松辽盆地的成因以及盆山耦合系统有关.盆地地幔流体活动有下列表现:(1)高热流、高地温场;(2)深大断裂与火山岩喷溢;(3)碱交代作用(如钠长石化、伊利石化);(4)Mg2+交代作用(如白云石化)等等.地球化学省与地球化学急变带控制了大油气田的分布并显示了盆地发生的壳—幔相互作用.中地壳的低速—高导层不是岩浆岩,而是一充满地幔流体的地质体,它们富含氢、碱金属(K+、Na+)、卤素(F-、Cl-)、碳(甲烷、CO、CO2)、氮、硫等.在中地壳的温度压力条件下,在Fe、Ni等催化剂的参与下,H2与CO(CO2)可发生费—托合成烃的反应.实验表明:这个反应不仅可生成气态烃还可生成液态烃,并将发生碳同位素分馏作用.松辽盆地的U形运移模型受到质疑.按照石油无机生成的模型,松辽盆地的深部将会有更多的石油与天然气,庆深气田的发现便是一个明证. 展开更多
关键词 中地壳 低速—高导层 地幔流体 费—托合成 石油的无机成因 松辽盆地
下载PDF
Effects of zinc on Fe-based catalysts during the synthesis of light olefins from the Fischer-Tropsch process 被引量:10
3
作者 高新华 张建利 +4 位作者 陈宁 马清祥 范素兵 赵天生 椿范立 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第4期510-516,共7页
Fe‐based catalysts for the production of light olefins via the Fischer‐Tropsch synthesis were modi‐fied by adding a Zn promoter using both microwave‐hydrothermal and impregnation methods. The physicochemical prope... Fe‐based catalysts for the production of light olefins via the Fischer‐Tropsch synthesis were modi‐fied by adding a Zn promoter using both microwave‐hydrothermal and impregnation methods. The physicochemical properties of the resulting catalysts were determined by scanning electron mi‐croscopy, the Brunauer‐Emmett‐Teller method, X‐ray diffraction, H2 temperature‐programed re‐duction and X‐ray photoelectron spectroscopy. The results demonstrate that the addition of a Zn promoter improves both the light olefin selectivity over the catalyst and the catalyst stability. The catalysts prepared via the impregnation method, which contain greater quantities of surface ZnO, exhibit severe carbon deposition following activity trials. In contrast, those materials synthesized using the microwave‐hydrothermal approach show improved dispersion of Zn and Fe phases and decreased carbon deposition, and so exhibit better CO conversion and stability. 展开更多
关键词 Zn promoter Fe-based catalyst Light olefin Fischer-Tropsch synthesis Microwave-hydrothermal method
下载PDF
A facile solvent-free synthesis strategy for Co-imbedded zeolite-based Fischer-Tropsch catalysts for direct gasoline production 被引量:5
4
作者 Mudassar Javed Shilin Cheng +7 位作者 Guihua Zhang Cederick Cyril Amoo Jingyan Wang Peng Lu Chengxue Lu Chuang Xing Jian Sun Noritatsu Tsubaki 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第4期604-612,共9页
A series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding route.The catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with t... A series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding route.The catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with their counterpart Co-impregnated zeolite-based catalysts.Successful transformation of solid raw materials to targeted zeolite was confirmed by XRD,SEM,STEM,and N2 physisorption analysis.An in-depth study of acidic strength and acidic site distribution was conducted by NH3-TPD and Py-IR spectroscopy.Acidic strength showed a pivotal role in defining product range.Co@S1,with the weakest acidic strength of silicalite-1 among three types of zeolites,evaded over-cracking of product and exhibited the highest gasoline and isoparaffin selectivity(≈70%and 30.7%,respectively).Moreover,the solvent-free raw material grinding route for zeolite synthesis accompanies several advantages like the elimination of production of wastewater,high product yield within confined crystallization space,and elimination of safety concerns regarding high pressure due to the absence of the solvent.Facileness and easiness of the solvent-free synthesis route together with promising catalytic performance strongly support its application on the industrial scale. 展开更多
关键词 Solvent-free synthesis Co-imbedded zeolite catalyst Fischer-Tropsch synthesis Gasoline ISOPARAFFIN
下载PDF
Effect of the support on cobalt carbide catalysts for sustainable production of olefins from syngas 被引量:4
5
作者 Xinxing Wang Wen Chen +7 位作者 Tiejun Lin Jie Li Fei Yu Yunlei An Yuanyuan Dai Hui Wang Liangshu Zhong Yuhan Sun 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第12期1869-1880,共12页
Co2C‐based catalysts with SiO2,γ‐Al2O3,and carbon nanotubes(CNTs)as support materials were prepared and evaluated for the Fischer‐Tropsch to olefin(FTO)reaction.The combination of catalytic performance and structu... Co2C‐based catalysts with SiO2,γ‐Al2O3,and carbon nanotubes(CNTs)as support materials were prepared and evaluated for the Fischer‐Tropsch to olefin(FTO)reaction.The combination of catalytic performance and structure characterization indicates that the cobalt‐support interaction has a great influence on the Co2C morphology and catalytic performance.The CNT support facilitates the formation of a CoMn composite oxide during calcination,and Co2C nanoprisms were observed in the spent catalysts,resulting in a product distribution that greatly deviates from the classical Anderson‐Schulz‐Flory(ASF)distribution,where only 2.4 C%methane was generated.The Co3O4 phase for SiO2‐andγ‐Al2O3‐supported catalysts was observed in the calcined sample.After reduction,CoO,MnO,and low‐valence CoMn composite oxide were generated in theγ‐Al2O3‐supported sample,and both Co2C nanospheres and nanoprisms were identified in the corresponding spent catalyst.However,only separated phases of CoO and MnO were found in the reduced sample supported by SiO2,and Co2C nanospheres were detected in the spent catalyst without the evidence of any Co2C nanoprisms.The Co2C nanospheres led to a relatively high methane selectivity of 5.8 C%and 12.0 C%of theγ‐Al2O3‐and SiO2‐supported catalysts,respectively.These results suggest that a relatively weak cobalt‐support interaction is necessary for the formation of the CoMn composite oxide during calcination,which benefits the formation of Co2C nanoprisms with promising catalytic performance for the sustainable production of olefins via syngas. 展开更多
关键词 Fischer‐Tropsch to olefins Cobalt carbide Supported catalyst OLEFIN SYNGAS
下载PDF
Particle Size and Crystal Phase Effects in Fischer-Tropsch Catalysts 被引量:7
6
作者 Jin-xun Liu Peng Wang +1 位作者 Wayne Xu Emiel J. M. Hensen 《Engineering》 SCIE EI 2017年第4期467-476,共10页
Fischer-Tropsch synthesis (FTS) is an increasingly important approach for producing liquid fuels and chemicals via syngas-that is, synthesis gas, a mixture of carbon monoxide and hydrogen-generated from coal, natura... Fischer-Tropsch synthesis (FTS) is an increasingly important approach for producing liquid fuels and chemicals via syngas-that is, synthesis gas, a mixture of carbon monoxide and hydrogen-generated from coal, natural gas, or biomass. In FTS, dispersed transition metal nanoparticles are used to catalyze the reactions underlying the formation of carbon-carbon bonds. Catalytic activity and selectivity are strongly correlated with the electronic and geometric structure of the nanoparticles, which depend on the particle size, morphology, and crystallographic phase of the nanoparticles. In this article, we review recent works dealing with the aspects of bulk and surface sensitivity of the FTS reaction. Understanding the different catalytic behavior in more detail as a function of these parameters may guide the design of more active, selective, and stable FTS catalysts. 展开更多
关键词 Fischer-Tropsch synthesis Iron COBALT and ruthenium carbides Size effect Crystal structure
下载PDF
Recent advances in application of iron‐based catalysts for CO_(x) hydrogenation to value‐added hydrocarbons 被引量:3
7
作者 Junhui Liu Yakun Song +2 位作者 Xuming Guo Chunshan Song Xinwen Guo 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第3期731-754,共24页
The widespread utilization of fossil fuels has caused an associated increase in CO_(2) emissions over the past few decades,which has resulted in global warming and ocean acidification.CO hydrogenation(Fischer‐Tropsch... The widespread utilization of fossil fuels has caused an associated increase in CO_(2) emissions over the past few decades,which has resulted in global warming and ocean acidification.CO hydrogenation(Fischer‐Tropsch synthesis,FTS)is considered a significant route for the production of liquid fuels and chemicals from nonpetroleum sources to meet worldwide demand.Conversion of CO_(2) with renewable H_(2) into valuable hydrocarbons is beneficial for reducing dependence on fossil fuels and mitigating the negative effects of high CO_(2) concentrations in the atmosphere.Iron‐based catalysts exhibit superior catalytic performance in both FTS and CO_(2) hydrogenation to value‐added hydrocarbons.The abundance and low cost of iron‐based catalysts also promote their wide application in CO_(x) hydrogenation.This paper provides a comprehensive overview of the significant developments in the application of iron‐based catalysts in these two fields.The active phases,promoter effect,and support of iron‐based catalysts are discussed in the present paper.Based on understanding of these three essential aspects,we also cover recent advances in the design and preparation of novel iron‐based catalysts for FTS and CO_(2) hydrogenation.Current challenges and future catalytic applications are also outlined. 展开更多
关键词 Iron‐based catalyst Fischer‐Tropsch synthesis CO_(2)hydrogenation PROMOTER Support Active phase
下载PDF
Iron-based catalysts encapsulated by nitrogen-doped graphitic carbon for selective synthesis of liquid fuels through the Fischer-Tropsch process 被引量:3
8
作者 Lei Tang Xiao‐Ling Dong +2 位作者 Wei Xu Lei He An‐Hui Lu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第12期1971-1979,共9页
Fischer‐Tropsch synthesis(FTS)has the potential to be a powerful strategy for producing liquid fuels from syngas if highly selective catalysts can be developed.Herein,a series of iron nanoparticle catalysts encapsula... Fischer‐Tropsch synthesis(FTS)has the potential to be a powerful strategy for producing liquid fuels from syngas if highly selective catalysts can be developed.Herein,a series of iron nanoparticle catalysts encapsulated by nitrogen‐doped graphitic carbon were prepared by a one‐step pyrolysis of a ferric L‐glutamic acid complex.The FeC‐800 catalyst pyrolyzed at 800°C showed excellent catalytic activity(239.4μmolCO gFe–1 s–1),high C5–C11 selectivity(49%),and good stability in FTS.The high dispersion of ferric species combined with a well‐encapsulated structure can effectively inhibit the migration of iron nanoparticles during the reaction process,which is beneficial for high activity and good stability.The nitrogen‐doped graphitic carbon shell can act as an electron donor to the iron particles,thus promoting CO activation and expediting the formation of Fe5C2,which is the key factor for obtaining high C5–C11 selectivity. 展开更多
关键词 Nitrogen doping Graphitic carbon ENCAPSULATION Iron‐based catalyst Fischer‐Tropsch synthesis
下载PDF
Bio-syngas Converting to Liquid Fuels over Co Modified Fe3O4-MnO2 Catalysts 被引量:2
9
作者 Jie Wang Ying Xiang +5 位作者 Yi-yuan Ding Yan-fei Xu Xiang-hui Kong Guang-yuan Ma Chanatip Samart Ming-yue Ding 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2019年第6期721-726,I0003,I0016-I0024,共16页
A bifunctional Co modified Fe3O4-Mn catalyst was prepared for Fischer-Tropsch synthesis (FTS). The influence of Co loading on the synergistic effect of Fe-Co as well as FTS performance over Fe1CoxMn1 catalysts was stu... A bifunctional Co modified Fe3O4-Mn catalyst was prepared for Fischer-Tropsch synthesis (FTS). The influence of Co loading on the synergistic effect of Fe-Co as well as FTS performance over Fe1CoxMn1 catalysts was studied. Incorporation of Co species into the Fe3O4-Mn catalyst promoted the reduction of iron oxides, increasing iron active sites during FTS. Moreover, the adding of Co species enhanced the electron transfer from Fe to Co metal, which strengthened the synergistic effect of Fe-Co, improving the catalytic performance. The Fe1CoxMn1 catalyst with higher Co loading promoted further the hydrogenation ability, favoring the shifting of the product distribution towards shorter hydrocarbons. Under optimized conditions of 280℃, 2.0 MPa and 3000 h-1, the highest yield of liquid fuels was obtained for the Fe1Co1Mn1 catalyst. 展开更多
关键词 FISCHER-TROPSCH Fe3O4-Mn Co loading Synergistic effect
下载PDF
Two-Bubble Class Model for Churn-Turbulent Regime in a Bubble Column Slurry Reactor of Fischer-Tropsch Synthesis 被引量:2
10
作者 吕朝晖 赵玉龙 赵亮富 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2001年第1期84-89,共6页
A model for a bubble column slurry reactor is developed based on the experiment of Rhenpreussen Koppers demonstration plant for slurry phase Fischer-Tropsch synthesis reported by Koelble et al. This model is applicabl... A model for a bubble column slurry reactor is developed based on the experiment of Rhenpreussen Koppers demonstration plant for slurry phase Fischer-Tropsch synthesis reported by Koelble et al. This model is applicable to the operation in the churn-turbulent regime and incorporates the information on the bubble size. The axial dispersion model is adopted to describe the flow characteristics of the Fischer-Tropsch slurry reactor. With the model developed, simulations are performed to identify the steady state behavior of a Fischer-Tropsch slurry reactor of commercial size. Predictions of the two-bubble class model is compared with that of the conventional single- bubble class model. The results show that under a variety of conditions, the two-bubble class model gives results different from those for the single-bubble class model. 展开更多
关键词 two-bubble class model Fischer-Tropsch synthesis slurry reactor
下载PDF
Full life cycle characterization strategies for spatiotemporal evolution of heterogeneous catalysts 被引量:1
11
作者 Renyang Zheng Zaiku Xie 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第12期2141-2148,共8页
The sustainable development of the chemical industry requires novel and efficient catalysts and catalytic processes,especially eco-friendly and intrinsically safe processes.The idea is to improve the selectivity,activ... The sustainable development of the chemical industry requires novel and efficient catalysts and catalytic processes,especially eco-friendly and intrinsically safe processes.The idea is to improve the selectivity,activity,and stability of the catalyst in an appropriate reactor.Therefore,it is of great academic and industrial significance to conduct in-situ characterization of a working catalyst while testing its catalytic performance.This is beneficial for a comprehensive study on the dynamic evolution of the catalyst structure under real conditions,deepening the understanding of the structure-performance relationship of catalysts,and providing a scientific basis for the development of future generation catalytic technology.Thus far,it is still a great challenge to realize full life cycle characterization of heterogeneous catalysts from catalyst formation and function to deactivation under real world conditions.In this mini review,we summarize the characterization strategies for heterogeneous catalysts,using zeolite,metal,and metal oxide catalysts as typical examples.The research strategies for the approximation of industrial conditions,multi-scale in-situ characterization devices,and computational modeling of realistic conditions should provide insight for the research and development of industrial catalysis. 展开更多
关键词 Heterogeneous catalysis In-situ characterization Methanol-to-olefins Fischer-Tropsch synthesis Propane dehydrogenation
下载PDF
Modeling of a slurry bubble column reactor for Fischer-Tropsch syn- thesis 被引量:2
12
《Journal of Coal Science & Engineering(China)》 2012年第1期88-95,共8页
On the basis of the global CO consumption rate model, the lumped product distribution model and the sedimenta- tion-dispersion model of a catalyst, a steady-state, one-dimensional mathematical model of the slurry bubb... On the basis of the global CO consumption rate model, the lumped product distribution model and the sedimenta- tion-dispersion model of a catalyst, a steady-state, one-dimensional mathematical model of the slurry bubble column reactor for Fischer-Tropsch synthesis were established. The mathematical simulation of the slurry bubble column reactor for Fischer-Tropsch synthesis was carried out under the following typical industrial operating conditions: temperature 230 ℃, pressure 3.0 MPa, gas flow 5x 105 m3/h, catalyst content in slurry phase 30%, reactor diameter 5.0 m and the composition of feed gas: y(H2)=0.60, y(CO)=0.30, y(N2)=0.10. The influences of operating pressure, temperature and re(HE)Ira(CO) in feed gas on the reactor's reaction performance were simulated. 展开更多
关键词 slurry bubble column reactor Fischer-Tropsch synthesis reactor model
下载PDF
Effect of alkali metals on the performance of CoCu/TiO_2 catalysts for CO_2 hydrogenation to long-chain hydrocarbons 被引量:4
13
作者 Zhibiao Shi Haiyan Yang +7 位作者 Peng Gao Xinqing Chen Hongjiang Liu Liangshu Zhong Hui Wang Wei Wei Yuhan Sun 3a] 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第8期1294-1302,共9页
CoCu/TiO_2 catalysts promoted using alkali metals(Li, Na, K, Rb, and Cs) were prepared by the homogeneous deposition-precipitation method followed by the incipient wetness impregnation method. The influences of the ... CoCu/TiO_2 catalysts promoted using alkali metals(Li, Na, K, Rb, and Cs) were prepared by the homogeneous deposition-precipitation method followed by the incipient wetness impregnation method. The influences of the alkali metals on the physicochemical properties of the CoCu/TiO_2 catalysts and the catalytic performance for CO_2 hydrogenation to long-chain hydrocarbons(C_(5+))were investigated in this work. According to the characterization of the catalysts based on X-ray photoelectron spectroscopy, X-ray diffraction, CO_2 temperature-programmed desorption(TPD), and H_2-TPD, the introduction of alkali metals could increase the CO_2 adsorption and decrease the H_2 chemisorption, which could suppress the formation of CH_4, enhance the production of C_(5+), and decrease the hydrogenation activity. Among all the promoters, the Na-modified CoCu/TiO_2 catalyst provided the maximum C_(5+) yield of 5.4%, with a CO_2 conversion of 18.4% and C_(5+) selectivity of42.1%, because it showed the strongest basicity and a slight decrease in the amount of H_2 desorption;it also exhibited excellent catalytic stability of more than 200 h. 展开更多
关键词 Carbon dioxide hydrogenation Long-chain hydrocarbons Carbon dioxide Fischer-Tropsch synthesis Alkali metal promoters Cobalt-coper based catalysts
下载PDF
Effect of cobalt loading on reducibility, dispersion and crystallite size of Co/Al_2O_3 Fischer-Tropsch catalyst 被引量:1
14
作者 熊海峰 张煜华 +1 位作者 李金林 古映莹 《Journal of Central South University of Technology》 2004年第4期414-418,共5页
Co/Al2O3 Fischer-Tropsch synthesis catalysts with different cobalt loadings were prepared using incipient wetness impregnation method. The effects of cobalt loading on the properties of catalysts were studied by means... Co/Al2O3 Fischer-Tropsch synthesis catalysts with different cobalt loadings were prepared using incipient wetness impregnation method. The effects of cobalt loading on the properties of catalysts were studied by means of X-ray diffraction (XRD), temperature programmed reduction (TPR), hydrogen temperature programmed desorption (H2-TPD) and O2 titration. Co-support compound formation can be detected in catalyst system by XRD. For the Co/Al2O3 catalysts with low cobalt loading, CoAl2O4 phase appears visibly. Two different reduction regions can be presented for Co/Al2O3 catalysts, which belong to Co3O4 crystallites (reduction at 320 ℃) and cobalt oxide-alumina interaction species (reduction at above 400 ℃). Increasing Co loading results in the increase of Co3O4 crystallite size. The reduced Co/Al2O3 catalysts have two adsorption sites, and cobalt loading greatly influences the adsorption behavior. With the increase of cobalt loading, the amount of low temperature adsorption is increased, the amount of high temperature adsorption is decreased, and the percentage reduction and cobalt crystallite size are increased. 展开更多
关键词 Fischer-Tropsch synthesis cobalt/alumina catalyst temperature programmed reduction hydrogen temperature programmed desorption
下载PDF
Diffusion and Reaction Model of Catalyst Pellets for Fischer-Tropsch Synthesis 被引量:1
15
作者 Wu Jianmin Sun Qiwen +1 位作者 Zhang Zongsen Pang Lifeng 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2013年第4期77-86,共10页
The diffusion and reaction phenomenon in a Fe-based catalyst pellet for Fischer-Tropsch synthesis was studied. It was considered that the pores of catalyst pellets were full of liquid wax under Fischer-Tropsch synthes... The diffusion and reaction phenomenon in a Fe-based catalyst pellet for Fischer-Tropsch synthesis was studied. It was considered that the pores of catalyst pellets were full of liquid wax under Fischer-Tropsch synthesis conditions. The re- actants diffused from the bulk gas phase to the external surface of the pellet, and then the reactants diffused through the wax inside the pellet and reacted on the internal surface formed along the pore passages of the pellet. On the basis of reaction kinetics and double a-ASF product distribution model, a diffusion and reaction model of catalyst pellet was established. The effects of diffusion and reaction interaction in a catalyst pellet, the bulk temperature, the reaction pressure and the pellet size on the reactivity were further investigated. The relationship between the internal diffusion effectiveness factor of spherical catalyst pellet and the Thiele modulus were also discussed. The bulk temperature and pellet size have significant effects on the reactivity, while the pressure shows only a slight influence on the reactivity. The internal diffusion effectiveness factor decreases with an increasing Thiele modulus. 展开更多
关键词 Fischer-Tropsch synthesis diffusion and reaction catalyst pellet internal diffusion effectiveness factor
下载PDF
Overview of Fischer-Tropsch Synthesis in Slurry Reactors
16
作者 丁百全 李涛 +1 位作者 A.A.C.M.Beenackers G.P.vanderLaan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2000年第3期255-266,共12页
A brief review of Fischer-Tropsch synthesis specially in slurry reactors is presented, covering reaction kinetics, activity and selectivity of catalysts, product distribution, effects of process parameters, mass trans... A brief review of Fischer-Tropsch synthesis specially in slurry reactors is presented, covering reaction kinetics, activity and selectivity of catalysts, product distribution, effects of process parameters, mass transfer and solubility of gas. Some important aspects of further research are proposed for improving both theories and production. 展开更多
关键词 Fischer-Tropsch synthesis slurry reactor KINETICS CATALYST mass transfer
下载PDF
Getting and X-Ray Diffraction Analysis of the Microsphere Magnetic Catalyst of the Thorium-Uranium Catalyst for Fischer-Tropsch Synthesis
17
作者 Aibassov Erkin Zhakenovich Yemelyanova Valentina Stepanovna Schakieva Tatyana Tussupbaev Nessipbay Imanbekov Kylysh Bulenbayev Maxat Blagikh Evgeniy 《Journal of Chemistry and Chemical Engineering》 2015年第2期145-148,共4页
We first obtained by impregnating of the microsphere magnetic catalyst with salts of Thorium and of Uranium and examined the X-ray thorium-uranium catalyst for Fischer-Tropsch synthesis. Introduction in catalyst addit... We first obtained by impregnating of the microsphere magnetic catalyst with salts of Thorium and of Uranium and examined the X-ray thorium-uranium catalyst for Fischer-Tropsch synthesis. Introduction in catalyst additive thorium and uranium ions and manganese improves the thermal stability of the magnetic microsphere catalyst. 展开更多
关键词 THORIUM uranium catalyst Fischer-Tropsch synthesis catalysis.
下载PDF
CFHL Technology for Hydro-upgrading of Syncrude from Low-Temperature Fischer-Tropsch Synthesis Successfully Applied on the First in China One-Million-Ton-Class Indirect Coal Liquefaction Unit
18
《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2015年第4期45-45,共1页
On August 25,2015 the CFHL technology for hydroupgrading of syncrude obtained from low-temperature Fischer-Tropsch synthesis had been successfully applied on the first in China 1.0 Mt/a indirect coal liquefaction unit.
关键词 Fischer upgrading Petroleum butadiene feedstock propylene petrochemical steam realized naphtha
下载PDF
Photocatalytic conversion of CO to fuels with water by B-doped graphene/g-CN heterostructure 被引量:5
19
作者 Li Shi Zhaobo Zhou +3 位作者 Yehui Zhang Chongyi Ling Qiang Li Jinlan Wang 《Science Bulletin》 SCIE EI CSCD 2021年第12期1186-1193,M0003,共9页
Photocatalytic reduction of carbon monoxide(CO)is a promising route to the production of high-value chemicals and fuels,as a supplement to high energy-input Fischer-Tropsch synthesis(FTS)and a key step in direct photo... Photocatalytic reduction of carbon monoxide(CO)is a promising route to the production of high-value chemicals and fuels,as a supplement to high energy-input Fischer-Tropsch synthesis(FTS)and a key step in direct photo/electro-reduction CO_(2) to multi-carbon products.However,many current research efforts for high-efficiency FTS/CO_(2) reduction mainly focus on the metal-based catalysts,while metal-free and solar-driven photocatalysts are rarely explored.Here,by means of Lewis acid sites,a metal-free composite photocatalyst for CO reduction,namely boron(B)doped-graphene/g-C_(3)N_(4) heterostructure,is proposed.First-principles calculations show that the dopants(B)as catalytic sites can effectively capture and activate CO molecules and reduce CO to CH_(3)OH and CH_(4) in different doping content.It is worth noting that C_(2) products,i.e.,C_(2)H_(5)OH,can be produced with low free energy barriers on paradoped graphene/g-C_(3)N_(4).Meanwhile,the competitive hydrogen evolution reaction(HER)can be greatly suppressed,leading to the high selectivity of CO reduction.Moreover,the formation of a built-in electric field in heterostructure enhances the separation of photogenerated electrons and holes,which further accelerates the transmission of photogenerated electrons to the catalytic sites and improves the reaction efficiency.Overall,this work not only proposes a new strategy from a new perspective to solve problems of high energy consumption and low selectivity of FTS,but also provides a tandem strategy to solve problems of CO_(2) to multi-carbon products. 展开更多
关键词 PHOTOCATALYST Fischer-Tropsch synthesis 2D heterostructure First-principles calculations
原文传递
Theoretical study of the strain effects on CO activation by Fe_(2)C confined with graphene
20
作者 ZHU Jialiang LI Zhe +2 位作者 ZHANG Yuhua LI Yongxiu LI Jinlin 《分子科学学报》 CAS 2024年第3期233-238,共6页
The intrinsic strains at the confinement interface of iron carbide with graphene play important roles in the catalytic Fischer-Tropsch synthesis.In this study,we performed theoretical study of the biaxial strain effec... The intrinsic strains at the confinement interface of iron carbide with graphene play important roles in the catalytic Fischer-Tropsch synthesis.In this study,we performed theoretical study of the biaxial strain effects on the CO adsorption and dissociation on the Fe_(2)C(121)surface covered by graphene(Fe_(2)C@graphene).By varying the lattice strains within a range of±5%,the apparent energy barriers(E_(a,app))correlate with the adsorption energies(E_(ad))in nonlinear scaling relations for the direct and H-assisted CO dissociation at the Fe_(2)C active sites,which is normal Br∅nsted-Evans-Polanyi relation for those at the graphene sites.The nonlinear scaling relations can be interpreted by the strain effects on the confinement distances in the adsorption and transition states.This study provides a deep understanding of the intrinsic strain effects of Fe_(2)C@graphene for CO activation. 展开更多
关键词 strain effect iron carbide confinement effect graphene Fischer-Tropsch synthesis
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部