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内扩散行为对F-T合成反应过程影响的研究 被引量:1

Effect of intraparticle diffusion on F-T synthesis
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摘要 选用Co/ZrO2催化剂,通过改变催化剂颗粒径,在积分固定床反应器上研究了内扩散行为对F-T合成反应过程的影响。以表观活化能、烯/烷比的变化等为依据,考察了内扩散行为对F-T合成反应历程、催化剂活性及产物选择性的影响。催化剂颗粒径不同,内扩散限制程度会发生相应变化。实验结果表明,不同程度的内扩散限制条件下,F-T合成反应历程会有较大差异。当反应开始后,颗粒内孔从"干"到"湿",不同粒径的催化剂颗粒上气态烯/烷比变化均呈"U"型趋势。在固定床反应器上,增加空速通常会有CH4选择性升高、气态烯/烷比略有增加的现象,这是由于内扩散限制未完全消除的缘故。 The effect of intraparticle diffusion on the performance of Co/ZrO2 F-T catalyst was investigated.According to the change of apparent activation energy,the reaction pathway might vary while changing the extent of diffusion limitation.After catalysts were activated,the inner pores would be filled with F-T product gradually.The ratio of gaseous olefin to paraffin followed the "U" type trend.The selectivity to CH4 increased with the increase of GHSV.And the ratio of gaseous olefin to paraffin also increased slightly with the increase of GHSV due to the intraparticle diffusion limitation.
出处 《燃料化学学报》 EI CAS CSCD 北大核心 2010年第5期588-593,共6页 Journal of Fuel Chemistry and Technology
基金 国家重点基础研究发展规划(973计划 2005CB221400)
关键词 F-T合成 固定床 内扩散 选择性 烯/烷比 F-T synthesis fixed-bed intraparticle diffusion selectivity olefin/paraffin
作者简介 陈从标(1982-),男,硕士研究生,化学工程专业。 联系作者:孙予罕,Tel:0351-4064128;E-mail:yhsun@sxicc.ac.cn。
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  • 1POST M F M, VANT HOOG A C, MINDERHOUD J K, SIE S T. Diffusion limitations in Fischcr-Tropsch catalysts[J]. AIChE J, 1989,35(7) : 1107-1114.
  • 2MADON R J, IGLESIA E. Hydrogen and CO intrapellet diffusion effects in ruthenium-catalyzed hydrocarbon synthesis[ J]. J Catal, 1994, 149 (2) : 428-437.
  • 3IGLESIA E. Design, synthesis, and use of cobalt-based Fischer-Tropsch synthesis catalysts[ J ]. Appl Catal A, 1997, 161(1/2) : 59-78.
  • 4KUIPERS E W, VINKENBURG I H, OOSTERBEEK H. Chain length dependence of [ alpha l-olefin readsor-ption in Fischer-Tropsch synthesis [J]. J Catal, 1995, 152(1): 137-146.
  • 5ZHAN X, DAVIS B H. Assessment of internal diffusion limitation on Fischer-Tropsch product distribution[ J]. Appl Catal A, 2002, 236 (1/2) : 149-161.
  • 6CHEN J, SUN Y H. The structure and reactivity of coprecipitated Co-ZrO2 catalysts for Fischer-Tropsch synthesis[ J ]. Stud Surf Sci Catal, 2004, 147 : 277-283.
  • 7Van DER LAAN G P, BEENACKERS A A C M. Kinetics and selectivity of the Fischer-Tropsch synthesis: A literature review[J]. Catal Rev, 1999, 41(3/4) : 255-318.
  • 8KEYSER M J, EVERSON R C, ESPINOZA R L. Fischer-Tropsch kinetic studies with cobalt-manganese oxide catalysts[J]. Ind Eng Chem Res, 2000, 39 ( 1 ) : 48-54.
  • 9WANG Y N, MAW P, LU Y J, YANG J, XU Y Y, XIANG H W, LI Y W, ZHAO Y L, ZHANG B-J. Kinetics modelling of Fischer-Tropsch synthesis over an industrial Fe-Cu-K catalyst [ J ]. Fuel, 2003, 82 (2) : 195-213.
  • 10王逸凝,李永旺,徐元源,赵玉龙,张碧江.基于详细机理动力学的费-托合成单颗粒催化剂模拟Ⅱ.扩散反应行为及活性分布[J].催化学报,2001,22(1):40-44. 被引量:7

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共引文献6

同被引文献18

  • 1刘国际,姚佩芳,朱炳辰.孔结构对铜基甲醇合成催化剂宏观反应速率的影响Ⅰ.未中毒颗粒催化剂[J].燃料化学学报,1994,22(2):183-188. 被引量:3
  • 2CI Zhi-min(慈志敏).Study on Cu-based catalysts for methanol synthesis from CO hydrogenation(一氧化碳加氢合成甲醇用铜基催化剂的研究)[D].Chengdu(成都):Sichuan University(四川大学),2006.
  • 3Waugh K C.Methanol synthesis[J].Catal Lett,2012,142(10):1153-1166.
  • 4Graaf G H,Scholtens H,Stamhuis E J,et al.Intra-particle diffusion limitations in low-pressure methanol synthesis[J].Chem Eng Sci,1990.45(4):773-784.
  • 5Szeifert F,Arva P,Nagy D.Effects of pore diffusion on the synthesis of methanol[J].Chem Eng Comm,1989,76(1):157-167.
  • 6TANG Qian-lin,HONG Qi-jun,LIU Zhi-pan.CO2 fixation into methanol at Cu/Zr O2 interface from first principles kinetic Monte Carlo[J].J Catal,2009,263(1):114-122.
  • 7Edward M C.Kinetic model for alcohol synthesis over a promoted Cu/Zn O/Cr2O3 catalyst[J].Ind Eng Chem Res,1992,31(3):792-803.
  • 8Grabow L C,Mavrikakis M.Mechanism of methanol synthesis on Cu through CO2 and CO hydrogenation[J].ACS Catal,2011,1(4):365-384.
  • 9Youngs T G A,Haq S,Bowker M.Formic acid adsorption and oxidation on Cu(110)[J].Sur Sci,2008,602(10):1775-1782.
  • 10YANG Jia,QI Yan-ying,ZHU Jun,et al.Reaction mechanism of CO activation and methane formation on Co Fischer-Tropsch catalyst:A combined DFT,transient,and steady-state kinetic modeling[J].J Catal,2013,308(12):37-49.

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