期刊文献+

卟啉氧钒在均一孔结构模型催化剂中的扩散

Diffusion of Vanadyl Octaethylporphyrin in Well-Defined and Uniform Pore-Structure Model Catalyst
在线阅读 下载PDF
导出
摘要 利用孔结构均一、孔隙率和曲折因子固定的CoMo/Al_2O_3/SiO_2模型催化剂,研究了加氢催化反应条件下渣油加氢脱金属过程中金属有机化合物八乙基卟啉氧钒(VO)-OEP)在模型催化剂孔道中的扩散过程。结果表明,在反应压力6.0 MPa、反应温度270~330℃的加氢反应条件下,VO-OEP的有效扩散系数(D_e)范围为0.45×10^(-10)~2.33×10^(-10)m^2/s,且其值随着温度升高以及催化剂孔径的增大而增加,并估算出反应条件下VO-OEP的体相扩散系数,指出由此法测得的体相扩散系数比采用Wilke-Chang和Stokes-Einstein等经验公式估算而得的体相扩散系数更接近于反应条件下的分子体相扩散系数。 The intraparticle diffusion of vanadyl 2, 3, 7, 8, 12, 13, 17, 18-octaethylporphyrin (VO-OEP) was investigated under hydrodemetallization reaction of heavy oil over well-defined and uniform pore-structure (WDUPS) CoMo/AI203/SiO2 model catalysts. Based on the intrinsic reaction rate constant and apparent reaction rate constant, the intraparticle effective diffusivity (De) of VO-OEP was calculated, which ranged from 0.45× 10 10 to 2.33 × 10-10 m2/s under the reaction conditions of 270--330℃ and 6.0 MPa. Higher reaction temperature and larger pore size of catalyst led to larger De of VO-OEP. The bulk diffusivity of VO-OEP under reaction condition was obtained by extrapolation method based on kinetic data. The bulk diffusivity values thus obtained were more approximate to the reaction situation compared to those estimated by Wilke-Chang and Stokes- Einstein formulas.
出处 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2014年第2期266-272,共7页 Acta Petrolei Sinica(Petroleum Processing Section)
基金 中国石油天然气集团公司项目(10-01A-05-01-04)资助
关键词 孔内扩散有效系数 本征扩散系数 体相扩散系数 均一孔结构催化剂 intraparticle effective diffusivity intrinsic diffusivity bulk diffusivity uniform porestructure catalyst
作者简介 陈爱城,男,博士研究生,从事催化剂工程研究 陈胜利,男,教授,博士,从事催化剂工程、化工新材料等方面的研究;Tel:010—89733396:Email:slchen@cup.edu.cn
  • 相关文献

参考文献33

  • 1CHEN Z T. XU C M. GAOJ S. et al. Hindered diffusion of residue narrow cuts through polycarbonate membranes[J]. AICh[J]. 2010. 56(8): 2030-2038.
  • 2SANE R C. TSOTSIS T T. WEBSTER I A. et al. Studies of asphaltene diffusion and structure and their implications for resid upgrading[J]' Chemical Engineering Science. 1992.47(9-11): 2683-2688.
  • 3BALTUS R E. ANDERSONJ L. Hindered diffusion of asphaltenes through microporous membranes[J]' Chemical Engineering Science. 1983. 38 (12): 1959-1969.
  • 4LIU Z Y. CHEN S L. GE XJ. et al. Measurement of diffusion coefficient of heavy oil in fluidized catalytic cracking (FCC) catalysts[J]. Energy & Fuels. 2010. 24(5): 2825-2829.
  • 5TAYAKOUT M. FERREIRA C. ESPINAT D. et al. Diffusion of asphaltene molecules through the pore structure of hydroconversion catalysts[J]' Chemical Engineering Science. 2010. 65(5): 1571-1583.
  • 6刘子媛,陈胜利,董鹏,高金森,葛秀军.球形SiO2模型催化剂的制备及在渣油扩散系数测定中的应用[J].石油学报(石油加工),2009,25(3):363-369. 被引量:4
  • 7TSAI C H. MASSOTH FE. LEE S Y. et al. Effects of solvent and solute configuration on restrictive diffusion in hydrotreating' catalysts[J]. Industrial & Engineering Chemistry Research. 1991. 30(1): 22-28.
  • 8WANG G. CHEN Z T. LAN X Y. et al. Restricted diffusion of residual molecules in catalyst pores under reactive conditions[J]. Chemical Engineering Science. 2011.66(6): 1200-1211.
  • 9TSAI M C. CHEN Y W. LI C. Restrictive diffusion under hydrotreating reactions of heavy residue oils in a trickle bed reactor[J]' Industrial & Engineering Chemistry Research. 1993. 32(8): 1603-1609.
  • 10LEE S Y. SEADERJ D. TSAI C H. et al. Restrictive diffusion under catalytic hydroprocessing conditions[J]. Industrial & Engineering Chemistry Research. 1991. 30 (1): 29-38.

二级参考文献24

  • 1韩生,程型国,马书杰,任天辉.紫外光照射对环烷基高压加氢橡胶油性质的影响[J].石油商技,2004,22(4):9-11. 被引量:3
  • 2周浪,李俊,丁军平,赵立英,刘长生.纳米二氧化硅模板的制备[J].化学与生物工程,2005,22(8):19-21. 被引量:3
  • 3祁彦平,陈胜利,董鹏,徐克琪,申宝剑.新型孔结构渣油催化裂化催化剂[J].燃料化学学报,2006,34(6):685-689. 被引量:30
  • 4王仁安,胡云翔,许志明,苏桐.超临界流体萃取分馏法分离石油重质油[J].石油学报(石油加工),1997,13(1):53-59. 被引量:59
  • 5KYRIACOU K C,SIVARAMAKRISHNA v v,BALTUS R E.et al.Measurement of diffusion coefficients of oil residual fractions using porous membranes[J].Fuel,1988,67(1):15-18.
  • 6HAKULI A K,IMHOF P,KUEHLER C W.Understanding FCC catalysts architecture and accessibility[C]//The Netherlands:Proceedings of the Akzo Nobel ECO-MAGIC Symposium,Noordwijk,2001:paper F-4.
  • 7FALCO M,MORGADO E,AMADEO N,et al.Accessibility in alumina matrices of FCC catalysts[J].Applied Catalysis A:General,2006,315:29-34.
  • 8XIA Y N,GATES B,YIN Y D,et al.Monodispersed colloidal spheres:Old materials with new applications[J].Adv Mater,2000,12(10):693-713.
  • 9周倩.利用胶体组装制备有序微纳结构新材料的研究[D].北京:中国石油大学,2005.
  • 10OSTLUND J A,ANDERSON S I,NYDEN M.Studies of asphahenes by the use of pulsed field gradient spin echo NMR[J].Fuel,2001,80:1529-1533.

共引文献51

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部