Kinetics of the Oxidative Dehydrogenation of Isobutance over Cr2o3／La2(CO3)3

Kinetics of the Oxidative Dehydrogenation of

Isobutance over Cr2o3／La2（CO3）3

YanpingSun;TraceyA.Robson;等

【期刊名称】《天然气化学杂志：英文版》 【年(卷),期】2002(011)001

【摘要】The oxidative dehydrogenation (ODH) of isobutane over Cr2o3/La2(CO3)3 has been investi-gated in a low-pressure Kundsen cell reactor,under conditions where the kinetics of the primary reaction steps can be accurately determined .By heating the catalyst at a constant rate from 150-300℃ ,temper-ature fluctuations due to non-equilibrium adsorption are minimized ,The evolved gas profiles show that ODH to isobutene and water is a primary reaction pathway,while carbon dioxide ,which forms from the catalyst during reaction,is the only other product,This CO2 evolution may enhance the activity of the catalyst ,Isobutene formation proceeds with the participation of lattice oxygen from the Cr2O3/La2(CO3)3 catalyst The intrinsic Arrhenius rate constant for the ODH of isobutane is k(s-1)=1011.5±2.2exp{-((55±5)-△Hads kJmol-1)/RT} The small pre-exponential factor is expected for a concerted mechanism and for such a catalys with a small surface area and limited porosity. 【总页数】9页(P.70-78)

【关键词】Cr2o3／La2（CO3）3;异丁烷;碳酸镧;氧化铬;催化动力学;氧化脱氢;

催化剂

【作者】YanpingSun;TraceyA.Robson;等 【

作

者

单

位

】

SchoolofBiological,Biomedical

＆

MolecularSciences,UniversityofNewEngloand,Armidale,NSW,2351,Australia;SchoolofBiological,Biomedical

＆

MolecularSciences,UniversityofNewEngloand,Armidale,NSW,2351,Australia

【正文语种】英文 【中图分类】O623.11 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_journal-natural-gas-chemistry-english_thesis/0201268290537.html 【相关文献】

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