文献类型：期刊文献

中文题名：内扩散对裂解汽油中噻吩加氢脱硫反应的影响

英文题名：Effect of internal diffusion on thiophene hydrodesulfurization in pyrolysis gasoline

作者：杨栋[1];周志明[1];程振民[1];袁渭康[1]

机构：[1]华东理工大学,化学工程联合国家重点实验室,联合化学反应工程研究所,上海200237

年份：2008

卷号：36

期号：4

起止页码：437

中文期刊名：燃料化学学报

外文期刊名：Journal of Fuel Chemistry and Technology

收录：CSTPCD;;EI(收录号：20084211647403);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：噻吩;加氢脱硫;反应动力学;内扩散;效率因子

外文关键词：thiophene; hydrodesulfurization; reaction kinetics; internal diffusion; effectiveness factor

摘要：采用等温积分管式反应器,在543 K^623 K、2.5 MPa^3.5 MPa、氢油摩尔比2~4的条件下,对Co-Mo/Al2O3催化剂上噻吩加氢脱硫反应的本征和宏观动力学进行了研究。运用Langmuir-Hinshelwood机理,推导出了噻吩加氢脱硫反应的动力学模型,并对模型参数进行了估值。统计检验和实验数据验证了动力学模型的合理性。通过Thiele模数的计算以及对新鲜和失活催化剂的孔径分布与碳含量的分析和比较表明,反应过程受催化剂内扩散的影响。利用本征和宏观反应速率方程计算得到了催化剂内扩散效率因子,其数值随反应温度的升高而明显减小,随氢油摩尔比的增加变化不明显。
The intrinsic and global kinetics of thiophene hydrodesulfurization over Co-Mo/Al2O3 catalysts were studied in an isothermal integral tubular reactor under the conditions of 543 K - 623 K, 2.5 MPa - 3.5 MPa and H2/oil mol ratio 2- 4. The kinetic model was derived from the Langmuir-Hinshelwood mechanism and the kinetic parameters involved were estimated based on the experimental data. The kinetic model was verified by comparison of the experimental and predicted data as well as by statistical test. Moreover, the calculated Thiele modulus together with the comparison of the pore size distribution and the carbon content of the fresh catalyst with those of the deactivated catalyst revealed that the effect of the internal diffusion on the overall reaction rate was evident. The effectiveness factor was subsequently calculated from the intrinsic and global rates obtained above, and it showed that the effectiveness factor decreased dramatically with increased temperature, while the effect of H2/oil mol ratio was not evident.