Deactivation kinetics of sulfur poisoning of nickel catalyst during ethylbenzene hydrogenation

doi:10.3969/j.issn.0438-1157.2012.10.018

CIESC Journal ›› 2012, Vol. 63 ›› Issue (10): 3131-3137.DOI: 10.3969/j.issn.0438-1157.2012.10.018

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Deactivation kinetics of sulfur poisoning of nickel catalyst during ethylbenzene hydrogenation

ZHENG Jinbao¹, ZHAO Yusheng², YI Xiaodong¹, LI Qingbiao¹, CHEN Binghui¹, FANG Weiping¹

1. School of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
2. Research Institute of Petroleum and Petrochemicals, CNPC, Beijing 100195, China

Received:2012-02-27 Revised:2012-07-04 Online:2012-10-05 Published:2012-10-05
Supported by:
supported by the National Basic Research Program of China(2010CB226903)and the National Natural Science Foundation of China(21073147,20973140).

镍基芳烃加氢催化剂硫中毒的失活动力学

郑进保¹, 赵愉生², 伊晓东¹, 李清彪¹, 陈秉辉¹, 方维平¹

1. 厦门大学化学化工学院, 福建厦门 361005;
2. 中国石油天然气股份有限公司石油化工研究院, 北京 100195

通讯作者: 方维平
作者简介:方维平,郑进保(1982- ),男,博士,工程师。
基金资助:
国家重点基础研究发展计划项目(2010CB226903);国家自然科学基金项目(21073147,20973140)。

Abstract

Abstract: Based on the current power-kinetic model for catalyst deactivation,the apparent activity factor usually in a non-separable form was derived by taking the non-uniform distribution of catalyst active sites into account.Combined with the relatively comprehensive conversion relationship reported previously,a model correlating conversion with reaction time was proposed.Its validity was verified by fitting experimental data from ethylbenzene hydrogenation with Ni-B/SiO₂ catalyst in the presence of thiophene.The results showed that the model with predictive capability could describe the nickel catalyst deactivation behavior,and the model parameters were endowed with physical meaning.

Key words: poisoning, deactivation, reaction kinetics, aromatics hydrogenation, fuel oil

摘要： 将某一时刻催化剂表面上活性中心数目与初始时刻活性中心数目之比定义为催化剂表观活性因子,并认为此活性因子包含在主催化反应速率系数的指前因子中。考虑活性中心在催化剂表面分布的不均匀性,在现有级数型失活动力学模型基础上,经推导得到表观活性因子的具体表达式及其极限式,该式在一般情况下为不可分。最后,结合之前报道的具有较高普适性的反应转化率方程式,得到催化反应转化率与运转时间的关系方程,并以Ni-B/SiO₂催化剂在噻吩存在下芳烃加氢反应为例加以验证。结果表明,所提出的失活动力学表达式可以较好地描述镍基催化剂硫中毒的行为,方程参量具有物理意义,方程可以较精确地拟合实验数据。

关键词: 中毒, 失活, 反应动力学, 芳烃加氢, 燃料油

CLC Number:

TQ426
O643.3

ZHENG Jinbao, ZHAO Yusheng, YI Xiaodong, LI Qingbiao, CHEN Binghui, FANG Weiping. Deactivation kinetics of sulfur poisoning of nickel catalyst during ethylbenzene hydrogenation[J]. CIESC Journal, 2012, 63(10): 3131-3137.

郑进保, 赵愉生, 伊晓东, 李清彪, 陈秉辉, 方维平. 镍基芳烃加氢催化剂硫中毒的失活动力学[J]. 化工学报, 2012, 63(10): 3131-3137.

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Deactivation kinetics of sulfur poisoning of nickel catalyst during ethylbenzene hydrogenation

镍基芳烃加氢催化剂硫中毒的失活动力学

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