Modelling of n-hexadecane hydroisomerization and hydrocracking reactions on a Mo/Hβ-alumina Bi-functional catalyst, using the single event concept
Modelling of n-hexadecane hydroisomerization and hydrocracking reactions on a Mo/Hβ-alumina Bi-functional catalyst, using the single event concept
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DOI：
10.1016/j.cattod.2004.07.037
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发表时间：
2004-11-24
期刊：
影响因子：
5.3
通讯作者：
Baltanas, MA
中科院分区：
文献类型：
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作者：
Chavarría, JC;Ramírez, J;Baltanas, MA
在具有弱脱氢功能的Mo/ hβ -氧化铝双功能催化剂上对长链石蜡十六烷进行了加氢裂化反应。通过异构化选择性分析发现，该体系的行为偏离了理想的加氢裂化条件。为了实现该系统的单事件概念，到目前为止，该概念仅适用于理想加氢裂化假设有效的系统，开发了一个混合模型，其中包括酸位上的反应不决定速率的更一般情况。该模型被称为单事件-集总参数混合（SELPH）模型，因为它考虑了用单事件概念在酸位上发生的反应的基本速率常数，以及在金属位上发生的反应的集总速率常数。对533 K时的动力学系数进行了估计，计算值与实验值吻合较好。(C) 2004 Elsevier B.V.版权所有
Hydrocracking of a long chain paraffin, hexadecane, was carried out on a Mo/Hbeta-alumina bi-functional catalyst with a weak dehydrogenating function. It was found through an isomerization selectivity analysis that the behavior of the system is away from ideal hydrocracking conditions. To implement for this system the single event concept, until now applied only to systems for which the ideal hydrocracking assumption was valid, a hybrid model that includes the more general case in which reactions on the acid sites are not rate determining was developed. This model was called the single-event-lumped-parameter hybrid (SELPH) model, for it considers fundamental rate constants for the reactions that take place on the acid sites using the single event concept, and lumped rate constants for the reactions on the metal sites. The kinetic coefficients at 533 K were estimated and the agreement between the calculated and experimental data was satisfactory. (C) 2004 Elsevier B.V. All rights reserved.