Reactions of n-Heptane and Methylcyclopentane over an Oxygen-Modified Molybdenum Carbide Catalyst. Study of Coke Formation, Catalyst Deactivation, and Regeneration
Reactions of n-Heptane and Methylcyclopentane over an Oxygen-Modified Molybdenum Carbide Catalyst. Study of Coke Formation, Catalyst Deactivation, and Regeneration
复制标题
正庚烷和甲基环戊烷在氧改性碳化钼催化剂上的反应。
DOI：
10.1021/ie00043a012
复制
发表时间：
1995
影响因子：
4.2
通讯作者：
M. Ledoux
中科院分区：
文献类型：
--
作者：
C. Pham‐Huu;A. York;M. Benaissa;P. D. Gallo;M. Ledoux
在氧化处理之后，碳化钼是用于正庚烷异构化的活性和非常选择性的催化剂。在选择用于工业应用的催化剂时的一个重要参数是其对由焦炭形成引起的失活的抗性，焦炭形成可由环状分子的存在引起。在这项工作中，甲基环戊烷（MCP）的氧改性碳化钼催化剂的失活的影响进行了研究。已经发现，在纯MCP存在下催化剂失活，并且在MCP下反应后获得较低的庚烷异构化活性。TEM分析表明，积炭是催化剂失活的主要原因。还已经表明，当MCP反应时增加总压力导致催化剂失活的大幅降低，并且庚烷异构化可以在该失活样品上进行，而活性仅损失很小。此外，催化剂可以在空气中完全再生。
After an oxidative treatment, molybdenum carbide is an active and very selective catalyst for the isomerization of n-heptane. An important parameter in the choice of a catalyst for application in industry is its resistance to deactivation by coke formation, which can be caused by the presence of cyclic molecules. In this work, a study of the effect of methylcyclopentane (MCP) on the deactivation of the oxygen-modified molybdenum carbide catalyst has been performed. It has been found that the catalyst deactivates in the presence of pure MCP and that a lower activity for heptane isomerization is obtained after the reaction under MCP. TEM showed that coke formation is the cause of the deactivation. It has also been shown that increasing the total pressure when the MCP is reacted leads to a large decrease in the catalyst deactivation and that heptane isomerization can be carried out over this deactivated sample with only a small loss in activity. Further, the catalyst can be totally regenerated in air.