Abstract

Published data on hydrodesulfurization and hydrodenitrogenation of model petroleum compounds in the presence of molybdenum and tungsten phosphides are analyzed. The majority of papers in which these catalysts are compared to traditional sulfide catalysts demonstrate higher activity of the phosphide catalysts. The influence exerted on the activity of phosphide catalysts in these processes by the feed composition (presence of sulfur- and nitrogen-containing compounds), catalyst synthesis conditions and active phase content, reaction conditions, and promoter is described. When performing the synthesis at high temperatures or using large amounts of the active phase deposited onto an Al-containing support, the catalyst activity can decrease owing to the formation of AlPO₄. The promotion of molybdenum and tungsten phosphides with nickel or cobalt enhances the catalyst activity. The major cause of phosphide deactivation is the presence of nitrogen-containing compounds in the feed, whereas the presence of sulfur-containing compounds, on the contrary, in most cases leads to an increase in the catalyst activity owing to the formation of the phosphosulfide phase.

中文翻译：

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钼和磷化钨在石油化合物加氢脱硫和加氢脱氮中的应用

摘要

对已发表的有关模型石油化合物在钼和磷化钨存在下的加氢脱硫和加氢脱氮的数据进行了分析。大多数将这些催化剂与传统硫化物催化剂进行比较的论文都表明磷化物催化剂具有更高的活性。描述了这些过程中进料组成（含硫和含氮化合物的存在）、催化剂合成条件和活性相含量、反应条件和促进剂对磷化物催化剂活性的影响。当在高温下进行合成或使用沉积在含Al载体上的大量活性相时，催化剂活性会由于AlPO ₄的形成而降低。钼和钨的磷化物与镍或钴的促进增强了催化剂活性。磷化物失活的主要原因是进料中存在含氮化合物，而相反，在大多数情况下，含硫化合物的存在会由于形成磷硫化物相而导致催化剂活性增加。