化工进展Issue(1)：138-144,7.DOI:10.16085/j.issn.1000-6613.2016.01.018
USY 分子筛表面酸性的调变及其在催化脱除芳烃中烯烃的应用
Surface acid modification of zeolite and its application in removal of olefins in aromatics
黄朝晖 1刘乃旺 2姚佳佳 2濮鑫 2施力2
作者信息
- 1. 中国石化镇海炼化分公司，浙江镇海 315207
- 2. 华东理工大学石油加工研究所，上海 200237
- 折叠
摘要
Abstract
This paper discusses the citric acid treated USY zeolite in detail and the activity of the catalyst was evaluated by the reaction of olefins removal in aromatics with high bromine index. The results showed that the acidity of 0.2mol/L citric acid was suitable for treatment of USY zeolite. The Al removed from the framework of zeolite was in the form of extra-framework Al. It was found that the mesopore area and mesopore volume became larger after modification and the newly generated mesoporous could slow down the deactivation rate. The reduction of the B acid site and the enhancement of the L acid in the samples occurred after the treatment of citric acid. And the deactivation of USY zeolite catalysts was due to a limitation of access of the reactant to the active sites or a blockage of the access. After modified by citric acid,the USY zeolite exhibited a higher catalytic activity in removal of olefins in aromatics than the ordinary clay and the modified clay. Regeneration experiments demonstrated that the activity of the modified USY zeolite was still remained above 90% after three regenerations.关键词
催化/石油/脱烯烃/沸石/脱铝/失活Key words
catalysis/petroleum/olefins removal/zeolite/dealumination/deactivation分类
化学化工引用本文复制引用
黄朝晖,刘乃旺,姚佳佳,濮鑫,施力..USY 分子筛表面酸性的调变及其在催化脱除芳烃中烯烃的应用[J].化工进展,2016,(1):138-144,7.
