【摘要】 以扬子石化公司芳烃抽提返洗液为原料,以改性ZSM-5分子筛为催化剂,在200mL气固相催化反应装置上进行常压芳构化研究,考察反应温度、进料空速对芳构化反应的影响以及催化剂的稳定性及再生情况。结果表明,在常压、体积空速为4.0h-1、反应温度为450℃时,芳构化效果最佳,此时催化剂单程寿命约为12h;再生多次的催化剂具有与原始催化剂同样的催化性能;芳烃抽提返洗液常压芳构化可同时降低返洗液中的烯烃和环烷烃含量,增加目标产物芳烃含量。更多还原

【Abstract】 Using the back washing liquid from the aromatics extraction unit of Yangzi Petrochemical Company as feedstock and modified ZSM-5 zeolite as catalyst,the atmospheric aromatization experiments were carried out in a 200mL gas-solid catalytic reaction device.The effects of reaction temperature and VHSV on the aromatization reaction,catalyst stability and the regeneration of catalyst were studied.Results showed that the best aromatization results were obtained under the optimal reaction conditions of atmospheric pressure,a reaction temperature of 450℃ and a VHSV of 4.0h-1,and the catalyst life of once-through was about 12h.In addition,multiple times regeneration had minor effect on the catalytic performance of modified ZSM-5 zeolite catalyst.By atmospheric aromatization the contents of cyclanes and alkenes in the back washing liquid decreased and the content of target product(aromatics)increased significantly.更多还原