摘要
通过Na和K碱金属溶液对ZSM-5载体进行离子交换改性,采用浸渍法制备合成气制低碳烯烃铁基催化剂。利用固定床反应器中对催化剂活性进行评价;采用N_2吸附-脱附,SEM、XRD、TPR等对催化剂进行表征。结果表明:通过碱金属对载体改性可提高烯烃收率;CO+H_2转化率与碱金属活性成正比;载体孔径大小影响合成气制烯烃,孔径过小不利于烯烃的生成。
The ZSM-5 supported for conversion of syn-gas to light olefins were modified by NaOH and KOH solution via ion-exchange;the Iron based catalysts were then prepared by impregnation method.The catalysts were characterized by BET,SEM,XRD,TPR,etc.And their performances were evaluated through a fixed-bed reactor.Results show that the modification of catalyst by alkali ion-exchange significantly improves the conversion of syn-gas to olefins;and it is strongly related to the activation and alkalinity of alkali ions;the pore size of supporter is a critical factor impacting on the conversion of syn-gas and the ultra micro pore size restrains the production of olefins.
作者
林雄超
李晓佳
丁雄文
符亚三
石皓玉
Lin Xiongchao;Li Xiaojia;Ding Xiongwen;Fu Yasan;Shi Haoyu(School of Chemical and Environmental Engineering,China University of Mining&TechnologyBeijing,Beijing 100083,China)
出处
《山东化工》
CAS
2019年第5期4-5,8,共3页
Shandong Chemical Industry
基金
国家重点研发计划项目(2016YFB060030301)
大学生创新训练项目(C201703320)
