文献类型：期刊文献

中文题名：不同金属改性的ZSM-5分子筛正己烷裂解性能

英文题名：CRACKING PROPERTIES OF n-HEXANE OVER ZSM-5 MODIFIED WITH DIFFERENT METALS

作者：宋月芹[1];陈雪琴[1];何牧[1];周晓龙[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2021

卷号：52

期号：10

起止页码：176

中文期刊名：石油炼制与化工

外文期刊名：Petroleum Processing and Petrochemicals

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

语种：中文

中文关键词：裂解;ZSM-5分子筛;金属改性;正己烷

外文关键词：crack;ZSM-5 zeolite;modify with metal;n-hexane

摘要：轻烃催化裂解工艺因具有裂解温度低、产物分布可调以及可多产丙烯等优点而备受关注。采用等量浸渍法制备了一系列不同金属改性的ZSM-5分子筛催化剂,在固定床微型反应器中评价了其催化正己烷裂解性能。结果表明,4种不同金属(Ni,Fe,Cr,Co)改性的ZSM-5分子筛催化正己烷裂解反应的转化率都显示出下降趋势,但下降幅度不同,而且乙烯、丙烯选择性随不同金属的引入变化规律也不同。其中,Fe和Cr的引入对正己烷转化率的影响较小,而Co的引入导致正己烷转化率的下降幅度更大。就丙烯和乙烯选择性而言,随着金属的引入都有所增加。Co的添加对丙烯选择性提高幅度最大。因此,需要更高丙烯选择性时,可以牺牲正己烷转化率获得更多丙烯。
Light hydrocarbon catalytic cracking has attracted much attention because of its low cracking temperature,adjustable products distribution and high propylene yield.A series of ZSM-5 catalysts modified with different metals were prepared by impregnation,and cracking performances of n-hexane over the modified ZSM-5 catalysts were evaluated in the continuous flow fixed-bed reactor.The results showed that the conversion of n-hexane was decreased on ZSM-5 catalysts modified with Ni,Fe,Cr and Co,respectively.The decreasing extent of the conversion of n-hexane was the largest after Co introduction,but the smaller after Fe and Cr introduction.Propylene and ethylene selectivity was different at the same conversion over ZSM-5 modified with different metals.Compared with other metal,Co introduction improved propylene selectivity in larger extent at low conversion of n-hexane.Therefore,In order to get high propylene selectivity,the conversion of n-hexane could be lowered by adding Co.