摘要
烃类催化裂解生产乙烯、丙烯已经引起了石化行业的广泛关注。ZSM-5分子筛由于其优异的孔道择形性、适宜的酸性质、良好的水热稳定性以及抗结焦能力等,是目前烃类催化裂解反应中最高效的催化剂之一。稀土元素因自身独特的4f电子层结构和镧系收缩特性,在催化反应过程中表现出良好的助催化性能。目前,稀土分子筛催化材料在石油化工领域发挥着重要作用。总结了La,Ce等稀土元素对分子筛催化剂结构、酸性质和稳定性等物化性质的影响,重点论述了稀土改性ZSM-5分子筛在烃类催化裂解反应中的研究进展及作用机理,提出了稀土分子筛催化材料未来的发展前景。
The catalytic cracking of hydrocarbons to produce light olefins has attracted extensive attention in petrochemical industry.ZSM-5zeolites have been considered as one of the most effective catalysts because of its excellent shape selectivity,suitable acidity,good hydrothermal stability and anti-coking ability.Rare earth(RE)elements show good co-catalytic performance in catalytic reactions due to its unique 4felectron structure and lanthanide contraction characteristic.Currently,rare earth elements modified zeolites catalytic materials play an important role in the petrochemical industry.In this paper,we review the effects of rare earth elements such as lanthanum(La)and cerium(Ce)on the structure,acidity,and stability of the zeolites catalysts.And the research progress and reaction mechanisms of rare earth modified-ZSM-5zeolites in hydrocarbons catalytic cracking are summarized.Finally,the perspectives for future research directions of rare earth element modified zeolites are proposed.
作者
肖霞
王鹏
潘昱彤
赵震
姜桂元
范晓强
孔莲
解则安
XIAO Xia;WANG Peng;PAN Yutong;ZHAO Zhen;JIANG Guiyuan;FAN Xiaoqiang;KONG Lian;XIE Zean(College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China;Institute of Catalysis for Energy and Environment,Shenyang Normal University,Shenyang 110034,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China)
出处
《沈阳师范大学学报（自然科学版）》
CAS
2022年第2期121-126,共6页
Journal of Shenyang Normal University:Natural Science Edition
基金
中石油卡脖子关键技术项目(HX20210232)
国家自然科学基金资助项目(21802098,91845201)
