摘要
用水热法合成出含铁ZSM-5沸石,并对其物相、外貌、结构组成、吸附、表面酸性和催化活性等性能作了测试。ESR和XPS测定结果表明Fe^(3+)进入沸石骨架。实验结果表明,表面总酸性较弱,L酸位浓度较大的H(Fe)ZSM-5在甲醇转化反应中有利于低碳烃的齐聚和异构化,而酸性较强的HZSM-5易使低碳烯烃氢转移而生成大量的气态烃。
H(Fe)ZSM-5 zeolite have been synthesised by hydrothermal method. An investigation of morphology, structure, composition, adsorption, surface acidity and catalytic activity has been carried out. It was proved by ESR and XPS spectra that Fe3+ ion were in the zeolite framework. The experiment results established that the surface acidity of H(Fe)ZSM-5 is weaker than that of HZSM-5 but the Lewis acid of H(Fe)ZSM-5 is stronger than that of HZSM-5. So in mcthanol conversion reaction H(Fe)ZSM-5 is good catalyst for polymerization and isomerization of paraffinic hydrocarbons with shorter carbon chain and HZSM-5 with stronger surface acid is good for cracking reaction and result in more gaseous hydrocarbons formation.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1992年第2期168-172,共5页
Chinese Journal of Inorganic Chemistry
