摘要
采用复合模板剂在酸性条件下合成一种特殊晶体结构的分子筛,通过SEM,XRD,FT-IR,NMR,XRF,BET,DTA,TGA等表征方法对其结构特性、物化性质进行表征,在连续流动固定床小型反应装置上考察该分子筛对间二甲苯异构化反应的催化活性,并与采用单一模板剂合成的常规分子筛样品的结构和性能进行对比。结果表明:采用复合模板剂合成的样品为SAPO-11分子筛,其每个晶粒中均存在不规则四方形的孔;与常规SAPO-11分子筛相比,采用复合模板剂合成的SAPO-11分子筛的物化性质具有特殊性,具有较高的热稳定性和较强的酸性,对间二甲苯异构化反应具有较高的催化活性。
A special crystal structure SAPO-11 zeolite was synthesized by using composite template in acidic conditions and characterized by SEM,XRD,FT-IR,NMR,CRF,BET,DTA and TGA techniques.Its isomerization activity for meta-xylene was evaluated in a small scale continuous flow fixed bed.The results were compared with that of the comparative SAPO-11 zeolite made from single template.The crystal morphology characterized by SEM demonstrates the existence of special crystal structure in each crystal of the samples using composite template;in addition,the physicochemical properties of this sieve having high thermal stability and strong acid are different from the comparative one,resulting in high activity for meta-xylene isomerization reaction.
作者
高俊魁
钟进
Gao Junkui Zhong Jin(SINOPEC Research Institute of Petroleum Processing, Beijing 100083)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2017年第5期37-42,共6页
Petroleum Processing and Petrochemicals
关键词
SAPO-11
复合模板剂
晶体结构
合成
表征
SAPO-11
composite template
crystal structure
synthesis
characterization
