摘要
在水热体系中，合成介质的酸碱性对ＭＣＭ－４１分子筛的生成有很大的影响，据此提出了ＭＣＭ－４１分子筛生成的详细机理。根据该机理，采用分步加入铝源和硅源的新方法合成出了ＭＣＭ－４１－Ｃ分子筛。并用ＸＲＤ、ＩＲ、ＮＨ３－ＴＰＤ和异丙苯裂解试验等手段，对ＭＣＭ－４１－Ｃ分子筛的性能进行了初步考查。试验结果表明，和普通的ＭＣＭ－４１分子筛相比，ＭＣＭ－４１－Ｃ分子筛呈现出较好的酸性特征和异丙苯裂解性能。
According to the great influence of system acidity and alkalinity on MCM41 molecular sieve
formation in hydrothermal condition, a detailed formation mechanism of MCM41 was proposed.
On the basis of the mechanism, a modified molecular sieve, MCM41C, was synthesized by a
new method including aluminum and silicon source additions step by step. The performance of
MCM41C was tested by XRD, IR, NH3TPD and cumene cracking, and the results showed that
MCM41C exhibited better acidity and hydrothermal stability as well as cracking activity than
those of common MCM41 mesoporous materials.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
1999年第7期59-63,共5页
Petroleum Processing and Petrochemicals
关键词
分子筛
活性
酸性
稳定性
MCM-41
molecular sieve, mechanism,
synthesis, activity, acidity, stability
