摘要
本文用TG、MS、元素分析等方法研究了合成沸石烘干原粉中有机胺的存在状态。结果表明,沸石孔道中有机胺有两种状态,一种是物理吸咐态正丁胺,另一种是电荷补偿态的三丁基胺。并从孔道填充角度分析说明,三丁基胺作为模板剂有利于ZSM-5沸石的晶化。阶段取样实验证明,有机胺主要以电荷补偿阳离子形式构成三丁基胺正四面体结构,导向ZSM-5沸石核的生成。同时,正丁胺以物理吸咐态形式进入沸石孔道。酸性测定发现,正丁胺合成体系品化的ZSM-5沸石,强酸性中心主要产生于电荷补偿有机胺分解后生成的酸性中心。
Various techniques, such as TG, MS and elemental analysis etc., were used to investigate the behaviour of n-butylamine in ZSM-5 zeolite synthesis. Results showed that butylamines existed in two states in ZSM-5 channels: physically adsorbed n-butylamine and chargecompensating tributylamine. ZSM-5 channels were most effectively filled by butylamines in the crystallization process. The study of different crysallization stage demonstrated that charge-compensating amines directed the formation of ZSM-5 zeolite; while the physically adsorbed amines entered zeolite channels with the crystallization process. Acid messurement indicated that stronger acid sites were formed by decomposition of charge-compensating tributylamine, and the reason has also been discussed.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1990年第4期343-349,共7页
Journal of Fuel Chemistry and Technology
关键词
ZSM-5
沸石
合成
正丁胺
模板效应
ZSM-5 zoelite
n-butylamine
tributylamine
strong acid center
charge-compensating state
