摘要
用水热晶化法，以TEAOH（四乙基氢氧化铵）为模板剂会成出了CdAPO-5分子筛晶体。对样品进行XRD、IR、电子探针等分析，确认其具有AIPO4－5型分子筛结构，属六方晶系，并证实金属Cd进入分子筛的结构骨架，同时对其吸附性能、热稳定性及催化活性进行研究，结果表明CdAPO-5分子筛作为催化剂不仅热稳定性好，机械强度高，且对乙炔水合制乙醛、乙醇脱水制乙醚等反应具有良好的催化性能。
A CdAPO-5 molecular sieve hithcrto unknow was synthesized hydrothermally in the presence of the organic amine (TEAOH) which acts as the template. The crystalline structure ofCdAPO-5 was characterized by XRD, IR and electron probe energy dispersion analysis. The parameters of the unit cell were determined. All the results show that the structure of CdAPO-5 isof the AlPO4-5 molecular sieve type and cadmium atoms enter into the framework of CdAPO-5molecular sieve. The adsorption isotherms, thermal stability and catalytic activity were also tested. The results show that CdAPO-5 not only has great adsorption capacity, high thermal stability, but also has good catalytic activity for vapor-phase hydration of acetylene to acetaldehyde andfor the dehydrolysis of ethanol to ether.
关键词
CdAPO-5
分子筛
催化剂
cadmium aluminophosphate,molecular sieve,catalytic activity
