氮化MCM-22分子筛的程序升温制备  

THE PREPERATION OF NITROGEN-INCORPORATED MCM-22 THROUGH TEMPERATURE-PROGRAMMED ROUTE

作　　者：武光军[1] 杨雅莉[1] 王学明[1] 孙青[1] 章福祥[1] 关乃佳[1] 

机构地区：[1]南开大学新催化材料科学研究所,天津300071

出　　处：《石油学报（石油加工）》2006年第B10期193-195,共3页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金（20233030,20573059）和973计划（2003CB615801）资助项目

摘　　要：利用程序升温的方法分别在700、800、900℃对除去和未除去模板剂的MCM-22分子筛进行高温氮化。结果表明，以2℃／min的升温速率进行氮化后的分子筛的N含量高于以5℃／min进行氮化的分子筛的N含量，含模板剂的分子筛氮化后的N含量要高于不含模板剂的分子筛氮化后的N含量。通过对比氮化前后分子筛的骨架红外谱图，在-1400cm^-1处发现1个随着N含量变化而变化的新峰，将其归属为-NH4特征峰。将氮化后的分子筛用于甲苯甲醇烷基化制对二甲苯的反应，发现甲苯的转化率明显提高。The nitrogen-incorporated MCM-22 molecular sieves were respectively synthesized at 700, 800, 900℃ through temperature-programmed route. The nitrogen contents of samples nitrided at 2;C/min were higher than those of the samples nitrided at 5℃/min, and the nitrogen contents of samples with template before nitridation were also higher than that of the samples without template. Compared with the pure MCM-22, a new peak at -1400 cm^-1 changed with the nitrogen content was found in the FT-IR spectrum of nitrogen-incorporated sample, which were attributed to the -NHx. The sample nitrided at 800℃ was used in the alkylation of toluene and methanol and the reactive activity was found to be obviously improved.

关 键 词：MCM-22 分子筛 氮化 程序升温 N含量 

分 类 号：O643[理学—物理化学]