摘要
采用原位红外光谱技术研究介孔材料表面酸性,结果表明吡啶同酸性中心作用最佳实验条件为:真空度10～3Pa,活化温度400℃,室温吸附30 min。该实验条件下,测得MCM-41介孔分子筛表面B酸位和L酸位同时存在,脱附温度升高时B酸向L酸转化。
In situ infrared spectroscopy（ Fy - IR） was used to investigate the surface acidity of mesoporous mate- rial, The results showed that the best experimental conditions of pyridine with acid central roler were vacuum degree 10-3Pa, activation temperature 400℃, room temperature adsorption 30rain. The results indicated that there were Lewis acid and Brnsted acid site existed on MCM - 41 molecular surface and B acid to L acid conversion when strip- ping temperature was in the test conditions.
出处
《化工时刊》
CAS
2013年第3期6-8,共3页
Chemical Industry Times
基金
黑龙江省自然科学基金资助项目(B201010)
关键词
红外光谱
吡啶
表面酸性
吸附
Fy - IR pyridine surface acidity adsorption
