摘要
使用浸渍法将复盐NaAlCl4负载在ZSM-5表面,对比使用不同硅铝比的ZSM-5分子筛作为载体,同时变化温度,综合研究不同催化剂对歧化生成二甲基二氯硅烷的影响.通过X射线衍射仪(XRD)、气相色谱仪(GC)、电子扫描电镜(SEM)、比表面测试(BET)、NH3吸附-脱附(NH3-TPD)等对其进行了表征.结果表明:低温时反应为表面控制,高温时为活化控制.当温度为373 K,负载比例为4%,硅铝比为38时,催化剂活性达到最佳,产率为57.9%.
ZSM-5 zeolite with different Si/Al ratios was selected as catalyst carrier and the salt of the NaAlC14 as the surface load. The catalytic performance with different Si/Al ratios at different temperatures was compared to investigate the effects of Si/Al ratio. Commonly used, the catalysts were characterized by X-ray diffraction （XRD）, GC, scanning electron microscope （SEM）, BET and NH3-TPD and so on. The catalyst which Si/AI ratio was 38 had the greatest acidity and was the most active one. The results showed that the catalytic activity depended on the surface area at low temperature, while at high temperature depended on the activation sites. When Si/Al ratio was 38, at 373 K, Cat-4% showed the best catalytic effect, of which yield of dichlorodimethylsilane was 57.9%.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2015年第5期25-29,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(21163005)
江西省自然科学基金资助项目(20132BAB203013)
