摘要
以浸渍法制备的改性膨润土为催化剂，在自行设计的流化床装置上评价了乙醇脱水制乙烯的催化性能；采用X-射线衍射（XRD）、傅里叶变换红外（FT-IR）、扫描电镜（SEM）、比表面分析（BET）和热重分析（TG）等手段对催化剂的理化性能进行表征，同时考察了不同催化剂制备条件和催化反应条件等工艺因素对催化剂性能的影响。结果表明，当硫酸质量分数为44％，水洗至pH值为4～5，添加0．15g混合氯化稀土，反应温度为270℃，乙醇的进样流速为013mL／min，催化剂用量3g，催化反应的活性最佳，出口乙烯气体的体积分数可达8．56×10^-1。
The catalytic activity of modified bentonite prepared by impregnation method was examined on ethanol dehydration in the self-design fluid bed to prepare ethene. The catalyst was characterized by XRD, FT-IR, SEM, BET and TGA. The effects of catalyst preparation and reaction conditions on the catalytic activity were investigated. The results showed that when sulfuric acid concentration was 44 wt%, pH value was 4 - 5, chloridize thulium amount was 0.15 g, reaction temperature was 270℃, ethanol flow velocity was 0.3 mL/min, the catalyst amount was 3 g, the best catalytic activity was obtained, the concentration of ethene gas could reach 8.56× 105 ppm.
出处
《广州化学》
CAS
2008年第2期13-18,24,共7页
Guangzhou Chemistry
基金
国家科技支撑计划(2006BAE03B06)
教育部"新世纪优秀人才支持计划"(NCET-04-0614)
福建省教育厅科技计划(JB06079)资助项目
关键词
改性
膨润土
流化床
乙醇
脱水
乙烯
modified, bentonite, fluid bed, ethanol, dehydration, ethene
