邢世才,郑岚,王玉琪,邹永强,袁伟健,倪世峰,陈开勋

• 1:西北大学化工学院
• 2:西部资源生物与现代生物技术教育部重点实验室

摘要(Abstract)：

以硅胶、氧化镁、椰壳活性炭和活性氧化铝为载体、以KOH为活性组分制得一系列新型负载型固体碱催化剂。考察了催化剂对超临界CO2和CH3OH直接合成碳酸二甲酯反应的催化性能。结果表明:以椰壳活性炭为载体的KOH负载型催化剂的催化活性最高。采用比表面积测试(BET)、X-射线衍射(XRD)和扫描电镜(SEM)表征等手段对催化剂进行结构测试表明:椰壳活性炭的比表面积最大,能够很好地作为载体;负载的KOH经高温焙烧后分解为K2O,提高了催化剂活化CO2的能力;负载后的催化剂表面晶型孔道尺寸变大,K2O在催化剂的表面及孔道内壁上分散较好。以KOH/C为催化剂,重点考察了KOH负载量、不同催化体系、反应温度和压力等对催化剂活性的影响;最后对反应过程进行了强化,获得了最佳条件下合成DMC的产率为8.5%,优于现有超临界非均相催化直接合成DMC的文献报道结果。

关键词(KeyWords)： 椰壳活性炭;超临界CO2;甲醇;直接合成;碳酸二甲酯

Abstract:

Keywords:

基金项目(Foundation): 陕西省教育厅自然科学专项(12JK0588);; 西部资源生物与现代生物技术教育部重点实验室(西北大学)开放基金项目(ZS12105)

作者(Author): 邢世才,郑岚,王玉琪,邹永强,袁伟健,倪世峰,陈开勋

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