碳基固体酸微球的制备及催化性能研究  

Preparation and catalytic performance of carbon-based solid acid microspheres

作　　者：陈诗渊 曾丹林[1] 裴阳[1] 沈康文 张崎[1] 朱涵庆 王光辉[1] 

机构地区：[1]武汉科技大学化工学院湖北省煤转化与新型炭材料重点实验室,湖北武汉430081

出　　处：《现代化工》2016年第4期89-92,94,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(21473126);湖北省教育厅项目(B2014094);武汉科技大学湖北省煤转化与新型炭材料重点实验室开放基金(WKDM2013010)

摘　　要：碳基固体酸是一种新型环境友好催化剂。以葡萄糖、磺基水杨酸为原料,采用先水热后磺化的方法制备了碳基固体酸微球,并通过SEM、FT-IR、Boehm滴定对样品进行表征。考察了碳基固体酸微球的制备工艺条件,在水热反应温度为190℃,磺化温度为155℃,磺化时间为4 h的最佳反应条件下,制备的碳基固体酸微球最大酸量为4.596 mmol/g。用该碳基固体酸微球催化乙酸和乙醇的酯化反应,在催化剂质量为冰乙酸质量的12.5%,醇酸摩尔比为2.25∶1,反应时间为5 h条件下,最终的酯化率达到82.8%。碳基固体酸微球重复利用5次后,仍能保持较高的催化活性。Carbon-based solid acid is a new type of environmental-friendly catalyst. Carbon-based solid acid microspheres are successfully prepared from glucose and sulfosalicylic acid by hydrothermal method and sulfonated method. The solid acid is characterized by scanning electron microscopy,fourier transform infrared spectroscopy and Boehm titration. The highest acid density of the carbon-based solid acid microspheres is 4. 596 mmol / g under the optimal conditions： 190℃ of hydrothermal temperature,155℃ of the sulfonated temperature and 4 hours of the sulfonated time.The as-prepared catalyst is used to catalyze the esterification reaction of acetic acid with ethanol. The test results show that the esterification rate reaches 82. 8% when the weight ratio of the catalyst to ice acetic acid is 12. 5%,volume ratio of ethanol to ethyl acetate is 2. 25 ∶ 1 and reaction time is 5 hours. Carbon-based solid sulfonic acid microspheres still exhit high catalytic activity after reusing for at least 5 times.

关 键 词：固体酸 碳微球 酯化 

分 类 号：TQ426[化学工程]