绿豆碳基固体酸催化剂的制备及其活性研究  

Preparation of carbon-based solid acid catalyst from mung bean and its catalytic activity research

作　　者：陈海英[1] 吴凤凤[2] 崔政伟[1] 金光远[1] 

机构地区：[1]江南大学江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [2]江南大学食品学院食品科学与技术国家重点实验室,江苏无锡214122

出　　处：《应用化工》2016年第3期406-411,共6页Applied Chemical Industry

基　　金：国家自然科学基金(31401493);中央高校基本科研业务费专项资金(JUSRP51634B;JUSRP51511-1)

摘　　要：以绿豆为原料,采用碳化-磺化法制备了一种新型碳基固体酸催化剂,对其理化特性进行了表征,并考察了其催化油酸甲酯化活性。研究表明,催化剂中硫元素含量为8.671%,傅里叶红外转换光谱验证了磺酸基功能团的存在。研究表明,较适宜的碳化时间为15 min,碳化温度为350℃,磺酸化时间为1 h,磺酸化温度为80℃。催化剂重复利用5次后及催化活性再生后再重复利用5次,催化转化率依然维持在68%左右。微波可以辅助催化油酸甲酯化反应的进行,微波功率为400 W,温度为65℃时,油酸甲酯化的转化率高达87%左右。总体而言,研究中自制绿豆碳基固体酸催化剂是一种性能稳定、绿色环保的固体酸催化剂,可在微波辅助固体酸法制备生物柴油的工业化生产中推广应用。Based on the comprehension of physicochemical properties of mung bean,a novel carbon-based solid acid catalyst was successfully prepared from mung bean by carbonization after with sulfonation process. The physicochemical properties of catalyst were characterized and its application in the methyl esterification of oleic acid was detected. Elemental analysis results showed that the sulphur content in the catalyst increased to 8. 671% and FTIR spectrum displayed that the presence of sulfonic acid functional groups. The studies showed that the optimum process condition was that carbonation at 350 ℃ for 15 min and sulfonation at 80 ℃ for 1 h. The research on the reusability and regeneration of the catalyst showed that the catalytic activity still remained above 68% after reuse 5 times and remained above 68% after regeneration and reusing for 5 times. Microwave heating could effectively promote the methyl esterification of oleic acid. When the microwave temperature was 65 ℃ and microwave power was 400 W,the methyl esterification conversion rate reached around 87%. On the whole,the catalyst made by ourselves presented a stable high-efficiency catalytic activity and an effectively reusability and regeneration. It could be promoted in biodiesel process in industry.

关 键 词：碳基固体酸催化剂 微波 绿豆 

分 类 号：TQ426.62[化学工程] S522[农业科学—作物学]