Preparation of carbon-based solid acid catalyst from mung bean and its catalytic activity research
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 es-terification 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 re-generation 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 es-terification 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 promo-ted in biodiesel process in industry.
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维普
