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Tang Xincheng,Niu Shengli 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.69 No.-
A series of carbon-based solid acid catalysts are synthesized from bamboo through the approach of partial carbonization and sulfonation, where predecessor of the catalyst is activated by phosphoric acid in advance. After carbonization at 350 °C for 2 h and sulfonation at 105 °C for 4 h, the catalyst gained amorphous carbon structure with large surface area of 1208 m2 g−1 and strong acid density of 1.28 mmol g−1. The biodiesel yield reached 97.3% with the optimum esterification conditions. Due to the leaching of SO3H groups, after fourth reused cycle of the catalyst, the biodiesel yield declines to 83.7%.
Tang Xincheng,Niu Shengli,Zhao Shuang,Zhang Xiangyu,Li Ximing,Yu Hewei,Lu Chunmei,Han Kuihua 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The carbon-based heterogeneous acid catalyst is synthesized from bituminous coal through the partialcarbonization and sulfonation method and applied to catalyze the esterification of oleic acid withmethanol for biodiesel production. Various characterization methods are used to explain catalyticfeatures and molecular simulation is conducted to analyze the promoted mechanism of acid catalyst inesterification. Carbon catalyst, prepared by partially carbonized at 350 C and sulfonated at 105 C,catalyzes esterification with biodiesel yield of 98.70%. Transition state analysis implies that acid catalystreduces the activation energy through providing proton to promote esterification.