以葡萄糖为碳源，通过氯化亚锡二水合物、酒石酸水热法制备SnO₂/C复合微球，进一步经水热去除锡后得到多孔碳微球（PCMs）。随后对PCMs进行低温水热氧化、对苯二胺酰胺化和氯磺酸磺化处理，得到高密度磺酸型多孔碳微球固体酸催化剂（SPCMs）。利用SEM对实验过程中碳微球进行形貌分析，利用FT-IR、XPS、TG等表征手段分析三步改性实验的可行性，并将SPCMs用于废油脂与甲醇的酯交换反应制备脂肪酸甲酯（FAMEs），在醇油摩尔比为16：1、催化剂质量为0.6 g、140℃下反应4 h，FAMEs最佳产率为93.5%。

SnO₂/C composite microspheres are prepared by means of hydrothermal method with glucose, stannous chloride dihydrate and tartaric acid as raw materials.Porous carbon microspheres (PCMs) are obtained through removing tin from SnO₂/C composite microspheres by further hydrothermal method.PCMs are dealt by low temperature hydrothermal oxidation, p-phenylenediamine acylation and chlorosulfonic acid sulfonation to obtain high density sulfonic acid-type porous carbon microsphere-base solid acid catalyst (SPCMs).SEM is utilized to analyze the morphology of carbon microspheres during the experiment.FT-IR, XPS, TG and other characterization means are used to analyze the feasibility of the three-step modification experiment.In addition, SPCMs is applied to prepare fatty acid methyl ester (FAMEs) by transesterification between waste grease and methanol.The optimal yield of FAMEs reaches 93.5% when the molar ratio of methanol to spent grease is 16:1, the dosage of SPCMs is 0.6 g, and the reaction has performed at 140℃ for 4 hours.

薛媛(1996-),女,硕士研究生,研究方向为固体酸催化剂,1284626369@qq.com。