高密度磺酸型多孔碳微球固体酸的制备及其在废油脂酯交换反应中的应用  

Preparation of high-density sulfonic acid-type porous carbon microsphere-based solid acid and its application in transesterification of spent grease

作　　者：薛媛 王思宇 袁红[1,2] XUE Yuan;WANG Si-yu;YUAN Hong(Chemical Science and Engineering College,North Minzu University,Yinchuan 750021,China;State Key Laboratory of National Ethnic Affairs Commission Chemical Technology,North Minzu University,Yinchuan 750021,China)

机构地区：[1]北方民族大学化学与化学工程学院,宁夏银川750021 [2]北方民族大学国家民族事务委员会化学技术国家重点实验室,宁夏银川750021

出　　处：《现代化工》2022年第6期112-117,123,共7页Modern Chemical Industry

基　　金：国家自然科学基金项目(21962001)。

摘　　要：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SnO_(2)/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%。SnO_(2)/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 SnO_(2)/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.

关 键 词：高密度磺酸基 多孔碳微球 酸密度 废油脂 酯交换反应 

分 类 号：O69[理学—化学]