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.
作者
薛媛
王思宇
袁红
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)
出处
《现代化工》
CAS
CSCD
北大核心
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)。
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
high-density sulphonic acid groups
porous carbon microspheres
acid density
spent grease
transesterification reaction
