摘要
为了寻找一种以生物质废弃物为原料,低成本、高效率、温和地合成固体酸催化剂的方法,以废弃生物质橘子皮为原料,合成了磁性多孔碳质(MPCs)固体酸催化剂。采用XRD、IR和TGA等手段对其进行分析表征,并以油酸和乙醇酯化反应为模型,研究其催化性能。结果表明:在80℃、乙醇与油酸的物质的量比值为20%、催化剂与油酸的质量比值为7%的条件下反应8 h,MPCs-0.4-SO3H和MPCs-0.6-SO3H的酯化率分别达到77.9%和70.2%,显著高于商用催化剂Amberlyst-15的酯化率;在含水量为油酸质量的5%以及重复使用3次的酯化率与TOFs值也较Amberlyst-15的高;故实验制得的催化剂在酯化动力学、酯化率、耐水性与热稳定性等方面均优于商用催化剂Amberlyst-15,特别是其优越的磁性易分离特性使得酯化反应更方便、简单。
In order to find a method to synthesize solid acid catalysts with low cost,high efficiency and mild conditions using biomass waste as raw materials,waste biomass orange peels were used as raw materials to synthesize magnetic porous carbon(MPCs)solid acid catalysts.It was analyzed and characterized by XRD,IR,TGA and other means,and its catalytic performance was studied using the esterification reaction of oleic acid and ethanol as a model.The results showed that the esterification rate of MPCs-0.4-SO3H and MPCs-0.6-SO 3H reached 77.9%and 70.2%,which was significantly higher than the esterification rate of commercial catalyst Amberlyst-15,when the ratio of ethanol to oleic acid was 20%,the mass of catalyst was 7%of the mass of oleic acid,and the temperature was 80℃for 8 h;When the water content was 5%of the mass of oleic acid and the catalyst was reused for 3 times,the esterification rate and TOFs value were also higher than that of Amberlyst-15;Therefore,the catalyst prepared in the experiment was superior to commercial catalyst Amberlyst-15 in esterification kinetics,esterification rate,water resistance and thermal stability,especially its superior magnetic and easy separation characteristics made the esterification reaction more convenient and simple.
作者
付小琴
李姣
薛静
刘晓红
白延宁
FU Xiao-qin;LI Jiao;XUE Jing;LIU Xiao-hong;BAI Yan-ning(Yan'an Vocational and Technical College,Yan'an Shaanxi 716000,China;School of Chemistry&Chemical Engineering,Yan'an University,Yan'an Shaanxi 716000,China;Affiliated Hospital of Yan'an University,Yan'an Shaanxi 716000,China)
出处
《当代化工》
CAS
2023年第3期627-632,共6页
Contemporary Chemical Industry
基金
国家自然科学基金面上项目,电阻抗图谱法对重金属污染的毒理学响应及机理研究(项目编号:21377107)
延安职业技术学院重点科研项目(项目编号:YZKZ2302)。
关键词
磁性固体酸催化剂
生物柴油
酯化反应
油酸乙酯
Magnetic solid acid catalyst
Biodiesel
Esterification reaction
Ethyl oleate
