CAJ | 학술논문

利用活性炭负载SnCl_4(SnCl_4/C)固体酸催化剂,考察了油酸乙酯合成过程中催化剂的制备、反复使用效能以及最佳催化时间,并选取油酸和月桂酸作为碱炼皂脚中C18和C12脂肪酸代表物合成乙酯生物柴油,比较了油酸乙酯和月桂酸乙酯的生物柴油品质.结果表明:SnCl_4/C催化剂在负载率45%时,重复使用5次时酯化率保持在71%-73%范围内,具有较好的稳定性;在反应温度89℃、醇油物质的量比6:1条件下,合成油酸乙酯最佳反应时间为8 h,分别以C12和C18脂肪酸为原料制备的乙酯生物柴油均基本符合国家标准,其中以C12脂肪酸制备的乙酯生物柴油品质略好于C18脂肪酸;乙酯生物柴油在一定程度上可以替代甲酯生物柴油.
이용활성탄부재SnCl_4(SnCl_4/C)고체산최화제,고찰료유산을지합성과정중최화제적제비、반복사용효능이급최가최화시간,병선취유산화월계산작위감련조각중C18화C12지방산대표물합성을지생물시유,비교료유산을지화월계산을지적생물시유품질.결과표명:SnCl_4/C최화제재부재솔45%시,중복사용5차시지화솔보지재71%-73%범위내,구유교호적은정성;재반응온도89℃、순유물질적량비6:1조건하,합성유산을지최가반응시간위8 h,분별이C12화C18지방산위원료제비적을지생물시유균기본부합국가표준,기중이C12지방산제비적을지생물시유품질략호우C18지방산;을지생물시유재일정정도상가이체대갑지생물시유.
For producing ethyl biodiesel by the transesterification reaction of fatty acid with ethanol,the preparation and re-use feasibility of the catalyst,and the effect of reaction time were individually investigated using SnCl_4/C as catalyst at 89℃ and molar ratio of ethanol to oil 6:1.Subsequently,the characteristics of two types of biodiesels,i,e.,ethyl laurate and ethyl oleate,prepared from oleic acid (C18) and lanric acid (C12) were compared.Results:SnCl_4/C can be steadily reproduced and has stable and high catalytic activity.The cost-effective reaction time for the transesterification reaction is 8 h.The two types of ethyl biediesel originated from oleie acid (C18) and laurie acid (C12) have comparable biodiesel characteristics which can satisfy the requirements of Chinese Biodiesel Standard and can replace methyl biediesel to some extent.