摘要
采用等体积浸渍法制备得到KOH/铝柱撑膨润土固体催化剂,催化麻疯树油酯交换制备生物柴油,探讨KOH负载量和酯交换反应条件对生物柴油转化率的影响及催化剂再生性能,并对催化剂进行SEM、XRD表征。结果表明:KOH/铝柱撑膨润土催化剂中最佳KOH负载量为15%;最佳麻疯树油酯交换条件为反应温度75℃、催化剂用量7%、反应时间3 h、醇油摩尔比25∶1。在最佳条件下,生物柴油转化率为99.2%;再生处理的催化剂催化酯交换反应,生物柴油转化率高达98%;铝柱撑膨润土经由等体积浸渍KOH处理后,颗粒粒径明显减小,排列更加紧密,其表面附着有鳞片状物质,催化剂具有较大的层间距,d001层间距为11.9 nm。
KOH/A1 - pillared bentonite catalyst was prepared by the method of incipient wetness impreg- nation. Biodiesel was produced by transesterification of Jatropha oil catalyzed by KOH/A1 - pillared ben- tonite. The influences of KOH loading amount and transesterification reaction conditions on the conversion rate of biodiesel and regenerability of the catalyst were studied. KOH/A1 - pillared bentonite catalyst was characterized by scanning electron microscopy （SEM） and X -ray diffraction （XRD）. The results showed that the optimal KOH loading amount was 15% for the preparation of KOH/A1 -pillared bentonite cata- lyst. The optimal transesterification conditions of Jatropha oil were obtained as follows： reaction tempera- ture 75 ℃, catalyst dosage 7%, reaction time 3 h, and molar ratio of methanol to oil 25： 1. Under these conditions, the conversion rate of biodiesel was 99.2%. The regenerated catalyst was used to catalyze the transesterification of Jatropha oil, and the conversion rate of biodiesel was 98%. KOH/AI - pillared ben- tonite catalyst owned small particle size and compact particle arrangement, and the sheet- shape objects were loaded on the catalyst. KOH/A1 -pillared bentonite catalyst had large layer spacing, and the layer spacing of d001 was 11.9 nm.
作者
蒋文艳
魏光涛
张琳叶
李仲民
李志业
JIANG Wenyan1,2, WEI Guangtao2, ZHANG Linye2, LI Zhongmin2, LI Zhiye2(1. Agro - products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China; 2. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Chin)
出处
《中国油脂》
CAS
CSCD
北大核心
2018年第3期100-104,109,共6页
China Oils and Fats
基金
国家自然科学基金项目(21366003
21667004)
广西自然科学基金项目(2015GXNSFBA139031)
