Preparation of solid acid catalyst from glucose-starch mixture for biodiesel production
Preparation of solid acid catalyst from glucose-starch mixture for biodiesel production
复制标题
葡萄糖-淀粉混合物制备生物柴油用固体酸催化剂
DOI：
10.1016/j.biortech.2010.10.099
复制
发表时间：
2011-02-01
影响因子：
11.4
通讯作者：
Fang, Baishan
中科院分区：
文献类型：
--
作者：
Chen, Guo;Fang, Baishan
本工作的目的是研究葡萄糖-淀粉混合物制备催化剂。结果表明，当葡萄糖与玉米粉以1：1的比例混合，400 ℃恒温75 min，150 ℃用98%浓硫酸磺化5 h时，固体酸的酯化活性最高。用酸活性测定法对催化剂进行了表征。结果表明，CS_（0.073）O_（0.541）组成的固体酸具有由-SO_3 H和-COOH形成的刘易斯酸中心和B酸中心。油酸酯化和三油酸甘油酯酯交换反应的转化率分别为96%和60%。高游离脂肪酸（FFA 55.2wt.%）废棉籽油制备生物柴油的催化剂12小时后得到约90%的甲酯产率。催化剂循环使用后逐渐失活，但经硫酸处理后可再生。(C)2010爱思唯尔有限公司版权所有。
The aim of this work is to study the catalyst prepared by glucose-starch mixture. Assessment experiments showed that solid acid behaved the highest esterification activity when glucose and corn powder were mixed at ratio of 1:1, carbonized at 400 degrees C for 75 min and sulfonated with concentrated H2SO4 (98%) at 150 degrees C for 5 h. The catalyst was characterized by acid activity measurement,. XPS, TEM and FT-IR. The results indicated that solid acid composed of CS0.073O0.541 has both Lewis acid sites and Bronsted acid sites caused by -SO3H and -COOH. The conversions of oleic acid esterification and triolein transesterification are 96% and 60%, respectively. Catalyst for biodiesel production from waste cottonseed oil containing high free fatty acid (FFA 55.2 wt.%) afforded the methyl ester yield of about 90% after 12 h. The catalyst deactivated gradually after recycles usage, but it could be regenerated by H2SO4 treatment. (C) 2010 Elsevier Ltd. All rights reserved.