生物油离子交换树脂催化酯化试验研究  

Experimental research on bio-oil catalytic esterification using cation exchange resins

作　　者：王琦[1,2] 姚燕[2] 王树荣[1] 骆仲泱 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [2]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《浙江大学学报（工学版）》2009年第5期926-930,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家“973”重点基础研究发展规划资助项目(2007CB210204);国家自然科学基金资助项目(90610035,50676085)

摘　　要：生物油由于含有大量有机酸性物质而具有较强的腐蚀性,不利于其规模化利用.利用间歇式玻璃反应釜,在60℃、油醇质量比为1∶2、催化剂质量分数为20%和全回流条件下,研究了强酸型离子交换树脂催化的生物油酯化精制反应,目的是改变生物油的强酸性,提高其品质.结果表明,酯化后生物油的含水量和黏度下降,热值提高了42.7%;生物油中低级羧酸均得到不同程度的转化,产物分布发生较大变化,主要生成乙酸乙酯、原乙酸三乙酯等新成分,并提出了原乙酸三乙酯的生成机理.Bio-oil contains a large amount of organic acids, which results in strong corrosion and restrains its application in large scale. Catalytic esterification of bio-oil was carried out in a total reflux mode over strongly acidic cation exchange resins in a glass batch reactor at 60℃. The mass ratio of oil/ethanol was 1 ： 2, and the catalyst mass fraction was 20% of the reaction solution. The results indicated that after esterification, the viscosity and water content of the bio-oil decreased obviously and the gross calorific value increased by 42.7%. The chemical composition of the upgraded bio-oil was different from that of the crude bio-oil, in which most of the organic acids were converted into esters. Besides, the formation mechanism of orthoacetic acid trimethyl ester was proposed.

关 键 词：生物油 催化酯化 阳离子交换树脂 

分 类 号：TK6[动力工程及工程热物理—生物能]