联立双氧水氧化和催化酯化生物油提质研究  

CATALYTIC UPGRADING BIO-OIL BY MEAN OF H_2O_2 OXIDATION AND ESTERIFICATION TO IMPROVE FUEL CHARACTERISTICS

作　　者：郭姝君 鲁俊祥[1] 常杰[1] 付严[1] 

机构地区：[1]华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室,广州510640

出　　处：《太阳能学报》2017年第7期2020-2026,共7页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展(973)计划(2013CB228104);国家自然科学基金(21476090);中央高校基本科研业务费专项资金

摘　　要：在低温条件下将生物油的不稳定组分醛酮类等通过氧化酯化联立提质,制备获得以酯、醇、醚为主要成分的稳定含氧燃料。采用Amberlyst-36离子交换树脂为催化剂、H_2O_2为氧化剂,最优条件100℃,12.5%(质量分数)Amberlyst-36离子交换树脂和醇油质量比为1∶1,生物油的酸值从40.88 mg NaOH/g降至14.82 mg NaOH/g,水分含量从36.37%降至17.54%,热值由14.46 MJ/kg升至25.13 MJ/kg,粘度从18.49 mm^2/s降为7.04 mm^2/s,C元素含量从38.42%增至51.01%,O元素从52.75%减至39.86%。相比较于酯化提质,H_2O_2的存在使体系中不稳定的醛酮类进一步转化为稳定的目标产物,氧化酯化提质油中酯、醇、醚的相对含量为84.2%,比酯化提质油高19.6%,酸类、醛酮类的相对含量降至0.08%、5.12%,比酯化提质油分别少2.60%、4.23%,最后利用水和CH_2Cl_2对氧化酯化提质油萃取分离得到高附加值的糖类及其衍生物。The unstable components such as aldehydes, ketones and phenols in bio-oil were converted to the compounds mainly composed of ester, alcohol and ether under the oxidation of H2O2 at lower temperature. Bio-oil upgrading by mean of H2O2 oxidation and esterification, Amberlyst-36 ion exchange resin was chosen as catalyst, H2O2 was chosen as the oxidant. The physical and chemical properties of bio-oil improved significantly under conditions of 100 ℃, 12.5% （mass concentration） Amberlyst-36 ion exchange resin and alcohol-oil massratio of 1： 1. When the acid value was reduced from 40.88 mg NaOH/g to 14.82 mg NaOH/g, the moisture content was reduced from 36.37% to 17.54%, the calorific value of the 14.46 MJ/kg was up to 25.13 MJ/kg, the viscosity from 18.49 mm2/s was reduced to 7.04 mm2/s, C element content was increased from 38.42% to 51.01% , while the oxygen element content was reduced from 52.75% to 39.86%. Compared to simple esterification upgrading, the unstable aldehydes and ketones were transformed into stable target products more efficiently under the presence of H2O2. Therefore, the target products of the ester, alcohol and ether of oxidation esterification upgraded bio-oil reached up to 84.2%, higher than esterification upgraded bio-oil which is 19.6%. The relative content of aldehydes and ketones fell to 5.12 %, 4.23% less than the esterification upgraded bio-oil and the content of acids fell to 0.08%, 2.6% less than the esterification upgraded bio-oil. Water and methylene were used to the extraction and separation of oxidation esterification upgraded bio-oil to obtain high value-added sugars and their derivatives.

关 键 词：生物油 氧化酯化 提质 含氧燃料 糖类 

分 类 号：TK6[动力工程及工程热物理—生物能]