混合添加剂对生物油稳定性的影响  

EFFECTS OF MIXED ADDITIVES ON THE STABILITY OF BIO-OIL

作　　者：吴小武[1] 刘荣厚[1] 尹仁湛[1] 费雯婷[1] 

机构地区：[1]上海交通大学农业与生物学院生物质能工程研究中心,上海200240

出　　处：《太阳能学报》2014年第7期1218-1224,共7页Acta Energiae Solaris Sinica

基　　金："十二五"国家科技支撑计划(2011BAD22B07);国家自然科学基金(51176121)

摘　　要：首先考察在添加剂质量分数为4%时,乙醇与丙烯酸甲酯质量比(简称配比)分别为10∶1、5∶1、2.5∶1、1∶1、1∶2.5、1∶5、1∶10时混合添加剂对生物油稳定性的影响,发现混合添加剂的较佳配比为1∶1。之后,通过向生物油中分别加入质量分数为4%、8%、12%、16%、20%的配比为1∶1的混合添加剂,考察生物油在25℃条件下储存42 d的理化性质变化规律,研究在较佳配比下不同质量分数混合添加剂对生物油稳定性的影响。结果表明,在混合添加剂的配比为1∶1,添加质量分数为12%,未储存时,含添加剂的生物油的运动粘度为9.52 mm2/s,是空白组(17.40 mm2/s)的54.71%;储存42 d后,含添加剂的生物油运动粘度为11.01 mm2/s,其储存过程中运动粘度的上升速率(0.0355 mm2/(s·d))为空白组生物油运动粘度上升速率(0.0820 mm2/(s·d))的43.30%,说明混合添加剂能显著提高生物油的储存稳定性。气相色谱-质谱联用及傅里叶变换红外光谱分析结果表明:生物油中羧基聚合物,烷烃及酮、醛、羧酸的含量较高,储存后参与老化反应消失的物质主要归属于苯酚类、羧酸类、醇类及酮类4类。The effects of mixed additive made at different mass ratios of ethanol to methyl acrylate, namely, 10： 1, 5：1, 2.5： 1, 1：1, 1：2.5, 1：5, 1： 10, respectively, at the dose of 4% on the stability of bio-oil were firstly investigated. The results showed that the better ratio of mixed additive was 1： 1. The mixed additives at different dose including 4%, 8%, 12%, 16%, 20% at mass ratios of ethanol to methyl acrylate of 1 ： 1 were added into the bio-oils, and the changes of physicochemical properties of bio-oils during the 42 d· s storage period under 25 ℃ were investigated. The results showed that when the ratio of mixed additive and the dose of additive were 1：1 and 12%, respectively, the kinematic viscosity of the bio-oil mixed with additives without storage was 9.52 mm2/s, which is 54. 71% of the kinematic viscosity of the control group （ 17.40 mm2/s）. After storage for 42 d, the kinematic viscosity of the bio-oil mixed with additive was 11.01 mm2/s, and increase rate of the kinematic viscosity （0. 0355 mm2/（s·d） ） was 43.30% of that of the kinematic viscosity of the control group （0. 0820 mm2/（s·d） ）. This indicates that the mixed additive can improve the storage stability of bio-oil significantly. The results of the GC- MS and Fourier Transform Infrared Spectroscopy analysis showed that the contents of carboxyl polymers, alkanes and ketones, aldehydes, earboxylic acid were high in the bio-oil. The disappeared substances in the bio-oil after storage were mainly phenols, carboxylie acids, alcohols and ketones.

关 键 词：生物油 混合添加剂 稳定性 热裂解 GC-MS分析 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.4[农业科学—农业机械化工程]