不同浓度的两种添加剂对生物油稳定性的影响  

EFFECTS OF TWO KINDS OF ADDITIVE AT DIFFENT DOSES 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1期1-7,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：为了研究不同浓度及种类的添加剂对生物油稳定性的影响,通过向生物油中分别加入质量浓度为4%、8%、12%、16%、20%的乙醇和丙烯酸甲酯,在25℃条件下储存42d,考察这两种添加剂对生物油储存过程中理化性质变化的影响,同时对储存前后的生物油进行气相色谱-质谱联用及傅里叶变换红外光谱分析。结果表明,乙醇及丙烯酸甲酯在添加浓度分别为12%及16%的条件下可明显降低生物油储存过程的运动粘度,达到较好改善生物油稳定性的效果。储存42d后,无添加剂、添加12%的乙醇和16%的丙烯酸甲酯生物油的运动粘度分别为23.55、10.81和9.67mm2/s,比储存前分别增加49.71%、17.40%和29.60%。在相同添加浓度条件下,乙醇降低生物油粘度的效果优于丙烯酸甲酯;添加剂还能提高生物油的pH值,降低生物油的含水率。气相色谱-质谱联用及傅里叶变换红外光谱分析的结果显示,生物油内发生了一系列反应,主要包括含氧杂环化合物的生成和苯及苯酚类物质上官能团的变换反应等。Ethanol and methyl acrylate as two kinds of additive at 0%, 4%, 8%, 12%, 16%, and 20% were added to bio-oil to study their effects on the stability of bio-oil during storage within 42d at 25℃ At the same time, GC-MS and Fourier Transform Infrared Spectroscopy methods were used to analyze the chemical composition of the bio-oil before and after storage. The results showed that both 12% of ethanol and 16% of methyl acrylate can reduce the kinematic viscosity and improve the stability of bio-oil obviously. After 42d storage, kinematic viscosities of bio-oil with no additive, 12% of ethanol and 16% of methyl acrylate were 23.55mm2/s, 10. 81mm2/s and 9.67mmZ/s, respectively, which were 49.71% , 17.40% and 29.60% higher than those of bio-oil before storage. Ethanol was better than that of methyl acrylate at the same condition in terms of reducing kinematic viscosity of bio-oil. At the same time, adding additives in the bio-oil can increase its pH and reduce its water content. The results of the GC-MS and Fourier Transform Infrared Spectroscopy analysis showed that there was a series of reactions inside the bio-oil, such as the generation of some oxygen-containing heterocyclic compounds and the transform reaction of the functional groups on the benzene ring of the benzene and phenol compounds.

关 键 词：热裂解 生物油 稳定性 添加剂 

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]