生物油/柴油均相体系的制备及其腐蚀特性  

Preparation and corrosion behavior of homogeneous blends of biomass fuel/diesel

作　　者：徐玉福[1] 周丽丽[1] 胡献国[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009

出　　处：《农业工程学报》2011年第9期271-275,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(50875071);安徽省自然科学基金项目(11040606Q37);合肥工业大学科学研究与发展基金项目(080204F)

摘　　要：中温快速热解得到的生物油具有酸值大、含氧量高、热值低等缺点,必须进行改性后才能作为燃油使用。根据亲水亲油平衡(HLB)原理,利用表面活性剂把生物油和0#柴油进行乳化,制备出乳化生物油,以降低酸值,改善其性能。分别考察了在25℃及50℃下乳化生物油对紫铜、不锈钢、铝合金和铅等4种常见金属的腐蚀特性,借助扫描电镜(SEM)和X射线能谱仪(EDS)等手段对其腐蚀表面与产物进行了测试表征。结果表明:乳化生物油对金属的腐蚀程度依次为:铝合金>铅>紫铜>不锈钢;并且随着温度的升高,乳化生物油对金属的腐蚀性增强,腐蚀的机理主要是在金属表面生成氧化物。Bio-oil produced by medium temperature fast pyrolysis has disadvantages of high acid, high oxygen content and low heating value and can be used as fuel after some modification process. In terms of Hydrophilic-Lipophilic Balance （HLB） principle, bio-oil was emulsified with number zero diesel fuel to reduce the acid value and improve its performance. SEM, EDS and other analytical techniques were used to analyze the corroded metal surface after four general metals （pure copper, stainless steel, aluminum alloy and lead） were corroded at 25℃ and 50 ℃ respectively. The results showed that the corrosion degree of metals caused by emulsification biological oil was in sequence of aluminum alloy lead pure copper stainless steel. Moreover, the higher temperature, the more serious corrosion to metals. The corrosion mechanism was ascribed to generate the metal oxide on the metal surfaces.

关 键 词：生物油 乳化 腐蚀 金属 

分 类 号：TK6[动力工程及工程热物理—生物能]