生物油/柴油乳化燃料的燃烧特性

为了研究生物油/柴油乳化燃料的燃烧特性，利用非离子表面活性剂复配，对热解生物油/柴油混合液进行了乳化，测量了乳化燃料的密度、热值、动力黏度及pH值。在SD1110型柴油机台架上进行4种不同配比的生物油/柴油乳化燃料的发动机台架试验，得出了柴油机燃用生物油/柴油乳化燃料和纯柴油的负荷特性和排放特性曲线，并且对乳化燃料和纯柴油的排放特性进行了对比。研究结果表明：生物油体积分数为20%的乳化燃料当量油耗率最低，乳化燃料CO的排放高于柴油的排放，且生物油含量越高CO排放越大，而乳化燃料的NO及碳烟的排放则优于纯柴油的排放。由于生物油/柴油乳化燃料的理化特性与柴油接近，可以作为普通柴油机的燃油使用。

Combustion characteristics of emulsified fuel from bio-oil/diesel oil

Pyrolysis derived bio-oil was emulsified by diesel oil with complex of nonionic surfactants. The density, calorific value, dynamic viscosity and pH value of the emulsified fuel were measured. The performance of bio-oil/diesel oil emulsified fuels with four different bio-oil/diesel oil ratios were tested on a SD1110 diesel engine, and the engine load characteristics and exhaust emission characteristics curves of diesel engine were determined. Then, the fuel economy and exhaust emission characteristics of the engine fueled with the emulsified fuel were analyzed in comparison with that of the pure No.0 diesel oil. The experimental results showed that the specific fuel consumption was the lowest, when the engine was fueled with the emulsified fuel containing about 20% volume fraction of bio-oil. CO emission of emulsified fuel was higher than that of diesel oil, and the high concentration of bio-oil was, the more CO emission was. But the NO and smoke emissions of the emulsified fuels were lower than that of the pure No.0 diesel oil. Since its physical and chemical characteristics are similar to that of diesel, bio-oil/diesel oil emulsified fuel can be used to fuel diesel engines.