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以生物油脂为原料,通过裂解和酯化两个反应过程分别生成3种新的生物油脂裂解燃油(大豆油裂解燃油SBPF、皂脚裂解燃油SSPF、地沟油裂解燃油HWPF)。将3种生物燃油以不同的添加量分别添加到脂肪酸甲酯类生物柴油中,研究其组成含量对低温流动性能的影响。结果表明:常规的生物柴油凝点和冷滤点分别为11℃和12℃,通过添加20%皂脚裂解燃油,可使其凝点和冷滤点分别降至4℃和7℃。通过差示扫描热量分析,可知调合后可略微降低油品的析蜡温度,并且其降凝效果符合共晶理论。通过析蜡结晶物的GC-MS分析验证,生物油脂裂解燃油的加入主要是改变结晶特性,而对析出的蜡晶的组成及其含量无影响。
Using bio-oil as raw material, three kinds of new biodiesel pyrolysis fuels (soybean oil pyrolysis fuel SBPF, soapstock pyrolysis fuel SSPF and waste oil pyrolysis fuel HWPF) were respectively generated through two reaction processes of pyrolysis and esterification. The three kinds of bio-fuels were added to the fatty acid methyl ester biodiesel with different added amount respectively to study the influence of the composition of the bio-diesel on the low-temperature flowability. The results showed that the conventional freezing point of biodiesel was 11 ℃ and 12 ℃, respectively, and the freezing point and cold filter point of the biodiesel were reduced to 4 ℃ and 7 ℃ respectively by adding 20% soap oil. Through differential scanning calorimetry analysis, it can be seen that after the blending, the wax precipitation temperature of the oil product can be slightly reduced, and the pitting reduction effect conforms to the eutectic theory. By GC-MS analysis of wax crystals, it was confirmed that the addition of bio-oil cracked fuels mainly changes the crystallization characteristics, but has no effect on the composition and content of wax crystals precipitated.