改性生物柴油碳烟与NO_x排放试验  

Experiment on the Smoke and NO_x Emissions of Modified Biodiesel

作　　者：许广举[1] 王忠[1] 毛功平[1] 王小哲[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《农业机械学报》2011年第1期8-11,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50776042);江苏省重大项目(10KJA47009);江苏省创新项目(CX10B-261Z)

摘　　要：针对生物柴油氧化安定性较差、NOx排放偏高的情况,添加抗氧化剂(BHA)对生物柴油进行燃料改性,分析了抗氧化剂对生物柴油氧化安定性的影响,讨论了改性前、后生物柴油粘度随温度的变化规律。测量了高压共轨柴油机燃烧改性生物柴油的排放污染物随转速、负荷的变化规律。探讨了抗氧化剂改善生物柴油碳烟、NOx排放的作用机理。研究结果表明:燃料改性后,生物柴油的氧化安定性大幅度提高,燃油粘度略有降低;发动机的碳烟、NOx排放均明显下降,特别是在中、高负荷时效果显著;燃烧过程中抗氧化剂抑制了脂肪酸长链分子的高温裂解,促进了自由基的淬熄效应,由此改变了碳烟与NOx排放之间此消彼长的关系。Because of the poor oxidation stability and the high NOx emissions,biodiesel fuel was redesigned by adding anti-oxidants.The oxidation stability and viscosity of the biodiesel have been measured and analyzed.The engine experiment was conducted and it was fueled by biodiesel and BHA/biodiesel,NOxemission and smoke were measured.The mechanism of anti-oxidants to decrease the smoke,NOx emission was discussed.The results showed that BHA additive was a high effective antioxidant of biodiesel,the viscosity of biodiesel was decreased slightly;and the emission smoke and NOx was decreased significantly,especially at the high load condition.Anti-oxidants can restrain the high-temperature dissociation of long-chain fatty acid molecules during the combustion process,and it can promote the quenching effects of free radical.Also,it can change the ＂trade-off＂ tradition relationship between smoke and NOx emissions.

关 键 词：生物柴油 抗氧化剂 燃油品质 排放 试验 

分 类 号：TK427.126[动力工程及工程热物理—动力机械及工程] S216.2[农业科学—农业机械化工程]