摘要
以大豆油为原料,经催化裂解、精馏、芳构化和加氢过程制备生物航煤,并分析了其组成及理化性能;进一步采用活塞式航空发动机进行发动机台架试验,对比分析了生物航煤与RP-3燃料的燃用适用性。研究结果表明:生物航煤的基本组成为直链烷烃74.54%、环烷烃13.04%、芳香烃10.31%、醚类1.07%和非α-链烯烃1.04%;生物航煤的热值较高(44.4 MJ/kg),冰点低(-48℃),但黏度较高(2.11 mm^2/s)。与RP-3燃料相比,生物航煤具有更低的启动温度;温升速度(相差4℃之内)、油耗(相差小于0.02 g/s)与RP-3燃料接近,当发动机转速超过4200 r/min时,过量空气系数波动较大(0.8~1.2),燃烧状态恶化。台架试验后发动机拆解检查发现,燃用生物航煤后出现结焦积炭现象,这是由于该批次生物航煤黏度较大(>2 mm 2/s),对雾化效率、燃烧充分程度等发动机工作性能产生影响。
Bio aviation kerosene was prepared from soybean oil by catalytic cracking,distillation,aromatization and hydrogenation,and its composition and physicochemical properties were analyzed.A piston aero-engine was used to start the bench test,and the applicabilities of bio aviation kerosene and RP-3 fuel were compared and analyzed.The results showed that the basic components of bio aviation kerosene were straight-chain alkanes 74.54%,naphthenes 13.04%,aromatic hydrocarbons 10.31%,ethers 1.07%and non-alpha-chain olefins 1.04%.The calorific value of bio aviation kerosene was high(44.4 MJ/kg),freezing point was low(-48℃),but its viscosity was high(2.11 mm^2/s).Compared with RP-3 fuel,bio aviation kerosene had lower start-up temperature;temperature rise rate(within 4℃difference),fuel consumption(less than 0.02 g/s difference)were close to those of RP-3 fuel,the excess air coefficient fluctuated greatly(0.8-1.2)when engine speed exceeded 4200 r/min,and those of combustion state deteriorated;engine disassembly inspection after bench test showed that coking occured after burning bio aviation kerosene.The phenomenon of carbon deposition was due to the high viscosity(>2 mm 2/s)of bio aviation kerosene in this batch,which had an impact on the working performance of engines such as atomization efficiency and combustion adequacy.
作者
杨飞
陈伟
张晨
罗刚
徐俊明
李芳琳
YANG Fei;CHEN Wei;ZHANG Chen;LUO Gang;XU Junming;LI Fanglin(Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Institute of Chemical Industry of Forest Products,CAF,Nanjing 210042,China)
出处
《生物质化学工程》
CAS
北大核心
2019年第6期15-21,共7页
Biomass Chemical Engineering
基金
国家自然科学基金资助项目(31770612)
