摘要
为研究碘值对生物柴油燃烧颗粒物排放特性的影响,采用颗粒物粒径谱仪和碳分析仪对不同原料生物柴油燃烧颗粒物的粒径分布和碳质组分进行分析。结果表明,在发动机最大转矩转速2400 r/min、100%负荷下,燃用生物柴油最大爆发压力、燃烧温度和燃烧持续期均高于柴油,且碘值越大,燃烧持续期越短。燃用生物柴油可有效降低颗粒物排放,最大降幅达85%,且颗粒物粒径减小;碘值越大,颗粒物生成数量越多,碘值较大的大豆油甲酯颗粒物排放量是碘值低的地沟油甲酯颗粒物的5.3倍。颗粒物碳质组分中有机碳(OC)主要组成是OC1和OC4,其质量占总碳(TC)质量的60%以上;元素碳(EC)主要组分是EC2,其质量占EC质量的50%以上。柴油颗粒物OC和EC的质量比R为7.4,生物柴油颗粒物的R为18.2~24.5,且生物柴油碘值越大,R越大。选用碘值较小的生物柴油,能更有效地降低颗粒物的排放。
In order to study the effect of iodine value on the emission characteristics of biodiesel combustion particulate matter,the engine exhaust particle sizer and carbon analyzer were used to analyze the particle size distribution and carbon component of particulate matter from different biodiesels.The results show that the maximum explosion pressure,combustion temperature and combustion duration of three biodiesels are higher than that of diesel at the maximum engine torque speed 2400 r/min and 100%load.The greater the iodine value is,the shorter the combustion duration becomes.The use of biodiesel can effectively reduce the amount of particulate matter emissions,with a maximum reduction of 85%,and the particle size of biodiesel particles is decreased.The higher the iodine value is,the more the particulate matter is produced.The emission concentration of soybean oil methyl ester particles with larger iodine value is 5.3 times that of waste oil methyl ester particles with lower iodine value.The main components of organic carbon(OC)in the carbonaceous component of particulate matter are OC1 and OC4,which account for more than 60%of the total carbon(TC).The main component of elemental carbon(EC)is EC2,which accounts for more than 50%of the total EC.The ratio of diesel particulate organic carbon(OC)to elemental carbon(EC)in the carbonaceous component of particulate matter is 7.4,and the biodiesel OC/EC value is 18.2-24.5.The higher the iodine value of biodiesel,the higher the OC/EC value of particulate matter carbon component.Using biodiesel with lower iodine value can reduce particulate matter emission more effectively.
作者
杜家益
杨启航
张登攀
王益凡
蒋胜
袁银男
DU Jiayi;YANG Qihang;ZHANG Dengpan;WANG Yifan;JIANG Sheng;YUAN Yinnan(School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;School of Energy,Soochow University,Suzhou,Jiangsu 215006,China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2021年第5期18-24,共7页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51876133)。
关键词
生物柴油
颗粒物
碘值
粒径分布
碳质组分
biodiesel
particulate matter
iodine value
particle size distribution
carbon component
作者简介
杜家益(1968-),男,副教授;通信作者:张登攀,男,讲师。
