摘要
文章搭建了流反应器试验台,并将流反应器安装在发动机排气管中,借助发动机的高温排气对流反应器进行加热,研究排气温度环境下醇氧化产生醛的特性。研究结果表明:甲醇和乙醇的氧化率均随着排气温度的升高而增大,在流反应器前40 cm的排气高温区,甲醇和乙醇快速氧化,降低标准气的流速可以提高甲醇和乙醇的氧化率;当标准气流速为5 m/s,甲醇和乙醇标准气的温度分别低于863 K和813 K时,甲醛和乙醛在流反应器内不断生成并累积,提高标准气流速能够使其质量浓度降低;当甲醇和乙醇标准气的温度分别高于913 K和863 K时,随着流反应器长度的增加,甲醛和乙醛经历了快速生成然后快速氧化的过程,甲醛和乙醛的质量浓度呈现出先升高后降低的变化趋势;提高标准气流速能够使流反应器出口处的甲醛和乙醛的质量浓度升高。
Alcohol fuel oxidation test bench, a flow reactor, was established. A flow reactor was installed into the engine exhaust pipe, in which the sample gas flowed under the high exhaust temperature environment. The characteristics of alcohols and aldehydes oxidation along the engine exhaust pipe were investigated in a flow reactor. The results show that methanol and ethanol oxidation rate increase with increasing temperature and decreasing flow rate. Methanol and ethanol are rapidly oxidized in the first 40 cm length of the flow reactor. When the flow rate is 5 m/s and the temperature is lower than 863 K and 813 K respectively, formaldehyde and acetaldehyde are continuously generated in the flow reactor. The aldehydes concentration decrease with increasing flow rate. When the temperature is higher than 913 K and 863 K respectively, formaldehyde and acetaldehyde are rapidly oxidized after generating, and the aldehydes concentration increase at the outlet of flow reactor with increasing flow rate.
作者
曹智焜
刘方杰
徐斌
王站成
苗家轩
胡宜康
Cao Zhikun;Liu Fangjie;Xu Bin;Wang Zhancheng;Miao Jiaxuan;Hu Yikang(Vehicle and Traffic Engineering School,Henan University of Science and Technology,Luoyang 471003,China)
出处
《可再生能源》
CAS
北大核心
2019年第11期1589-1594,共6页
Renewable Energy Resources
基金
国家自然科学基金资助项目(51506047)
河南省科技计划项目(182102410086)
河南省高等学校重点科研项目(15A470011)
关键词
醇醛排放
甲醇
乙醇
甲醛和乙醛
unregulated emissions
methanol
ethanol
formaldehyde and acetaldehyde
作者简介
通讯作者:刘方杰(1983-),男,博士,讲师,研究方向为清洁代用燃料发动机的燃烧与排放。E-mail:liufangjie@haust.edu.cn。
