甲醇发动机的醛酮类污染物排放特性研究  

Study on Carbonyl Compounds Emissions from a Methanol Engine

作　　者：尤可为[1,2] 郑贺悦[1] 王务林[1] 舒歌群[2] 郭家强[1] 葛蕴珊[3] 谭建伟[3] 何超[3] 刘志华[3] 

机构地区：[1]中国汽车技术研究中心,天津300162 [2]天津大学内燃机燃烧学国家重点试验室,天津300072 [3]北京理工大学机械与车辆工程学院,北京100081

出　　处：《内燃机工程》2009年第6期5-9,共5页Chinese Internal Combustion Engine Engineering

摘　　要：在一台燃用纯甲醇的电控点燃式发动机上，通过台架试验研究了其常规气体污染物和醛酮类污染物的排放特性。研究结果表明：三效催化器对甲醇发动机的常规污染物和非常规污染物排放均有良好的净化效率，催化器后的常规污染物排放能够满足GB14762—2002的排放限值；甲醇发动机排放的醛酮类污染物以甲醛、乙醛、丙烯醛和丙酮等C1～C3污染物为主，而C3以上的醛酮类化合物占排气中醛酮总量的比例较小；醛酮污染物的比排放量随着发动机负荷的增加先减少后增加，随着转速上升明显增加。The regulated air pollutants （CO, THC, NO.r） and carbonyl compounds emitted from an electronically controlled engine fueled with methanol were measured on a chassis dynamometer. The results show that the three way catalytic converter （TWC） has a better conversion efficiency for regulated and un- regulated air pollutants. The emissions of regulated air pollutants （CO, THC, NOx） after TWC can reach the limits specified by GB 14762--2002. The C1 ~C3 pollutants of formaldehyde, acetaldehyde, acrolein and acetone are the main carbonyl compounds emitted from the methanol engine. The specific emission of carbon- yl compounds changes from decreasing trend to increasing trend with the increase of engine load, and it increases with the increase of engine speed.

关 键 词：内燃机 甲醇发动机 醛酮类化合物 甲醛 排放 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]