期刊
FUEL
卷 290, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2020.120039
关键词
Diesel engine; Selective catalytic reduction; NOx emission; Diesel oxidation catalyst
资金
- Natural Science Foundation of Guangxi [2018GXNSFAA281267, 2018GXNSFAA294072]
- Guangxi Young and middle-aged college Teachers Basic Research Ability Promotion Project [2020KY39008]
- Key Scientific Research Projects of Guangxi Vocational & Technical Institute of Industry [2019015KY025]
The paper investigates the effects of Fe2O3 based diesel oxidation catalyst and selective catalytic reduction catalyst on engine characteristics of diesel engine fueled with biodiesels. The results show that biodiesel fuel reduces CO and HC emissions, but increases NOx emissions slightly.
The Fe2O3 catalyst exhibits excellent activity in the reduction of nitrogen oxides. However, the improvement of its high-temperature stability is a well-known challenge in application of diesel engine fueled with biodiesels. The paper offers an investigation on the effects of Fe2O3 based diesel oxidation catalyst and selective catalytic reduction catalyst on the engine characteristic of diesel engine fueled with biodiesels and diesel in the experimental study. The catalyst of Al2O3-Nb2O5/CeO2/Fe(2)O(3 )was produced with the impregnation method. The characteristics of selective catalytic reduction catalyst and diesel oxidation catalyst were investigated in term of CO, smoke, NOx, CO2 and O-2 emissions. In addition, the engine combustion characteristic was studied in term of brake specific fuel consumption, exhaust temperature and excessive air factor. The experiments were carried out with a four cylinders electronic control diesel engine under a constant engine speed of 1000 rpm and various engine loads. The results show that the average increases of BSFC are 10.60%, 5.35% and 5.22% for diesel, RME and CSME catalyst, respectively. In addition, applying of biodiesel fuel drops in CO by 35%, HC by 64%, and smoke by 45% in average, whereas NOx growths by 11% at medium and high loads. The NO conversions of diesel engine fueled with diesel, rapeseed methyl ester and cottonseed methyl ester are up to 72.3%, 81.3% and 78.6%, respectively. Similarly, NOx conversions are up to 76.1%, 82.3% and 83.5%, respectively.
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