Diesel Engine Performance, Emissions and Combustion Characteristics of Biodiesel and Its Blends Derived from Catalytic Pyrolysis of Waste Cooking Oil

被引：32

作者：

Mohamed, Mohamed ^{[1
,2
]}

Tan, Chee-Keong ^{[1
]}

Fouda, Ali ^{[3
]}

Gad, Mohammed Saber ^{[4
]}

Abu-Elyazeed, Osayed ^{[5
]}

Hashem, Abdel-Fatah ^{[2
]}

机构：

[1] Univ South Wales, Sch Engn, Pontypridd CF23 1DL, M Glam, Wales

[2] South Valley Univ, Fac Engn, Dept Mech Engn, Qena 83523, Egypt

[3] Mansoura Univ, Fac Engn, Dept Mech Power Engn, Mansoura 35516, Egypt

[4] Fayoum Univ, Fac Engn, Mech Engn Dept, Al Fayyum 63514, Egypt

[5] Helwan Univ, Fac Engn, Dept Mech Engn, Mataria 11795, Egypt

来源：

ENERGIES | 2020年 / 13卷 / 21期

关键词：

biodiesel; waste cooking oil (WCO); pyrolysis; emissions; combustion characteristics; VEGETABLE-OILS; CO-PYROLYSIS; METHYL-ESTER;

D O I：

10.3390/en13215708

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper first describes a slow catalytic pyrolysis process used for synthesizing biodiesel from waste cooking oil (WCO) as a feedstock. The influence of variations in the catalyst type (sodium hydroxide and potassium hydroxide), and catalyst concentration (0.5, 1.0, 3.0, 5.0, 7.0 and 10.0% by weight) on both the pyrolysis temperature range and biodiesel yield were investigated. The results suggested that sodium hydroxide (NaOH) was more effective than potassium hydroxide (KOH) as catalysts and that the highest yield (around 70 wt.%) was observed for a NaOH concentration of about 1 wt.% The resultant pyrolysis temperature range was also significantly lower for NaOH catalyst, thus suggesting overall lower energy consumption. Compared to conventional diesel, the synthesized biodiesel exhibited relatively similar physical properties and calorific value. The biodiesel was subsequently blended with diesel fuel in different blend ratios of 0, 20, 40, 60, 80 and 100% by volume of biodiesel and were later tested in a compression ignition engine. Brake thermal efficiency and specific fuel consumption were observed to be worse with biodiesel fuel blends particularly at higher engine load above 50%. However, NOx emission generally decreased with increasing blend ratio across all engine load, with greater reduction observed at higher engine load. Similar observation can also be concluded for CO emission. In contrast, lower hydrocarbon (HC) emission from the biodiesel fuel blends was only observed for blend ratios no higher than 40%. Particulate emission from the biodiesel fuel blends did not pose an issue given its comparable smoke opacity to diesel observed during the engine test. The in-cylinder peak pressures, temperature and heat release rate of biodiesel fuel blends were lower than diesel. Overall, biodiesel fuel blends exhibited shorter ignition delays when compared to diesel fuel.

引用

页数：13

共 36 条

[1] On biodiesels from castor raw oil using catalytic pyrolysis [J].