Properties of Inorganic Salts in Diesel Exhaust PM2.5 from Heavy-duty Diesel Engine: Application of Waste Cooking Oil Biodiesel Blends and Diesel Particulate Filters with Diesel Oxidation Catalyst

• Main Authors: Yu-liang Liu, 劉育良
• Other Authors: Ying-I Tsai
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/hq4k75

碩士 === 嘉南藥理科技大學 === 環境工程與科學系暨研究所 === 99 === This study used biodiesel from waste cooking oil in different proportions, added to commercially available diesel fuel. Biodiesel is divided into three in the order of commercially available super-diesel (B2), 10% biodiesel (B10), 20% biodiesel (B20). The water-soluble ions in the diesel PM2.5 aerosol was acquired from diesel engine under the load conditions of 0%, 25%, 50%. Additionally, comparison with a variety of biodiesel in different loads, the tests of applying the diesel particulate filter (DPF) installation of catalytic oxidizer (DOC) of the exhaust emissions characteristics are carried out. The results show that the amount of waste cooking oil to add more to reduce emissions of water-soluble ions in PM2.5 aerosol particles. Based on B2 diesel at 0% load, total ion concentration of the exhaust PM2.5 under the installation of DPF with DOC has the reduction efficiency up to 95%. At 50% load, B10 diesel fuel with DPF plus DOC has reduction efficiencies of up to 92.2%. At 25 % load, B20 with DPF plus DOC has emission reduction efficiency of inorganic salts reached as high as 85.7%. Applying the same biodiesel, the higher the load the inorganic salts in PM2.5 particulate will be increased. The regenerated DPF with DOC using B2 diesel under different load has a good reduction efficiencies with about 24~48% decrease in inorganic salts. Regeneration of DPF will have to extend the life of the reduction effect. DPF with smaller aperture will reduce the aerosol particles in the water-soluble ion concentration, indicating the performance of reduction efficiency will increase. Contrastively, the longer length of DPF will reduce its effectiveness.