本研究採用的生質柴油是來自不同比例的廢食用油，添加於市售柴油中。生質柴油分為三種，依序為市售超級柴油(B2)、10%生質柴油(B10)、20%生質柴油(B20)。採集柴油引擎所產生的廢氣微粒，探討在0%、25%、50%的負載下，所排放PM2.5氣膠微粒水溶性離子濃度。並比較各種生質柴油在不同的負載下，濾煙器(DPF)加裝觸媒氧化器(DOC)所排放出廢氣特性。其結果顯示廢食用油添加量越多，將降低排放PM2.5氣膠微粒水溶性離子濃度。B2柴油在0%負載下，加裝DPF with DOC濾煙器後，其廢氣PM2.5之總離子排放濃度減量效率高達95%，B10柴油在50%負載下減量效率高達92.2%， B20在25%負載下柴油減量效率高達85.7%，在相同的油品負載量越高所排放PM2.5氣膠微粒物種濃度隨之增高。使用B2柴油，其DPF with DOC再生後，對微粒排放的總離子量具有減量效果，不同負載下總離子減量約24~48%，以在25%負載下的減量效果最佳。
再生後的觸媒轉化器將有延長壽命的減量效果。對濾煙器而言，孔徑越小將降低氣膠微粒中水溶性離子濃度，使之效能增加，相反的長度越長將降低其效能。使用濾煙器的B2柴油引擎廢氣排放PM2.5微粒離子含量，三種規格的濾煙器在0%及50% 長度250mm 孔徑100csi 直徑250mm減量效率50%-85%，在負載25%下濾煙器長度305mm、孔徑200csi、直徑250mm減量效率76%。對於廢氣PM2.5微粒陰陽離子減量均具有明顯效果，其中負載0%、50%下長度250mm;孔徑100csi濾煙器對於廢氣PM2.5微粒離子50%-85%的減量效果最佳。 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.
