隨著工業的發展,當石化能源在大量使用的狀況下,所產生大量廢氣污染物及溫室效應等問題,是柴油引擎大量應用於船舶和車輛等交通工具為其主因之ㄧ,而其產生的廢氣對人體有害,又於石化能源蘊藏量有限的狀況下,必須尋找替代性能源以減低廢氣排放量和對石化能源的使用量。本研究利用醇類燃料的高含氧量和低含碳量的特性,來降低柴油引擎廢氣排放中的汙染物的濃度,於實驗中所使用的兩種添加燃料有高純度丁醇和高純度丁醇中混合5wt%的蒸餾水等兩種丁醇混合燃料,並將這兩種添加燃料混合於市售超級柴油中,且在不改變原單缸直噴式柴油引擎的原設計參數下進行柴油的引擎性能、燃油消耗率和廢氣排放等之探討。其研究結果顯示,這兩種丁醇混合燃料相較於超級柴油,其BSFC和HC濃度均較高,且BMEP均較低,又Smoke濃度、NOx濃度和EGT值均較低。另在兩種丁醇混合燃料的相較之下,雖有添加蒸餾水的丁醇混合燃料相較於高純度丁醇混合燃料的BSFC值較高,但其Smole濃度、NOx濃度、HC濃度和EGT均較低,又BMEP值亦較高。
With industrial developing, fossil energies are widely used; they produce some problems like a large number of exhaust pollutants and the greenhouse effect. In this study, we use the characteristics of the high oxygen content and low carbon content of the alcohol fuel to reduce the concentration of pollutants in the exhaust emissions from diesel engines. In the procedure, the super diesel fuel is added by 90 wt% with high-purity butanol additive and 5 wt% water-contented butanol additive in non-modified diesel engine, respectively. The results show that the butanol mixed fuel has higher BSFC value, higher HC emissions and lower BMEP value than super diesel fuel, however, the Smoke, NOx, exhaust gas temperature are lower than super diesel; the butanol mixed fuel with water-contented additive also has higher BSFC value and BMEP value, yet the Smoke, Nox, HC emission levels, and exhaust gas temperature are lower than the butanol mixed fuel without water.