ABSTRACT

Biodiesel is produced from the refined/edible type oils using methanol and an alkaline catalyst which is one of the environmentally friendly alternative liquid biofuels that has proven itself commercially, with international standards all around the world. In present investigation, mixture of two biodiesels in equal weight ratio namely Cucurbita pepo.L (pumpkin) and Tectona grandis (teak) seed oil was used for the synthesis of biodiesel with 5-ml Diethyl ether as additive. Performance test was made with the biodiesel blend using water-cooled, constant speed, CI engine, and emission characteristics were analyzed using a five-gas analyzer. It was observed that there was 35.5% increment in Brake Thermal efficiency and 25.8% reduction in Brake Specific Fuel consumption at maximum load for 200-ml pumpkin and teak biodiesel blend mixed to the diesel with additive. For this blend, it was observed at maximum load, the emission of Carbon monoxide reduced by 26.67% of diesel; Carbon di-oxide reduced by 12.96% and Nitrous oxide reduced by 26.57%. The emission gets increased in over load condition. Unburned Hydro Carbon emission and smoke opacity increased by 67.16 and 9.84%. The combustion characteristics of blended biodiesel with additive closely followed the diesel fuel operation. Hence, this blend was used as fuel in CI engine without engine modification.

摘要

生物柴油是使用甲醇和碱性催化剂从精制/可食用型油中生产的，而碱性催化剂是一种环保的替代液体生物燃料，已经在商业上证明了自己，并符合世界各地的国际标准。在本调查中，以相等的重量比例的两种生物柴油的混合物即西葫芦.L （南瓜）和柚木（柚木）种子油用于以5毫升乙醚为添加剂合成生物柴油。使用水冷，恒速，CI发动机对生物柴油混合物进行性能测试，并使用五气分析仪分析排放特性。观察到，在最大负荷下，将200毫升南瓜和柚木生物柴油混合物与添加剂混合后，制动热效率提高了35.5％，制动比燃料消耗降低了25.8％。对于这种混合物，在最大负荷下观察到，一氧化碳的排放量减少了柴油的26.67％。二氧化碳减少了12.96％，一氧化二氮减少了26.57％。在过载条件下，排放会增加。未燃烧的碳排放量和烟的不透明度分别增加了67.16和9.84％。掺混生物柴油与添加剂的燃烧特性与柴油运行密切相关。因此，这种混合物无需修改即可用作CI发动机的燃料。