共查询到20条相似文献,搜索用时 62 毫秒
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利用非离子表面活性剂复配,对热解生物油/柴油混合液进行一系列乳化实验,测量乳化油的密度、热值、pH值.以乳化油的稳定性为实验指标,研究乳化剂种类、乳化剂用量、生物油含量对乳化油稳定性的影响.实验结果表明:在乳化温度为40℃(水浴),乳化时间为30min的条件下,以2%用量的Span80和Tween80复配乳化剂乳化生物油含量为20%的生物油/柴油混合液效果最佳.另外,随着生物油含量的增加,乳化油密度逐渐增加,热值与pH值逐渐减小. 相似文献
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生物柴油与F-T柴油混合燃料的理化特性研究 总被引:1,自引:0,他引:1
对不同比例生物柴油与F-T柴油混合燃料(生物柴油体积含量分别为0%,10%,20%,30%,40%,50%,60%,70%,80%,90%,100%)的密度、硫含量、黏度、闪点、馏程、凝点、冷滤点等理化性质及动力性进行了测试与研究。结果表明,生物柴油与F-T柴油能以任意比例互溶;混合燃料的各理化特性随生物柴油含量的增加而增大;B50F是理化特性最接近0#柴油的混合燃料;与燃用0#柴油相比,燃用B0,B50F及B100后,柴油机输出功率和扭矩均有所降低。 相似文献
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利用色谱-质谱联用仪测量了生物柴油的酯类组成,分析了燃料的密度、运动粘度、元素组成、弹性模量、碘值、氧化安定性等理化特性对燃烧温度的影响.结果表明:生物柴油中含有大量的不饱和脂肪酸甲酯,主要是油酸甲酯、亚油酸甲酯和棕榈酸甲酯;生物柴油较大的密度、较高的含氧量和碘值、较大的弹性模量、含有较长的碳链、较差的氧化安定性、存在双键且双键位置偏向分子中间会导致燃烧温度升高,而较大的运动粘度会使燃烧温度降低. 相似文献
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乙醇-柴油混合燃料的理化特性研究 总被引:8,自引:1,他引:7
对乙醇-柴油燃料直接影响发动机性能和燃料的使用、存储和运输的几种基本物理化学性质进行了研究。通过对不同比例(乙醇含量分别0.2%、0.5%、1%、2%、5%、10Yoo、15%、20%、25%、75%)的混合燃料的密度、粘度、闪点、表面张力、十六烷值、稳定性和磨损性等理化性质的测试和研究,总结出了乙醇含量对混合燃料物性参数的影响规律,归纳出各种参数随温度变化的规律。以密度为特征参数,拟合出混合燃料粘度、表面张力随密度变化的关系,得到了具有较高精度的乙醇一柴油混合燃料的理化特性经验关系式。 相似文献
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Abhishek Sharma Ahmad F. Sherwani Mukhtar Ahmad 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2018,40(22):2753-2770
Fast exhausting fossil fuel reserves and high rise in the air pollution levels due to combustion of these fuels bound us to discover some cleaner and environment-friendly fuels for the engines. Biodiesel from edible and non-edible seed oils has been identified as a better alternate of the diesel fuel in engines with a little sacrifice in terms of power output but with an improvement in exhaust emissions. The aim of the present research work is to optimize the input parameters of diesel engine running on Polanga biodiesel to improve performance and exhaust emissions. The input parameters selected for optimization are fuel injection timing, fuel injection pressure, Polanga biodiesel blend, and engine load with respect to brake thermal efficiency, brake specific fuel consumption, hydrocarbon emission, smoke opacity, and emission of nitrogen oxides. Relative weights of the response variables were calculated by standard deviation. The optimum combination of input parameters was obtained by Taguchi-based Multi-Objective Optimization by Ratio Analysis. Experiments were performed according to Taguchi’s L16 orthogonal array in a random manner in which three replicates of each experiment were noted. The optimum combination of input parameters for maximum performance and minimum exhaust emissions found to be as fuel injection timing 27° bTDC, fuel injection pressure –? 220 bar, biodiesel blend –? B40, and engine load –? 60%. The optimum values of the response variables, at the obtained optimum combination of input parameters, were predicted by Taguchi method and then verified experimentally and a good relation was found between them. These optimum values found to be as brake thermal efficiency –? 36.351%, brake specific fuel consumption –? 0.322 kg/kW-h, hydrocarbon emission –? 2.193 ppm, smoke opacity –? 80.925 HSU, and NOx emission –? 690.987 ppmv. 相似文献
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In biodiesel production, downstream purification is an important step in the overall process. This article is a critical review of the most recent research findings pertaining to biodiesel refining technologies. Both conventional refining technologies and the most recent biodiesel membrane refining technology are reviewed. The results obtained through membrane purification showed some promise in term of biodiesel yield and quality. Also, membranes presented low water consumption and less wastewater discharges. Therefore, exploration and exploitation of membrane technology to purify crude biodiesel is necessary. Furthermore, the success of membrane technology in the purification of crude biodiesel could serve as a boost to both researchers and industries in an effort to achieve high purity and quality biodiesel fuel capable of replacing non-renewable fossil fuel, for wide range of applications. 相似文献
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生物柴油的研究和应用进展 总被引:4,自引:0,他引:4
生物柴油作为一种可再生的替代能源,以其良好的环境效应受到越来越多的关注。生物柴油的使用可以减少S02,C02,CO,HC及颗粒排放。中国有丰富的植物油资源,促进生物柴油的应用不仅可以改善机动车的排气污染,而且能刺激中西部地区的农村经济发展,并对生物柴油的研究和应用进行了简单回顾。 相似文献
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In the present study, a comparative analysis of enrichment of hydrogen alongside diesel fuel and two different sources of biodiesel namely rice bran oil is an edible oil, and karanja oil being non-edible is tested. Hydrogen at a fixed flow rate of 7 lpm is inducted through the intake manifold. A total of six fuel samples are considered: diesel (D), hydrogen-enriched diesel (D + H2), hydrogen-enriched 10, and 20% rice bran biodiesel blend (RB10 + H2 and RB20 + H2), and hydrogen-enriched 10 and 20% karanja biodiesel blend (KB10 + H2 and KB20 + H2). Results indicate that enrichment of hydrogen improves combustion and results in 2.5% and 1.6% increase in the brake thermal efficiency of diesel fuel and rice bran biodiesel, respectively. For karanja biodiesel the increment is negligible. Fuel consumption of the D + H? is 6.35% lower and for RB10 + H? and KB10 + H? it is decreased by 2.9% and 1.3%, respectively. The Presence of hydrogen shows the 4–38% lower CO emissions and 6–14% lower UHC emission due to better combustion. The blends RB10 + H? and KB10 + H? produce up to 6–13% higher NOx emission and that for the blends RB20 + H? and KB20 + H? it goes up to 25%. Overall rice bran oil is found to provide better performance than karanja biodiesel. 相似文献