共查询到20条相似文献,搜索用时 91 毫秒
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二甲醚(DME)是近几年被广泛看好的柴油及液化气替代燃料,文章论述了DME的用途及前景用途,阐述了二甲醚用作替代燃料的潜在优势。 相似文献
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本文针对国Ⅲ标准与普通柴油标准的主要技术指标进行了对比,介绍了中石油大港石化公司近年来为发展清洁柴油生产所进行的工艺流程与产品结构优化、新型加氢精制催化剂的研发与工业试验,通过合理的柴油调合比例分配,最大化的生产出两种标准柴油。并对今后实现更高标准柴油的生产工艺提出建议。 相似文献
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一种清洁能源--生物柴油的粘度试验研究 总被引:4,自引:2,他引:2
生物柴油是未来的一种重要能源。介绍、分析了生物柴油的粘度试验结果 ,并与欧洲生物柴油标准及我国矿物燃油指标进行了比较 ,结果表明 ,采用改进的连续管式反应器进行生物柴油的试验生产效果很好 相似文献
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国内外柴油氧化脱硫技术研究进展 总被引:3,自引:0,他引:3
介绍了国内外柴油产品质量与标准的发展趋势,以及国内外柴油氧化脱硫技术的研究进展,各种柴油氧化脱硫技术的优势及存在的问题,与加氢脱硫技术相比,氧化脱硫将成为今后生产超低硫柴油的主要工艺之一。 相似文献
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介绍了船舶柴油机分类,阐述了船舶柴油机润滑油的选用及船舶在用油的检测方法。船舶在用油的检测项目一般有6项,包括运动粘度、闪点、戊烷不溶物、水分、碱值和元素。详细分析了怎样依据油品质量的变化来判断设备可能出现的问题。 相似文献
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为更好的研究脂肪酸甲酯与柴油机油添加剂之间的交互作用,迚一步揭示生物柴油对柴油机油性能的影响。采用旋转氧弹法、热重法等手段研究了油酸甲酯与ZDDP的交互作用对柴油机油氧化安定性和热稳定性的影响,通过红外光谱分析了氧化前后柴油机油结构组成的变化,利用抗磨性试验考察并探讨了氧化前后油酸甲酯与ZDDP的交互作用对柴油机油抗磨性能的影响规律。结果表明:油酸甲酯显著劣化柴油机油的氧化安定性;油酸甲酯与ZDDP交互作用降低柴油机油的热稳定性;在给定试验条件下,油酸甲酯一定程度上改善了基础油的抗磨减摩性能,油酸甲酯与ZDDP交互作用会降低柴油机油的抗磨性能。 相似文献
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Cumali ?lk?l?ç 《Fuel Processing Technology》2011,92(9):1790-1795
In this study, performance and exhaust emissions of biodiesel in a compression ignition engine was experimentally investigated. Therefore, biodiesel has been made by transesterification from cotton seed oil and then it was mixed with diesel fuel by 25% volumetrically, called here as B75 fuel. B75 fuel was tested, as alternative fuel, in a single cylinder, four strokes, and air-cooled diesel engine. The effect of B75 and diesel fuels on the engine power, engine torque and break specific fuel consumption were clarified by the performance tests. The influences of B75 fuel on CO, HC, NOx, Smoke opacity, CO2, and O2 emissions were investigated by emission tests. The engine torque and power, for B75 fuel, were lower than that of diesel fuel in range of 2-3%. However, for the B75, specific fuel consumption was higher than that of diesel fuel by approximately 3%. CO2, CO, HC, smoke opacity and NOx emissions of B75 fuel were lower than that of diesel fuel. The experimental results showed that B75 fuel can be substituted for the diesel fuel without any modifications in diesel engines. 相似文献
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Measurement of number and size distribution of particles emitted from a mid-sized transportation multipoint port fuel injection gasoline engine 总被引:1,自引:0,他引:1
This study was carried out to characterize the engine-exhaust particulate emissions from a typical multipoint port fuel injection gasoline engine used in transportation sector. Though gasoline engine showed no visible tail pipe emissions yet its particle concentrations were comparable to mineral diesel, particularly at high engine loads. Average sizes of particles emitted in gasoline exhaust are found to be way smaller than particles emitted in diesel exhaust under similar operating conditions. The peak particle concentrations for mineral diesel never go below 40 nm size however for gasoline engine, it was as low as 20 nm for most engine operating conditions. Within a very limited operating range, gasoline engine performance was superior to its diesel counterparts in terms of particulate size and number distribution however it deteriorates very quickly as soon as the fuel-air mixture becomes closer to stoichiometric ratio, typically under high engine load and speed conditions. 相似文献
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为了有效回收柴油机排气余热能,通过实验研究了一台车用柴油机排气能量变化规律,进而设计有机朗肯循环(ORC)系统回收该柴油机的排气余热能,并基于粒子群算法,以净输出功率和(火用)效率为目标函数,选取蒸发压力、过热度和膨胀机膨胀比为优化变量,对ORC系统的运行参数进行了优化研究。优化结果表明,在柴油机不同运行工况条件下,存在最佳的蒸发压力、过热度和膨胀机膨胀比,从而使ORC系统的净输出功率和(火用)效率最优。根据运行参数优化结果,分析了ORC系统和车用柴油机-ORC联合系统(联合系统)的性能。研究结果表明,当柴油机转速为2200 r·min-1,转矩为1215 N·m时,ORC系统的净输出功率可达30.61 kW,联合系统的有效输出功提升率(POIR)可达9.86%;当柴油机转速为1200 r·min-1,转矩为1131 N·m时,联合系统的有效燃油消耗率(BSFC)为175.0 g·(kW·h)-1。 相似文献
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This paper describes an experimental study of using tyre pyrolysis oil (TPO) obtained from waste automobile tyres by vacuum pyrolysis method, as a fuel in diesel engine. In this work, performance and emission parameters of a single cylinder water cooled diesel engine running on TPO diesel reference fuel (RF) blends in steps of 20% on volume basis of TPO, viz. TPO20 up to TPO70 were used as fuels and the results compared with diesel operation. Results indicated that reliable operation can be achieved up to 70% of TPO diesel blends. Thermal efficiencies were lower compared to diesel operation. Higher smoke, HC and CO emissions were recorded in the experimentation. Oil sticking was occasionally found on the nozzle stem and sac. There was no corrosion in the injection system after running the engine with TPO–RF blends. 相似文献
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Chodchanok Attaphong Nattaya Morawan Piampoom Sarikprueck Ampira Charoensaeng Sutha Khaodhiar 《Journal of surfactants and detergents》2023,26(3):335-344
Microemulsification and blending are two viscosity-modifying techniques of vegetable oils for direct use with diesel engine. In this study, alcohol blends are mixtures of ethanol, diesel, and palm-oil biodiesel while microemulsion biofuels are thermodynamically stable, clear, and single-phase mixtures of diesel, palm oil, and ethanol stabilized by surfactants and cosurfactants. Although there are many studies on biofuels lately, there is limited research on using biodiesel as a surfactant in microemulsion formulations and applied on engine performance at different engine loads. Therefore, the objectives are to investigate phase stability and fuel properties of formulated biofuels (various blends and microemulsions), to determine the engine performance at different engine loads (no load, and from 0.5 to 2.0 kW), and to estimate laboratory-scale cost of the selected biofuels compared to diesel and biodiesel. The results showed that phase stability and fuel properties of selected microemulsion biofuels are comparable to diesel and biodiesel. These microemulsion biofuels can be applied to the diesel engine at different loads while diesel-ethanol blends and palm-oil-biodiesel-ethanol blends cannot be. It was found that the energy efficiencies of the system using microemulsion biofuels were slightly lower than the average energy efficiency of diesel engine. From this study, it can be summarized that microemulsion biofuels can be formulated using palm-oil biodiesel (palm-oil methyl ester) as a bio-based surfactant and they can be considered as environmentally-friendly alternatives to diesel and biodiesel. However, cost considerations showed that the raw materials should be locally available to reduce additional costs of microemulsion biofuels. 相似文献
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The influence of n-butanol/diesel fuel blends utilization on a small diesel engine performance and emissions 总被引:1,自引:0,他引:1
O?uzhan Do?an 《Fuel》2011,90(7):2467-9430
Nitrogen oxides and smoke emissions are the most significant emissions for the diesel engines. Especially, fuels containing high-level oxygen content can have potential to reduce smoke emissions significantly. The aim of the present study is to evaluate the influence of n-butanol/diesel fuel blends (as an oxygenation additive for the diesel fuel) on engine performance and exhaust emissions in a small diesel engine. For this aim five-test fuels, B5 (contains 5% n-butanol and 95% diesel fuel in volume basis), B10, B15, B20 and neat diesel fuel, were prepared to test in a diesel engine. Tests were performed in a single cylinder, four stroke, unmodified, and naturally aspirated DI high speed diesel engine at constant engine speed (2600 rpm) and four different engine loads by using five-test fuels. The experimental test results showed that smoke opacity, nitrogen oxides, and carbon monoxide emissions reduced while hydrocarbon emissions increased with the increasing n-butanol content in the fuel blends. In addition, there is an increase in the brake specific fuel consumption and in the brake thermal efficiency with increasing n-butanol content in fuel blends. Also, exhaust gas temperature decreased with increasing n-butanol content in the fuel blends. 相似文献
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《Fuel Processing Technology》2002,76(2):91-103
Jordan relies heavily on expensive and unreliable imported oil. Therefore, this study was initiated to investigate the potential of ethyl ester used as vegetable oil (VO; biodiesel) to substitute oil-based diesel fuel. The fuels tested were several ester/diesel blends including 100% ester in addition to diesel fuel, which served as the baseline fuel. Variable-speed tests were run on all fuels on a standard test rig of a single-cylinder, direct-injection diesel engine. Tests were conducted to compare these blends with the baseline local diesel fuel in terms of engine performance and exhaust emissions. The results indicated that the blends burned more efficiently with less specific fuel consumption, and therefore, resulted in higher engine thermal efficiency. Furthermore, the blends produced less carbon monoxide and unburned hydrocarbons than diesel fuel. The 100% ester fuel and the blend of 75:25 ester/diesel gave the best performance while the 50:50 blend consistently resulted in the lowest amounts of emissions over the whole speed range tested. 相似文献