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中低温煤焦油加氢改质工艺研究 总被引:6,自引:0,他引:6
在小型固定床加氢装置上,用加氢精制催化剂和加氢裂化催化剂对陕北的中低温煤焦油进行加氢改质工艺研究.着重考察反应温度、反应压力、氢油体积比和液体体积空速对加氢效果的影响,得到了优化的工艺条件:反应压力14 MPa,反应温度390℃,氢油体积比1 600:1,液体体积空速0.25 h-1.加氢改质产品切割得到汽油、柴油和尾油馏分,分别占产物质量的9.82%,73.12%和16.43%.汽柴油馏分经过简单处理后可以得到合格的产品,加氢尾油可以作为优质的催化裂化或加氢裂化原料. 相似文献
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在100mL固定床加氢实验装置上,采用自制的不同性质的加氢催化剂组合对云南解放军化肥厂鲁奇炉副产的宽馏分煤焦油进行了加氢改质的工艺研究.结果表明,反应压力、温度、空速和氢油比等参数对煤焦油加氢改质的影响显著,并在反应压力12.0MPa,温度360℃,液时空速1.0h-1和氢油比1200∶1的优化条件下通过加氢改质和产品分馏,可以获得约9%的小于160℃石脑油馏分、78%的160℃~350℃柴油馏分和13%大于350℃尾油馏分.实验装置连续运行了1114h后仍能保持稳定,催化剂表现出良好的活性和稳定性. 相似文献
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采用加氢预精制催化剂、加氢精制催化剂、加氢裂化催化剂以及加氢饱和催化剂适宜的级配方式对高温煤焦油馏分油进行二段加氢改质,结果表明,高温煤焦油馏分油的性质经加氢改质后得到大幅度改善,密度由1 169.7kg/m3降低到900.9kg/m3以下,氢碳原子比由0.79提高到1.63以上,残炭降低到0.02%(质量分数);其石脑油馏分的硫、氮含量分别小于5μg/g和1μg/g,芳烃潜含量大于68%(质量分数),是催化重整的优质原料;其柴油馏分的硫含量很低,凝点和冷滤点均小于-30℃,十六烷值大于39,是国Ⅳ低凝柴油的优质调和组分;而加氢尾油基本由芳烃组成,不宜作为催化裂化的原料. 相似文献
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介绍了采用石油化工科学研究院开发的分区进料灵活加氢改质MHUG-Ⅱ技术将原200万吨/年柴油加氢精制装置改造为248万吨/年催直柴灵活加氢改质装置。改造后可以同时加工密度高、十六烷值低的催化柴油和硫含量高、十六烷值较高的直馏柴油,生产满足国Ⅳ以上标准清洁柴油。 相似文献
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Lawrence C. Baldwin Matthew C. Davis Alicia M. Hughes David V. Lupton 《Journal of the American Oil Chemists' Society》2019,96(5):571-583
Domestically produced biofuels may help to reduce dependence on imported oil for powering transportation and infrastructure in the future. In this report, we reacted medium-chain and long-chain fatty anhydrides (capric, caprylic, lauric, and palmitic) with furfuraldehyde by the Perkin condensation to produce 2-n-alkenylfurans. In the second step, the 2-n-alkenylfurans were hydrogenated to form 2-n-alkyltetrahydrofurans. Basic fuel property testing (melting point, density, kinematic viscosity, derived cetane number, and calorific value) of the 2-n-alkyltetrahydrofurans indicates they are potentially useful as fuels for diesel engines. The mixture composed of 2-octyl- and 2-decyltetrahydrofuran had the best combination of fuel properties including a low melting point (−39 °C), high cetane number (63.1), high flash point (98.2 °C), and low viscosity (2.26 mm2 s−1, 40 °C), which compares favorably with specifications for diesel #2 and biodiesel. 相似文献
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生产清洁燃料是目前世界炼油工业的发展趋势。本文介绍了国内外柴油生产的现状及质量发展趋势,探讨了目前国内外生产新标准柴油的相关技术及发展,并以此为依据,找出目前国内柴油与发达国家的差距。 相似文献
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Methanol-to-diesel (MTD) means a synthetic diesel fuel, its raw material is methanol. And it is a liquid alcohol ether mixture with appropriate amount of additives, which can be blended with diesel fuel at various levels. It was synthesized by methanol with 1,2-epoxypropane and epoxyethane using modified calcined Mg/Al hydroxides as catalysts. The test and study on the physical properties of MTD and the fuel consumption and emissions of diesel engine using the mixed MTD and diesel fuel have been performed. The results indicates that there was no significant difference in the power values of diesel and the blend fuels while fuel consumption increasing around 14%, and of much lower emissions of exhaust. When using the diesel fuel mixed with 20-30% of MTD. The conclusion is that MTD is a cheap and clean low power loss additive fuel for diesel engines. 相似文献
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The use of biodiesel as a substitute for petroleum-based diesel has become of great interest for the reasons of combating the destruction of the environment, the price of petroleum-based diesel and dependency on foreign energy sources. But for practical feasibility of biodiesel, antioxidants are added to increase the oxidation stability during long term storage. It is quite possible that these additives may affect the clean burning characteristics of biodiesel. This study investigated the experimental effects of antioxidants on the oxidation stability, engine performance, exhaust emissions and combustion characteristics of a four cylinder turbocharged direct injection (TDI) diesel engine fuelled with biodiesel from croton megalocarpus oil. The three synthetic antioxidants evaluated its effectiveness on oxidation stability of croton oil methyl ester (COME) were 1, 2, 3 tri-hydroxy benzene (Pyrogallol, PY), 3, 4, 5-tri hydroxy benzoic acid (Propyl Gallate, PG) and 2-tert butyl-4-methoxy phenol (Butylated Hydroxyanisole, BHA). The fuel sample tested in TDI diesel engine include pure croton biodiesel (B100), croton biodiesel dosed with 1000 ppm of an effective antioxidant (B100 + PY1000), B20 (20% croton biodiesel and 80% mineral diesel) and diesel fuel which was used as base fuel. The result showed that the effectiveness of the antioxidants was in the order of PY > PG > BHA. The brake specific fuel consumption (BSFC) of biodiesel fuel with antioxidants decreased more than that of biodiesel fuel without antioxidants, but both were higher than that of diesel. Antioxidants had few effects on the exhaust emissions of a diesel engine running on biodiesel. Combustion characteristics in diesel engine were not influenced by the addition of antioxidants in biodiesel fuel. This study recommends PY and PG to be used for safeguarding biodiesel fuel from the effects of autoxidation during storage. Overall, the biodiesel derived from croton megalocarpus oil can be utilized as partial substitute for mineral diesel. 相似文献
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对青海原油进行了综合评价。结果表明,该原油密度小(849.9 kg/m3),硫含量0.51%,蜡含量4.98%,属于轻质含硫含蜡原油。重整原料和汽油馏分烷烃含量较高,适宜做乙烯裂解料,煤、柴油馏分变色严重,硫、氮含量高,均需加强加氢精制效果。减压蜡油Cp高(70.63%),CA低(18.01%),残炭值低(0.0256%),重金属含量较小,既适合生产高黏度指数润滑油,又是催化裂解的优良原料。渣油的硫含量较高(6 200 mg/kg),沥青质含量高(6.2%),重金属铁(45.73μg/g)、镍(35.29μg/g)、钙(73.86μg/g)含量较高,作催化裂化原料时,应注意其掺炼。 相似文献
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连续式FCC柴油萃取-光催化氧化深度脱硫 总被引:3,自引:1,他引:2
尽快降低燃料油中的硫含量是整个炼油业都无法回避的重大问题,炼油工业发达的国家已提出生产超低硫清洁燃料 (硫含量低于10 μg8226;g-1)的目标。本文通过连续式FCC柴油萃取-光催化深度脱硫工艺,对FCC柴油进行精制,精制油中硫含量采用硫氮荧光分析仪测定,硫含量为45 μg8226;g-1。实验结果表明:萃取操作的适宜条件为常压,萃取温度40℃,剂油比1.5∶1;反应操作的适宜条件为反应温度40℃,反应时间1 h,氧化剂用量为4%。在以上操作条件下,精制油中的硫含量为达到欧Ⅳ标准,精制油总收率超过96%。 相似文献
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Performance, emission and combustion characteristics of poon oil and its diesel blends in a DI diesel engine 总被引:1,自引:0,他引:1
Experimental tests have been carried out to evaluate the performance, emission and combustion characteristics of a diesel engine using Neat poon oil and its blends of 20%, 40%, and 60%, and standard diesel fuel separately. The common problems posed when using vegetable oil in a compression ignition engine are poor atomization; carbon deposits, ring sticking, etc. This is because of the high viscosity and low volatility of vegetable oil. When blended with diesel, poon oil presented lower viscosity, improved volatility, better combustion and less carbon deposit. It was found that there was a reduction in NOx emission for Neat poon oil and its diesel blends along with a marginal increase in HC and CO emissions. Brake thermal efficiency was slightly lower for Neat poon oil and its diesel blends. From the combustion analysis, it was found that poon oil-diesel blends performed better than Neat poon oil. 相似文献