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汽车尾气造成的大气污染问题已引起人们的密切关注,降低汽油硫含量是改善空气质量的有效手段,采用有效的技术手段降低催化裂化(FCC)汽油硫含量已成为当务之急。本文介绍了催化裂化原料加氢预处理、催化裂化过程直接脱硫和催化裂化汽油精制脱硫三种FCC汽油脱硫技术。 相似文献
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催化裂化汽油(FCC)具有高硫含量的特点,因此降低FCC汽油中的硫含量是非常重要。而催化裂化汽油(FCC)脱硫技术分为加氢脱硫和非加氢脱硫,本文主要介绍这两类脱硫技术的机理,并对国内外汽油脱硫技术的进展加以综述。 相似文献
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近年来,各国环境保护法规对汽油硫含量的限制越来越严格。介绍了国内外FCC汽油脱硫技术的发展概况,详细阐述了各种脱硫技术的工艺流程,总结了其优点和不足,提出了生产清洁汽油的一种解决方案。 相似文献
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汽油中硫化物的存在加重了汽车尾气中污染物的排放,对环境的影响很大。而且会缩短汽油诱导期,对发动机的影响也很大。因此,降低汽油中的硫含量势在必行。本文旨在开发一种用于流化催化裂化过程的添加剂,以降低催化裂化汽油中的硫含量,为生产清洁汽油做出贡献。 相似文献
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催化裂化汽油是我国车用汽油的主要调和来源,但是硫含量远高于车用汽油质量标准的要求值;因此如何高效降低硫含量是催化裂化汽油精制处理的关键。本文综述了国内外催化裂化汽油脱硫精制生产技术。从选择性加氢脱硫技术(Prime-G+技术、SCANfining技术、CD Tech技术、RSDS技术、OCT-M技术和DSO技术),选择性加氢脱硫耦合辛烷值恢复技术(RIDOS技术和GARDES技术)以及吸附脱硫技术(S-Zorb技术)三方面来阐述国内外催化裂化汽油清洁化技术的原理、特点及其应用。指出深度脱硫和辛烷值保持、烯烃饱和率之间的矛盾,后续研究者仍需在工艺流程改进、工艺条件优化以及新型催化剂开发等方面做出巨大努力。 相似文献
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催化裂化汽油溶剂萃取脱硫的研究 总被引:5,自引:0,他引:5
采用二甘醇、三甘醇、聚乙二醇-200和聚乙二醇-400四种萃取溶剂,对重油催化裂化精制汽油进行了萃取脱硫试验,结果表明,三甘醇最合适,二级萃取脱硫率达到37.5%,汽油收率为86%,萃取后汽油芳烃和烯烃含量减少,辛烷值下降1.2单位(RON)。三甘醇对汽油中的主要硫化物噻吩类有较好的选择溶解性。 相似文献
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This study evaluates the influence of gasoline hydrocarbon components on thiophene conversion over H-ZSM5 zeolite. Experiments are carried out in a CREC fluidized riser simulator under mild conditions using thiophene/hydrocarbon mixtures as representatives of gasoline. Results show a high and selective thiophene conversion, forming H2S, aromatics, alkyl-thiophenes, benzothiophene, and coke. It is also found that gasoline octane number is enhanced and olefin content reduced. This is accomplished with minimum gasoline losses. On the basis of the data reported it is hypothesized that thiophene conversion takes place via ring opening and alkylation, with gasoline hydrocarbon components having key roles as hydrogen donors in thiophene ring opening reactions as well as co-reactants in thiophene alkylation. These observations are in good agreement with previous thermodynamic and kinetic analysis developed using sulfur containing compounds by the CREC-UWO research group [4] and [10]. 相似文献
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催化裂化汽油脱硫技术的研究发展状况 总被引:5,自引:0,他引:5
介绍了国内外汽油的质量标准,综合叙述了我国催化裂化汽油脱硫技术的现状。建议选择适当的组合工艺,如分离技术与加氢技术的组合,膜分离脱硫技术与氧化脱硫技术的组合,萃取脱硫技术与加氢脱硫技术的组合以及加氢脱硫技术与氧化脱硫技术的组合等,更加环保、高效、经济地实现石油脱硫。 相似文献
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In order to further reduce the sulfur content in gasoline, a new desulfurization process for gasoline was obtained by means of electrochemically catalytic oxidation and extraction with an electrochemical fluidized-bed reactor. The particle group anode was activated carbon-supported lead dioxide (β-PbO2/C). The electrolyte was aqueous NaOH solution, and copper pillar was cathode in the electrochemical reactions. The β-PbO2/C particle group anodes can remarkably accelerate the electrochemical reaction rate and promote the electrochemical catalysis performance for the electrochemical desulfurization reaction. Also, gasoline desulfurization rule was investigated in an alkali solution. The experimental results indicated that the optimal desulfurization conditions were as follows: the cell voltage, the pH value of the electrolyte, feed volume flow rate and the β-PbO2 percentage by weight were 3.2 V, pH value 13.1, 300 ml min− 1 and 5.0 wt.%, respectively. Under these conditions the concentration of sulfur in gasoline was reduced from 310 to 40 μg g− 1, and the main properties of the product were not significantly affected. Based on these experimental results, a mechanism of indirect electrochemical oxidation was proposed. 相似文献
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以氧气作氧化剂,甲酸作催化剂,N-甲基吡咯烷酮(NMP)作萃取剂,采用催化氧化反应与溶剂萃取相结合的方法对催化裂化柴油进行了氧化萃取脱硫实验。通过单因素实验考察了催化剂用量、催化氧化温度、时间、氧气压力及萃取剂的用量等对催化裂化柴油硫质量分数的影响。通过实验得出最适宜的脱硫条件为:反应温度80℃,反应时间90 min,充氧压力0.6 MPa,V(催化剂)∶V(柴油)=10%。经催化氧化,柴油硫质量分数可从1 694.2μg/g降到190.8μg/g,脱硫率达到88.7%;在V(萃取剂)∶V(柴油)=1.0和室温条件下,用NMP萃取3次,柴油硫质量分数为37.5μg/g,小于50μg/g,达到欧Ⅳ排放标准的要求。 相似文献