共查询到19条相似文献,搜索用时 843 毫秒
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在分析催化裂化汽油馏分单体烃辛烷值特点的基础上,确定了理想的汽油高辛烷值组分,并系统考察了反应深度对大庆蜡油催化裂化反应所得汽油辛烷值和高辛烷值组分含量影响的差异,同时研究了汽油烯烃催化转化生成高辛烷值组分的可行性。结果表明,不同重油催化裂化反应深度下,汽油的烃组成和辛烷值的差异较大,不同烃族对辛烷值的贡献不同。适宜反应条件下,富含C_5~C_7烯烃的汽油和大分子烯烃均可转化为高辛烷值组分。 相似文献
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研究了MIP(Maximizing Iso-Paraffins,最大化多产异构烷烃FCC工艺)汽油与FCC汽油的性质特点,比较了抚顺石油化工研究院开发的OCT-M催化汽油选择性加氢脱硫技术将MIP汽油与FCC汽油硫含量降低到≯50 μg/g情况下(欧IV标准)其辛烷值损失情况.工业应用标定结果表明,OCT-M技术将MIP汽油硫含量由417~710 μg/g降低到24~28 μg/g,RON损失1.6~1.8个单位,表明OCT-M技术可为我国炼厂生产欧IV标准清洁汽油提供经济、灵活的技术方案. 相似文献
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CO_2加氢直接合成汽油不仅有利于CO_2减排,还可减轻人们对化石能源的依赖。汽油馏分烃产物组成是决定汽油燃料品质的重要因素,其调控是该过程具有挑战性的研究热点。研究NaFe_3O_4/ZSM-5催化剂中分子筛的金属(La,Ga,Zn,Cu,Co)改性对CO_2加氢产物中汽油馏分烃组成的影响,结果表明,与其他金属相比,Cu改性ZSM-5分子筛组分可在保持较高汽油收率前提下,明显提高汽油产物中异构烷烃选择性。优化改性分子筛中Cu质量分数8%时,汽油馏分烃产物中异构烷烃含量最高。当Na-Fe_3O_4和Cu-ZSM-5采用分层填装方式时,汽油馏分烃产物中异构烷烃含量达50.5%,组成调控后富含异构烷烃汽油产品更符合汽油品质升级趋势需求。 相似文献
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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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流化催化裂化汽油改质和增产低碳烯烃的研究 总被引:4,自引:0,他引:4
采用GL型催化剂,在小型固定流化床实验装置上考察了反应温度、剂油比、空速和水油比等操作条件对流化催化裂化(FCC)汽油催化改质汽油的产品分布、低碳烯烃(丁烯、丙烯和乙烯)产率和族组成的影响。实验结果表明,在一定反应条件下,FCC汽油通过催化改质可以降低烯烃含量,提高芳烃含量和辛烷值,在满足新汽油标准的同时提高了低碳烯烃的产率。此外,较高的反应温度、剂油比和水油比以及较低的空速有利于FCC汽油催化改质和增产低碳烯烃。 相似文献
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FCC汽油选择加氢脱除二烯烃技术进展 总被引:1,自引:0,他引:1
FCC汽油中含有微量的二烯烃,对其利用带来很大危害。本文介绍了去除二烯烃的方法、选择加氢的反应机理和国内外研究进展,采用选择加氢的方法脱除二烯烃是目前最经济实用的方法。 相似文献
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介绍了劣质催化裂化原料的特点,分析了催化裂化汽油清洁化对策,应从提高FCC汽油质量关键应从FCC进料预处理、优化FCC加工过程以及FCC汽油精制等3方面出发.采用有效的降烯烃技术以及选择性加氢和氧化一萃取等脱硫技术对催化裂化汽油进行清洁化处理。认为应注重发展加氢技术,增强加氢在清洁油品生产中的作用;适当减少FCC汽油所占比例,增加异构化油、烷基化油、重整汽油比例,缩小与国外成品油结构组成的差距。 相似文献
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FCC gasoline obtained from an Indian refinery was analyzed for its quality improvement through catalytic processes. The analysis indicated the presence of high amount of sulfur, olefin and iso-paraffins in the feed that are not suitable for processing through the hydro treatment or hydro-isomerization. Detailed studies indicated that majority of iso-paraffinic and olefinic compounds in the feed boil below 60 °C. The entire range of gasoline is fractionated into light fraction (IBP-60 °C) and heavy fraction (60 °C-FBP). Heavy hydrocarbon fraction exhibited more aromatics and sulfur with comparatively low olefins and iso-paraffins. HDS followed by hydro-isomerization of the heavier fraction resulted in the formation of C6-C9 iso-paraffins through the saturation of olefins and aromatics. Overall, the processed FCC gasoline exhibited more iso-paraffins with low olefins, low aromatics and sulfur, without any loss in octane number. 相似文献
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采用气相色谱-氮化学发光检测器(GC-NCD)方法测定了汽油调合组分和成品车用汽油中各种含氮化合物的分布和组成,对比分析了汽油中苯胺类化合物的来源。结果表明,正规车用汽油中的含氮物质均来自催化汽油组分,由原料性质、生产工艺等因素自然形成的,而且总氮含量较低,氮形态分布主要以苯胺、甲基苯胺等为主。与苯胺类物质作为汽油添加剂的加入量比较,提出了其判别检测限值的建议,为控制检测汽油质量提供依据。 相似文献
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The scope of the present study was to elucidate the effect of heavy sulfur compounds, commonly found in the gas oils, on the percentage of sulfur in gasoline range during the Fluid Catalytic Cracking (FCC) process. Five model sulfur compounds commonly found in the gas oils were studied: benzothiophene, 2-methyl-benzothiophene, 3-decyl-thiophene, dibenzothiophene and 4,6-dimethyl-dibenzothiophene. In order to maintain a realistic hydrocarbon environment each one of the heavy sulfur model compounds were diluted in conventional gas oil. Their cracking behaviour were studied using a steamed deactivated FCC catalyst, while the run tests were performed in an automated Short Contact Time Microactivity Test Unit (SCT-MAT) operated at 560 °C and 12 s run time. The experimental results indicated that the long chain alkyl-thiophene (3-decyl-thiophene) is mainly responsible for the increase of sulfur amount in the gasoline range during cracking, through dealkylation and side cracking reactions for the production of thiophene and shorter chain alkyl-thiophenes, respectively. That sulfur compound was also the most reactive one with respect to desulfurization, since it was highly cracked to H2S and decomposed to S in coke. On contrary, the polycyclic sulfur compounds did not affect the sulfur amount in gasoline, while their reactions were strongly related to their chemical structure. Thus, the main reaction pathway of the alkylated 2-methyl-benzothiophene and 4,6-dibenzothiophene during the FCC process was isomerization, while for benzothiophene and dibenzothiophene alkylation reactions were dominated. 相似文献