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辛烷值是表示点燃式发动机燃料抗爆性的一个约定数值,判定辛烷值的目的是判断汽油抗爆性能的优劣。本文研究了汽油辛烷值机的原理与构造及影响辛烷值测定准确性的因素,通过调整试验机参数、提高分析的重复性和再现性等有效措施,提高辛烷值测定的准确性,降低汽油生产成本。 相似文献
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汽油辛烷值发动机引法法测定法是目前唯一可靠的辛烷值测定法。本文对马达法和研究法合二为一的汽油辛烷值机的安装、调试、样品测定方法进行了详细的描述、探讨和改进,提高发动机引擎法测定汽油辛烷值的可靠性、准确性和精密性,为炼油工业提供准确的数据。 相似文献
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采用ASTM—CFR试验机测定车用汽油辛烷值,对标准燃料配制体积、最大爆震强度、进气温度、湿度、积炭等影响测定结果准确性的主要因素进行分析,并制定了相应的对策。 相似文献
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针对FCC汽油降烯烃后辛烷值低影响企业高辛烷值汽油调和的问题,室内评价了不同FCC汽油馏分对WK-602型辛烷值改进剂的感受性及与其它调和组分的相互作用。结果表明WK-602可有效提高汽油辛烷值,基础汽油的辛烷值愈低作用效果愈明显,添加量每增加0.5%,RON值可提高0.7~1个单位,与其它高辛烷值组分/添加剂的互溶性好,无消极作用;工业放大应用显示WK-602与高辛烷值组分/添加剂混合分散均匀,调和生产的97#车用汽油指标满足质量标准要求。应用WK-602辛烷值改进剂调和生产93#、97#汽油产品的经济效益良好。 相似文献
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在国家大力发展经济,能源需求日渐增高的前提下,市场对车用汽油的检测需求大大提高,其中研究法辛烷值与马达法辛烷值更为油品检测行业当中较为重要的检测项目,为此,联合法辛烷值试验发动机在油品检测领域中的地位尤为重要。 相似文献
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随着汽车工业的发展及环保意识的增强,各国都对汽油辛烷值提出了更高的要求。文章介绍了高辛烷值汽油调合组分的国内外发展情况。 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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通过深入学习CFR辛烷值机的操作规程、检测方法和操作经验积累,将长期在操作中遇到的故障、产生故障的原因、处理方法及日常维护进行了归纳和总结,希望从事辛烷值检测的人员有所启迪和收获.从而来延长设备的寿命、确保设备安全可靠性、辛烷值准确无误性. 相似文献
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The effects of the fuel concentration gradient and the octane number on the autoignition and knocking phenomena in a stratified
mixture were studied experimentally on a using a rapid compression machine using stratified mixtures of air and fuels n-heptane, iso-octane, n-hexane, and n-pentane with different octane numbers (0, 100, 25, and 62, respectively). In the chamber, the lower the vertical location,
the richer the fuel concentration of the mixture. The mixture contains no gradient in the horizontal direction. The experimental
results show that rapid spread of the flame is caused not by flame propagation but by sequential autoignition. Although ignition
delays of a stratified mixture are not dependent on the fuel concentration gradient in the mixture, they are constant as long
as mean equivalence ratio is the same, and they decrease with the decreasing mean equivalence ratio. In excess of certain
gradient value, the knock intensity is smaller as the gradient becomes larger for all fuels tested regardless of their octane
number.
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Translated from Fizika Goreniya i Vzryva, Vol. 45, No. 4, pp. 93–100, July–August, 2009. 相似文献
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The concept of fuel stratification has been proposed and applied to a four-valve port injection spark ignition engine. In this engine, two different fuels or fuel components are admitted through two separate inlet ports and stratified into two regions laterally by strong tumble flows. Each stratified region has a spark plug to control the ignition. This engine can operate in the stratified lean-burn mode at part loads when fuel is supplied only to one of the inlet ports. While at high load operation, an improved fuel economy and higher power output are also expected through increased anti-knock features by taking advantage of the superior characteristics of different fuel or fuel components. This is achieved by igniting the lower RON (research octane number) fuel first and leaving the higher RON fuel in the end gas region. In this paper, knock limits of homogenous and different fuel stratification combustion modes at high loads were investigated experimentally. Primary reference fuels (PRF), iso-octane and n-heptane, were used to simulate three fuels of different RON: RON90, RON95 and RON100. The research results show that with stratified fuel components of low and high octane numbers, the knock limit, as defined by the minimum spark advance for knocking combustion, was extended apparently when the lower RON fuel was ignited first. In addition, the knock limit could also be extended by increasing the amount of higher RON fuel. However, igniting first the lower RON fuel in the fuel stratification combustion mode produced little improvement in anti-knock behaviour over the homogeneous combustion of the mixture of those two stratified fuels with an average RON. 相似文献
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介绍中国石油石油化工研究院开发的LDR-100HRB催化剂在中国石油哈尔滨石化分公司600 kt·a~(-1)的MIP-CGP催化装置应用情况。在原料油性质变差条件下,LDR-100HRB催化剂表现出重油转化能力强、焦炭选择性好和汽油辛烷值高的特点。两次标定结果表明,干气产率降低0.38个百分点,油浆产率降低0.67个百分点,焦炭产率降低0.58个百分点,总液收增加1.63个百分点,汽油马达法辛烷值和研究法辛烷值分别增加1.5个单位和1.3个单位。 相似文献
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在80毫升催化剂容量的恒温反应装置中进行了我国四种主要原油轻馏份(玉门、克拉玛依、川中直馏汽油60—130℃馏份及抚顺页岩焦油加氢油60—120℃馏份)铂重整制取芳香烃及玉门和克拉玛依直馏汽油80—180℃馏份提高辛烷值的试验。在制取芳香烃方面,获得了合理操作条件、物料平衡、产品分布等数据,四种原油轻馏份的铂重整生成油中芳香烃产率各为38.5%(重,玉门)、31.8%(重,克拉玛依)、46.6%(重,川中)和32.2%(重,抚顺),氢气产率为1.7—2.2%(重),液收率为90—94%(重)。在50毫升催化剂容量的活性装置中进行了2170小时寿命试验,芳香烃产率自38.8%下降至35.4%(体积);在提高汽油辛烷值方面,初步地研究了几种变数(温度、压力、空速)对产品液收率和辛烷值的影响,获得了合理操作条件,反应产品的液收率为90%(重)左右,脱丁烷产品的辛烷值可自原料油的44左右提高至72以上。(马达法,未加铅)。 相似文献