车用汽油辛烷值下降的原因分析

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	英文篇名：Cause Analysis on Octane Number Decrease of Vehicle Gasoline 作者：王翔翀 英文作者：Wang Xiangchong; 关键词：车用汽油 ; 辛烷值 ; 下降 ; 原因 ; 分析 ; 对策 英文关键词：vehicle gasoline;;octane number;;decrease;;cause;;analysis;;countermeasures 中文刊名：YKJY 英文刊名：Oil Depot and Gas Station 机构：北京石油产品质量监督检验中心; 出版日期：2019-04-20 出版单位：石油库与加油站 年：2019 期：v.28;No.162 语种：中文; 页：YKJY201902011 页数：4 CN：02 ISSN：11-3945/TE 分类号：6+38-40

摘要

依据BD11/238—2016标准,使用辛烷值机、密度测定仪、气相色谱仪、自动常压蒸馏仪等设备,分别对来自3家炼油厂的95号和92号车用汽油样品的辛烷值下降(不合格)原因进行了实验和分析,结果表明:造成车用汽油检测样品辛烷值下降的原因主要是由于样品中C_5及其以下组分含量过高(超过25%),在储运过程中和轻组分形成共沸物协同挥发;加氢脱硫后的催化车用汽油在阳光照射下易分解,使辛烷值下降。建议炼油厂在生产车用汽油时应控制C_5及其以下组分的含量和密度值。质检室所采汽油样品应避光保存。
        According to the relevant standards,using octane number machine, density analyzer, gas chromatograph and automatic atmospheric distillation equipment,the reasons causing unqualified octane number of #95 and #92 vehicle gasoline samples from three refineries were tested and analyzed. The results show that the unqualified octane number of gasoline samples is due to the high content of components below C5( C5-) in gasoline samples,which is easy to volatilize during storage and transportation,and result in azeotropic volatilization of MTBE and C5 hydrocatbon; the vehicle gasoline is liable to decompose in sun exposure and the samples are usually stored in colorless transparent glass bottles. It is suggested that refineries should control the content of C5-components and the density of vehicle gasoline,and the gasoline samples collected in the quality control room should be kept away from light.

引文

[1] 李长秀,王亚敏,田松柏.成品汽油组成及馏程与计算辛烷值的分布关系[J],石油学报(石油加工),2017,33(1):138-43.
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    [3] 郭飞鸿,王维民.汽柴油应用与质量管理[M],北京:中国石化出版社,2017.