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Effect of mono-olefins and diolefins on the stability of automotive gasoline

机译:单烯烃和二烯烃对汽车汽油稳定性的影响

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摘要

Gasoline is a volatile, inflammable liquid composed of a mixture of paraffinic, naphthenic, olefinic, and aromatic hydrocarbons (C_4-C_(12)). During storage, these components react with atmosphere oxygen and with each other, promoting changes in their physical-chemical characteristics due to the formation of gums. These materials have polymeric character and normally cause unwanted effects such as deposition in car filters and distribution lines. A discussion of olefin types, their contents, and the oxidation reaction mechanisms in Brazilian gasolines is presented in this work. Doped gasolines subjected to oxidation were analyzed for density, induction period, and gum content. The results show that not all olefins contribute positively to gum formation. Among the olefins studied, those which form secondary allylic radicals (cyclohexene and 2,4-hexadiene) are the ones which most contribute to the formation of gum.
机译:汽油是挥发性,易燃液体,由链烷烃,环烷烃,烯烃和芳烃(C_4-C_(12))组成。在储存过程中,这些成分会与大气中的氧气发生反应,并彼此之间发生反应,从而由于树胶的形成而促进其物理化学特性的变化。这些材料具有聚合特性,通常会产生不良影响,例如在汽车滤清器和分配管线中沉积。本文讨论了巴西汽油中烯烃的类型,含量及其氧化反应机理。分析了经过氧化的掺杂汽油的密度,诱导期和口香糖含量。结果表明,并非所有的烯烃都对树胶的形成有积极作用。在所研究的烯烃中,那些形成仲烯丙基的基团(环己烯和2,4-己二烯)是最有助于形成胶的烯烃。

著录项

  • 来源
    《Fuel》 |2006年第13期|p.1860-1865|共6页
  • 作者单位

    Fuel Laboratory, Chemistry Department, ICEx, Universidade Federal de Minas Gerais, Av. Antonio Carlos no: 6627, Belo Horizonte, Minas Gerais CEP: 31.270-901, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 燃料化学工业(总论);
  • 关键词

    Gum; Gasoline; Olefins;

    机译:口香糖;汽油;烯烃;

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