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A new fast methodology to measure total diene content in gasoline

机译:一种测量汽油中总二烯含量的快速新方法

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摘要

The rate constants for the quenching of biacetyl phosphorescence by a series of conjugated dienes were measured. 1,3-cyclohexadiene (k~(qp) = 2.94×10~9s~(-1) mol~(-1) L), 2,5-dimethyl-2,4-hexadiene (k_(qp)=1.91× 10~9S~(-1) mol~(-1) L), 2,4-dimethyl-1,3-pentadiene (k_(qp)= 1.78×10~8 S~(-1) mol~(-1) L), 3-methyl-l,3-pentadiene (k_(qp) = 1.22×10~8 S~(-1) mol~(-1) L), 2,4-hexadiene (k~(qp) = 1.35×10~8 S~(-1) mol~(-1) L) and trans-2-methyl-l,3-pentadiene (k_(qp) = 3.84×10~8 S~(-1) mol~(-1)). Cyclooctene also quenched biacetyl phosphorescence but with a lower rate (k~(qp)= 1.97×10~7 S~(-1) mol~(-1) L). Quenching was not observed with 1-methylnaphthalene. Since conjugated dienes quench biacetyl phosphorescence preferentially, this method was studied using gasoline samples with known diene composition. A good correlation was found between the rate of quenching of biacetyl by the gasoline samples and the quantity of conjugated dienes present.
机译:测量了通过一系列共轭二烯淬灭联乙酰磷光的速率常数。 1,3-环己二烯(k〜(qp)= 2.94×10〜9s〜(-1)mol〜(-1)L),2,5-二甲基-2,4-己二烯(k_(qp)= 1.91× 10〜9S〜(-1)mol〜(-1)L),2,4-二甲基-1,3-戊二烯(k_(qp)= 1.78×10〜8 S〜(-1)mol〜(-1 )L),3-甲基-1,3-戊二烯(k_(qp)= 1.22×10〜8 S〜(-1)mol〜(-1)L),2,4-己二烯(k〜(qp) = 1.35×10〜8 S〜(-1)mol〜(-1)mol)和反式-2-甲基-1,3-戊二烯(k_(qp)= 3.84×10〜8 S〜(-1)mol 〜(-1))。环辛烯也淬灭了联乙酰磷光,但速率较低(k〜(qp)= 1.97×10〜7 S〜(-1)mol〜(-1)L)。 1-甲基萘未观察到淬灭。由于共轭二烯优先淬灭联乙酰磷光,因此使用已知二烯成分的汽油样品研究了该方法。在汽油样品中联乙酰的淬灭速度与存在的共轭二烯的数量之间发现了良好的相关性。

著录项

  • 来源
    《Fuel》 |2011年第4期|p.1696-1699|共4页
  • 作者单位

    Instituto de Quimica, Departamento de Quimica Organica, Universidade Federal do Rio de Janeiro, Una do Fundao, CT, Bloco A, Rio de Janeiro 21949-900, Brazil;

    Instituto de Quimica, Departamento de Quimica Organica, Universidade Federal do Rio de Janeiro, Una do Fundao, CT, Bloco A, Rio de Janeiro 21949-900, Brazil;

    Instituto de Quimica, Departamento de Quimica Organica, Universidade Federal do Rio de Janeiro, Una do Fundao, CT, Bloco A, Rio de Janeiro 21949-900, 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
  • 关键词

    gasoline; dienes; biacetyl; phosphorescence;

    机译:汽油;二烯联乙酰磷光;

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