The Effects of MTBE/Ethanol Additives on Toxic Species Concentration in Gasoline Flame
The Effects of MTBE/Ethanol Additives on Toxic Species Concentration in Gasoline Flame
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MTBE/乙醇添加剂对汽油火焰中有毒物质浓度的影响
DOI：
10.1021/ef900035q
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发表时间：
2009-06
期刊：
影响因子：
5.3
通讯作者：
Li, Yuyang
中科院分区：
文献类型：
--
作者：
Raine, Robert Roy;Yang, Xianglan;Cheng, Chuanhui;Yao, Chunde;Tian, Zhenyu;Li, Yuyang
甲基叔丁基醚（MTBE）和乙醇作为汽油燃料添加剂可以提高汽油燃料辛烷值。采用同步辐射技术，研究了10%体积的含氧添加剂（MTBE和乙醇）对低压层流预混汽油火焰中主要燃烧中间体的影响。给出了三种火焰的光离质谱，并用热电偶测量了火焰的温度。比较了汽油、汽油乙醇和MTBE/汽油火焰中5种典型燃烧有毒物质的相对浓度。结果表明，乙醇和MTBE均能延缓汽油中芳烃的氧化，且MTBE的作用比乙醇更明显。研究还表明，乙醇的加入导致乙醛浓度的增加，而MTBE的加入对乙醛浓度没有显著影响。所得结果为火焰中中间体和自由基的分析提供了数据。
Methyl tert-butyl ether (MTBE) and ethanol as gasoline fuel additives can enhance gasoline fuel octane value. This study evaluates the effects of these oxygenated additives (MTBE and ethanol) at 10% by volume on the main combustion intermediates in a low-pressure laminar premixed gasoline flame using synchrotron radiation. The photoionization mass spectra of three flames were presented, and the temperatures of flames were measured by a thermocouple. The relative concentrations of five typical combustion toxic species in the gasoline, gasohol, and MTBE/gasoline flame were compared. It is observed that ethanol and MTBE both delay the oxidation of aromatics in gasoline, and MTBE plays a more obvious role than ethanol. It is also shown that the addition of ethanol leads to an increased concentration of acetaldehyde, whereas the addition of MTBE has no significant effect on the concentration of acetaldehyde. The results obtained provide data for the analysis of intermediates and radicals in flames, which is of...