| 流速和氧浓度对乙醇氧化生成醛排放的影响 |
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| 引用本文： | 刘方杰,刘圣华,魏衍举,徐斌,吴健,马志豪.流速和氧浓度对乙醇氧化生成醛排放的影响[J].农业机械学报,2014,45(8):27-32. |
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| 作者姓名： | 刘方杰 刘圣华 魏衍举 徐斌 吴健 马志豪 |
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| 作者单位： | 河南科技大学;西安交通大学;西安交通大学;河南科技大学;河南科技大学;河南科技大学 |
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| 基金项目： | 国家自然科学基金资助项目(50876088)、河南科技大学青年科学基金资助项目(2013QN002)和河南科技大学博士科研启动资金资助项目(09001719) |
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| 摘 要： | 利用发动机排气温度环境和气相色谱-氦离子化检测器(PDHID)快速检测方法,在醇类燃料流反应器中研究了流速和氧浓度对乙醇氧化生成乙醛、甲醛排放的影响。研究结果表明:温度为733~933 K时乙醇质量浓度随流速增加而增加,乙醇氧化需要有氧环境,富氧环境有利于乙醇氧化。温度低于833 K时延长乙醇氧化反应时间会导致乙醛、甲醛排放量增加,温度高于833 K时延长乙醇氧化反应时间有利于降低乙醛、甲醛排放量,温度高于933 K时流速对乙醛的生成和氧化影响较小。无氧环境下乙醛、甲醛的生成和氧化反应受到抑制,低于临界温度时富氧环境促进乙醛、甲醛生成,高于临界温度时富氧环境有利于乙醛氧化。
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| 关 键 词： | 乙醇 醛排放 流速 氧浓度 气相色谱仪 |
| 收稿时间： | 2013/8/10 0:00:00 |
Influence of Flow Velocity and Oxygen Concentration on Aldehyde Emissions from Ethanol Oxidation |
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| Liu Fangjie,Liu Shenghu,Wei Yanju,Xu Bin,Wu Jian and Ma Zhihao.Influence of Flow Velocity and Oxygen Concentration on Aldehyde Emissions from Ethanol Oxidation[J].Transactions of the Chinese Society of Agricultural Machinery,2014,45(8):27-32. |
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| Authors: | Liu Fangjie Liu Shenghu Wei Yanju Xu Bin Wu Jian and Ma Zhihao |
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| Abstract: | The influence of flow velocity and oxygen concentration on acetaldehyde and formaldehyde emissions from ethanol oxidation was investigated in a flow reactor under the temperature environment of engine exhaust pipe. Unregulated emissions were detected by a gas chromatography with a pulsed discharge helium ionization detector (PDHID). Experimental results showed that ethanol concentration increased with the increase of flow velocity at temperature range of 733~933K. Ethanol oxidation reaction was inhibited in anaerobic conditions, and oxygen-rich environment was conducive to ethanol oxidation. Acetaldehyde and formaldehyde emissions increased with prolonging the reaction time of ethanol oxidation when the temperature was lower than 833 K, while the opposite trend to acetaldehyde was observed when the temperature was above 833K, and the influence of flow velocity on acetaldehyde emission was not obvious when the temperature was higher than 933K. The generation and oxidation reactions of acetaldehyde were inhibited in anaerobic conditions. Below the critical temperature, the oxygen-rich environment was conducive to acetaldehyde and formaldehyde generation. Above the critical temperature, the oxygen-rich environment was conducive to acetaldehyde oxidation. |
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| Keywords: | Ethanol Aldehyde emissions Flow velocity Oxygen concentration Gas chromatography |
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