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高压脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx

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董冰岩, 李琼, 甘青青, 赵旭武. 高压脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx[J]. 环境化学, 2019, 38(4): 894-902. doi: 10.7524/j.issn.0254-6108.2018061201
引用本文: 董冰岩, 李琼, 甘青青, 赵旭武. 高压脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx[J]. 环境化学, 2019, 38(4): 894-902. doi: 10.7524/j.issn.0254-6108.2018061201
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DONG Bingyan, LI Qiong, GAN Qingqing, ZHAO Xuwu. Removal of NOxby high voltage pulse discharge combined with LaMn1-xFexO3 perovskite catalysts[J]. Environmental Chemistry, 2019, 38(4): 894-902. doi: 10.7524/j.issn.0254-6108.2018061201
Citation: DONG Bingyan, LI Qiong, GAN Qingqing, ZHAO Xuwu. Removal of NOxby high voltage pulse discharge combined with LaMn1-xFexO3 perovskite catalysts[J]. Environmental Chemistry, 2019, 38(4): 894-902. doi: 10.7524/j.issn.0254-6108.2018061201
shu

高压脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx

  • 1.

    江西理工大学资源与环境工程学院, 赣州, 341000;

  • 2.

    江西省矿冶环境污染控制重点实验室, 赣州, 341000

  • 基金项目:

    国家自然科学基金（51567010）资助.

Removal of NOxby high voltage pulse discharge combined with LaMn1-xFexO3 perovskite catalysts

  • 1.

    College of resources and environmental engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China;

  • 2.

    Key laboratory of pollution control of mining and metallurgy of Jiangxi Province, Ganzhou, 341000, China

  • Fund Project: Supported by National Natural Science Foundation of China (51567010).

  • 摘要: 高压脉冲放电协同催化剂技术是目前最具有前景的去除NOx的方法之一，本文以氮氧化物为处理对象，通过脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx.采用柠檬酸-EDTA溶胶凝胶法制备LaMnO3钙钛矿催化剂，对该催化剂掺杂Fe元素，改变催化剂制备时的焙烧温度，探究催化剂协同脉冲放电在不同反应温度、催化剂投加量等因素下对NO转化、NO2生成和NOx的去除效果的影响，从而达到提高氮氧化物的去除率、降低能耗等目的.同时结合XRD、SEM、BET等表征手段对催化剂进行表征.结果表明，在催化剂LaMn1-xFexO3中，随着Fe掺杂比的增加，NO转化率出现先增大后逐渐减小的趋势；随着催化剂的焙烧温度增加，NO转化率出现逐渐减小的趋势；随着催化剂投加量的增加，NOx去除率不断增大后趋于稳定.在放电频率为30 Hz、脉冲电压为30 kV、Fe的掺杂比为0.3、焙烧温度为700℃、投加量为1.6 g、反应温度为300℃的条件下，NOx的去除率为62.15%.
    Abstract: High-voltage pulsed discharge synergistic catalyst technology is one of the most promising NOxremoval methods at present. The object of treatment in this paper was NOx, which was removed by a pulsed discharge in conjunction with a perovskite-type catalyst. A citric acid-EDTA Sol-Gel method was employed to prepare LaMnO3 perovskite catalyst. By mixing Fe with the catalyst and by changing the calcination temperatures in the process of catalyst preparation, the effects of the catalyst-co-pulsed discharge on NO conversion, NO2 generation, and NOx removal efficiency under different sets of conditions such as reaction temperatures, catalyst doping amount were analyzed. XRD and SEM were used to characterize the catalysts. The results showed that with increasing amount of Fe added in the catalyst LaMn1-xFexO3, the NO conversion first increased and then gradually went down. With the increase of calcination temperature, the NO conversion rate gradually decreased. With increasing dosage of the catalyst, the NOx removal rate increased and then stabilized. When setting discharge frequency to be 30 Hz, pulse voltage 30 kV, Fe doping amount 0.3, calcination temperature 700℃, dosage of catalyst 1.6 g, and reaction temperature 300℃, the highest NOx removal rate of 62.15% was reached.
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  • 收稿日期:  2018-06-12
  • 刊出日期:  2019-04-15

高压脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx

  • 1.  江西理工大学资源与环境工程学院, 赣州, 341000;
  • 2.  江西省矿冶环境污染控制重点实验室, 赣州, 341000
  • 收稿日期:  2018-06-12
基金项目:

国家自然科学基金（51567010）资助.

摘要: 高压脉冲放电协同催化剂技术是目前最具有前景的去除NOx的方法之一，本文以氮氧化物为处理对象，通过脉冲放电协同LaMn1-xFexO3钙钛矿型催化剂去除NOx.采用柠檬酸-EDTA溶胶凝胶法制备LaMnO3钙钛矿催化剂，对该催化剂掺杂Fe元素，改变催化剂制备时的焙烧温度，探究催化剂协同脉冲放电在不同反应温度、催化剂投加量等因素下对NO转化、NO2生成和NOx的去除效果的影响，从而达到提高氮氧化物的去除率、降低能耗等目的.同时结合XRD、SEM、BET等表征手段对催化剂进行表征.结果表明，在催化剂LaMn1-xFexO3中，随着Fe掺杂比的增加，NO转化率出现先增大后逐渐减小的趋势；随着催化剂的焙烧温度增加，NO转化率出现逐渐减小的趋势；随着催化剂投加量的增加，NOx去除率不断增大后趋于稳定.在放电频率为30 Hz、脉冲电压为30 kV、Fe的掺杂比为0.3、焙烧温度为700℃、投加量为1.6 g、反应温度为300℃的条件下，NOx的去除率为62.15%.

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