钠添加剂对介质阻挡-电晕放电耦合法尿素脱除NO的影响

doi:10.16085/j.issn.1000-6613.2017-1365

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1978-1984.DOI: 10.16085/j.issn.1000-6613.2017-1365

钠添加剂对介质阻挡-电晕放电耦合法尿素脱除NO的影响

李艳荣, 张香, 杨岚, 贺建勋, 闵小建, 樊英杰, 马晓迅

西北大学化工学院, 国家碳氢资源清洁利用国际科技合作基地, 陕北能源先进化工利用技术教育部工程研究中心, 陕西省洁净煤转化工程技术研究中心, 陕北能源化工产业发展协同创新中心, 陕西煤业化工技术研究院有限责任公司, 陕西西安 710069

收稿日期:2017-07-04 修回日期:2017-07-19 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 马晓迅,教授,研究方向为化石燃料和生物质资源的高度转化利用;烟气中SO₂、NO_x气体的排放控制,二氧化碳捕集与转化利用。
作者简介:李艳荣(1993-),女,硕士研究生。
基金资助:
国家自然科学基金（21536009）及陕西省科技计划（2017ZDCXL-GY-10-03）项目。

Effects of sodium additives on NO removal of urea by dielectric barrier-corona discharge coupling method

LI Yanrong, ZHANG Xiang, YANG Lan, HE Jianxun, MIN Xiaojian, FAN Yingjie, MA Xiaoxun

School of Chemical Engineering, Northwest University;International Scientific and Technological Cooperation Base for Clean Utilization of Hydrocarbon Resources;Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy;Shannxi Research Center of Engineering Technology for Clean Coal Conversion;Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi;Shaanxi Coal Chemical Technology Research Institute Co., Ltd., Xi'an 710069, Shaanxi, China

Received:2017-07-04 Revised:2017-07-19 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 利用自主设计的介质阻挡-电晕放电耦合装置进行脱除NO的实验研究，在N₂/O₂/NO体系中，考察加入不同钠添加剂（Na₂CO₃、NaOH、CH₃COONa）对尿素脱除NO的影响，同时探讨其在脱除NO过程中的作用机理。结果表明：在研究范围内，仅添加尿素时，NO脱除率随尿素含量的增加而增大，当输入电流为0.83A，尿素分解产生氨气的体积分数为0.3%时，NO脱除率为64.23%，此时体系中有CO生成且随尿素含量的增加而增加；少量钠添加剂的加入可显著提高NO脱除率，且脱除率随钠添加剂含量的增加而增大，此时CO生成量得到有效抑制。在加入量相同的条件下，各种钠添加剂对尿素脱除NO均有促进作用，促进作用大小依次为：NaOH > Na₂CO₃ > CH₃COONa，当加入氢氧化钠与尿素质量比为10∶10时，输入电流仅为0.83A时，脱除率可达90.71%；电流为5A，脱除率达95.71%，此时体系中几乎无CO生成。

关键词: 介质阻挡-电晕放电耦合法, 一氧化氮, 脱除率, 尿素, 添加剂

Abstract: The effects of different sodium additives (Na₂CO₃、NaOH、CH₃COONa)on the removal of the NO by urea and the mechanism of the NO removal were investigated on a self-designed dielectric barrier-corona discharge coupling device. The results indicated that,within the scope of the study,the NO removal rate increased with the increase of the urea content. The NO removal rate was 64.23% with 0.3% urea added at 0.83A current. However,the CO was produced and increased with the increasing of the dosage of urea;the addition of a small amount of sodium additives could significantly improve the NO removal rate that increased with the increase of the content of sodium additives. The amount of CO production was effectively inhibited. Under the same dosages,various sodium additives could promote the NO removal of urea. The NO removal was affected by the sodium additive in accordance with the order of NaOH > Na₂CO₃ > CH₃COONa. NO removal rate was 90.71% and 95.71% at 0.83A and 5A current,respectively;when sodium hydroxide and urea mass ratio was 10:10。while there was almost no CO.

Key words: dielectric barrier and corona discharge, nitric oxide, removal efficiency, urea, additive

中图分类号:

X511

李艳荣, 张香, 杨岚, 贺建勋, 闵小建, 樊英杰, 马晓迅. 钠添加剂对介质阻挡-电晕放电耦合法尿素脱除NO的影响[J]. 化工进展, 2018, 37(05): 1978-1984.

LI Yanrong, ZHANG Xiang, YANG Lan, HE Jianxun, MIN Xiaojian, FAN Yingjie, MA Xiaoxun. Effects of sodium additives on NO removal of urea by dielectric barrier-corona discharge coupling method[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1978-1984.

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钠添加剂对介质阻挡-电晕放电耦合法尿素脱除NO的影响

Effects of sodium additives on NO removal of urea by dielectric barrier-corona discharge coupling method

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