低温等离子体协同木纤维柴油机尾气净化器性能试验
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摘要
为了控制柴油机尾气污染物排放,研制低温等离子体协同木纤维净化碳烟颗粒物(PM)和NO_x的尾气净化器,利用高压脉冲电晕放电产生低温等离子体,木纤维滤芯一方面作为纳米级CeO_2催化剂的载体,另一方面可以有效捕集PM。设计尾气净化器性能测试试验台,对净化器净化PM和NO_x的性能进行试验研究。以一定比例浓度的N_2、NO和O_2混合组成柴油机的模拟尾气,将PM提前加载于木纤维滤芯上,气体温度控制在100℃~230℃范围内。试验结果表明:木纤维可为催化剂提供良好的催化环境,催化剂对净化器净化PM和NO_x起到了催化促进作用;木纤维滤芯PM负载量的增加可提高净化器对NO_x的净化效率;净化器输入电压升高可增加其对PM和NO_x的净化效率。
To reduce the emissions of pollutants from diesel exhaust,the plasma wood fiber purifier was developed by combining plasma with wood-fiber-purified soot particulate matter( PM) and nitric oxide( NO_x). Nonthermal plasma was produced by high-voltage pulse corona discharge. On one hand,the wood fiber core was used as the nanoscale cerium oxide( CeO_2) catalyst carrier. On the other hand,the wood fiber captured PM effectively. A test bench was designed to measure the factors that influence the performance of PM and NO_x. The simulated exhaust gas was composed of a certain proportion of N_2,NO,and O_2. PM was loaded on the wood fiber filter in advance.Furthermore,the gas temperature was controlled in the range of 100 ℃ to 230 ℃. The results of experimental study indicate that the wood fiber can provide a qualified catalytic environment for nanoscale CeO_2 and the purification efficiency of the purifier for NO_x and PM can be enhanced by catalyst; the PM mass loaded on the filter core influences the purification efficiency for NO_x and the purification efficiency increases with the increase in PM mass; and the input voltage of the purifier improves its purification efficiency for NO_x and PM.
To reduce the emissions of pollutants from diesel exhaust,the plasma wood fiber purifier was developed by combining plasma with wood-fiber-purified soot particulate matter( PM) and nitric oxide( NO_x). Nonthermal plasma was produced by high-voltage pulse corona discharge. On one hand,the wood fiber core was used as the nanoscale cerium oxide( CeO_2) catalyst carrier. On the other hand,the wood fiber captured PM effectively. A test bench was designed to measure the factors that influence the performance of PM and NO_x. The simulated exhaust gas was composed of a certain proportion of N_2,NO,and O_2. PM was loaded on the wood fiber filter in advance.Furthermore,the gas temperature was controlled in the range of 100 ℃ to 230 ℃. The results of experimental study indicate that the wood fiber can provide a qualified catalytic environment for nanoscale CeO_2 and the purification efficiency of the purifier for NO_x and PM can be enhanced by catalyst; the PM mass loaded on the filter core influences the purification efficiency for NO_x and the purification efficiency increases with the increase in PM mass; and the input voltage of the purifier improves its purification efficiency for NO_x and PM.
引文
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[18]郭秀荣,杜丹丰,亓占丰,等.齿形木纤维柴油车尾气微粒捕集器过滤效率模型与试验[J].农业工程学报,2016,32(7):66-71.GUO Xiurong,DU Danfeng,QI Zhanfeng,et al. Filtering efficiency model and experiment of gear-shaped wood fiber diesel particle filter[J]. Transactions of the Chinese society of agricultural engineering,2016,32(7):66-71.
[19]郭秀荣,刘跃雄,杜丹丰.长木纤维滤芯柴油车PM过滤装置冷却器:中国,203822417U[P]. 2014-09-10.GUO Xiurong,LIU Yuexiong,DU Danfeng. Cooler for long wood fiber filter element diesel vehicle PM(Particulate Matter)filtering device:CN,203822417U[P].2014-09-10.
[20]李翔,杨冬霞,常仕英,等.轻型柴油机尾气排放后处理技术进展[J].贵金属,2015,36(2):70-76.LI Xiang,YANG Dongxia,CHANG Shiying,et al. Progress in after-treatment technology for light-duty diesel engine exhaust[J]. Precious metals,2015,36(2):70-76.
[21]ZHANG Chunyang,SHANG Kefeng,LU Na,et al. Optimization of discharge types and electrode structure in a cylinder discharge reactor with saw-wheel array electrodes[J]. Journal of physics:conference series,2013,418(1):012098.
[22]SHI Y X,CAI Y X,LI X H,et al. TANG. Meachanism and Method of DPF Regeneration by oxygen radical generated by NTP technology[J]. International journal of automotive technology,2014,15(6):871-876.
[23]刘冀,冯发达,刘振,等.低温等离子体辅助去除含碳固态混合物[J].化工进展,2014,33(12):3387-3392,3398.LIU Ji,FENG Fada,LIU Zhen,et al. Non-thermal lasma assisted incineration of particulate matter[J]. Chemical industry and engineering progress,2014,33(12):3387-3392,3398.
[24]刘立东,史永万,高俊华,等.低温等离子体对柴油机尾气净化效果的研究[J].汽车工程,2013,35(2):116-120.LIU Lidong,SHI Yongwan,GAO Junhua,et al. A research of the effects of non-thermal plasma on the emission control of diesel engine[J]. Automotive engineering,2013,35(2):116-120.
[2]SAIYASITPANICH P,KEENER T C,KHANG S J,et al.Removal of diesel particulate matter(DPM)in a tubular wet electrostatic precipitator[J]. Journal of electrostatics,2007,65(10/11):618-624.
[3]YOSHIDA K,KUWAHARA T,KUROKI T,et al. Diesel NOxaftertreatment by combined process using temperature swing adsorption,NOxreduction by nonthermal plasma,and NOxrecirculation:improvement of the recirculation process[J]. Journal of hazardous materials,2012,231-232:18-25.
[4]SONG Chonglin,BIN Feng,TAO Zemin,et al. Simultaneous removals of NOx,HC and PM from diesel exhaust emissions by dielectric barrier discharges[J]. Journal of hazardous materials,2009,166(1):523-530.
[5]BABAIE M,DAVARI P,TALEBIZADEH P,et al. Study of particulate matter removal mechanism by using nonthermal plasma technology[C]//Proceedings of the 13th International Conference on Electrostatic Precipitation XIII ICESP-2013. Bangalore,India,2013.
[6]陈明功,颜凌燕,汪晓艳,等.介质阻挡放电协同铜氧化物催化剂脱除NOx反应研究[J].科技导报,2008,26(23):52-55.CHEN Minggong,YAN Lingyan,WANG Xiaoyan,et al.NOxremoval reaction with copper oxide catalyst assisted dielectric barrier discharge[J]. Science&technology review,2008,26(23):52-55.
[7]裴梅香,林赫,上官文峰,等.离子体辅助La0. 9K0. 1CoO3同时催化去除NOx和柴油机碳烟微粒的试验研究[J].燃烧科学与技术,2005,11(3):278-281.PEI Meixiang,LIN He,SHANGGUAN Wenfeng,et al.Simultaneously catalytic removal NOxand diesel PM over La0. 9K0. 1CoO3catalysis assisted by plasma[J]. Journal of combustion science and technology,2005,11(3):278-281.
[8]VINH T Q,WATANABE S,FURUHATA T,et al. Fundamental study of NOxremoval from diesel exhaust gas by dielectric barrier discharge reactor[J]. Journal of mechanical science and technology,2012,26(6):1921-1928.
[9]KANG W S,LEE D H,LEE J O,et al. Combination of plasma with a honeycomb-structured catalyst for automobile exhaust treatment[J]. Environmental science&technology,2013,47(19):11358-11362.
[10]赵如金,储金宇,王瑞静,等.低温等离子体催化处理汽车尾气[J].高电压技术,2007,33(2):174-177.ZHAO Rujin,CHU Jinyu,WANG Ruijing,et al. Purification of automotive exhaust by catalysis-assisted low temperature plasma[J]. High voltage engineering,2007,33(2):174-177.
[11]GUAN Bin,LIN He,CHENG Qi,et al. Removal of NOx with selective catalytic reduction based on nonthermal plasma peroxidation[J]. Industrial&engineering chemistry research,2011,50(9):5401-5413.
[12]李晨,舒新前,王苏健,等.基于低温等离子体协同催化脱除氮氧化物和碳烟颗粒的研究[J].广东化工,2015,42(20):1-2.LI Chen,SHU Xinqian,WANG Sujian,et al. Research of the effects of non-thermal plasma in conjunction with catalyzer on the removal NOxand PM in emission control of diesel engine[J]. Guangdong chemical industry,2015,42(20):1-2.
[13]郭秀荣,刘跃雄,杜丹丰.微米木纤维滤芯柴油机PM过滤装置冷却系统研究[J].森林工程,2016,32(2):53-57.GUO Xiurong,LIU Yuexiong,DU Danfeng. Study on cooling system of pm filter device of micron wood fiber filter element[J]. Forest engineering,2016,32(2):53-57.
[14]杨华龙,齐英杰,郭秀荣,等.柴油车尾气堇青石DPF检测的研究[J].森林工程,2015,31(4):68-72.YANG Hualong,QI Yingjie,GUO Xiurong,et al. Research on testing of diesel exhaust cordierite DPF[J].Forest engineering,2015,31(4):68-72.
[15]WANG Hui,LI Xiangxiang,CHEN Ping,et al. An enhanced plasma-catalytic method for DeNOxin simulated flue gas at room temperature[J]. Chemical communications,2013,49(81):9353-9355.
[16]张洁.稀土二氧化铈用于机动车尾气CO氧化和NOx还原的DFT+U研究[D].上海:华东理工大学,2014.ZHANG Jie. A DFT+U study of CO oxidation and NOx reduction over rare earth CeO2catalyst[D]. Shanghai:East China University of Science and Technology,2014.
[17]郭秀荣,杜丹丰,马岩.炭化微米木纤维滤芯柴油机排放纳米颗粒吸附特性[J].江苏大学学报(自然科学版),2013,34(1):7-12.GUO Xiurong,DU Danfeng,MA Yan. Adsorption properties of carbonized micron wood fiber filter for nanoparticles emitted by engine[J]. Journal of Jiangsu University(natural science edition),2013,34(1):7-12.
[18]郭秀荣,杜丹丰,亓占丰,等.齿形木纤维柴油车尾气微粒捕集器过滤效率模型与试验[J].农业工程学报,2016,32(7):66-71.GUO Xiurong,DU Danfeng,QI Zhanfeng,et al. Filtering efficiency model and experiment of gear-shaped wood fiber diesel particle filter[J]. Transactions of the Chinese society of agricultural engineering,2016,32(7):66-71.
[19]郭秀荣,刘跃雄,杜丹丰.长木纤维滤芯柴油车PM过滤装置冷却器:中国,203822417U[P]. 2014-09-10.GUO Xiurong,LIU Yuexiong,DU Danfeng. Cooler for long wood fiber filter element diesel vehicle PM(Particulate Matter)filtering device:CN,203822417U[P].2014-09-10.
[20]李翔,杨冬霞,常仕英,等.轻型柴油机尾气排放后处理技术进展[J].贵金属,2015,36(2):70-76.LI Xiang,YANG Dongxia,CHANG Shiying,et al. Progress in after-treatment technology for light-duty diesel engine exhaust[J]. Precious metals,2015,36(2):70-76.
[21]ZHANG Chunyang,SHANG Kefeng,LU Na,et al. Optimization of discharge types and electrode structure in a cylinder discharge reactor with saw-wheel array electrodes[J]. Journal of physics:conference series,2013,418(1):012098.
[22]SHI Y X,CAI Y X,LI X H,et al. TANG. Meachanism and Method of DPF Regeneration by oxygen radical generated by NTP technology[J]. International journal of automotive technology,2014,15(6):871-876.
[23]刘冀,冯发达,刘振,等.低温等离子体辅助去除含碳固态混合物[J].化工进展,2014,33(12):3387-3392,3398.LIU Ji,FENG Fada,LIU Zhen,et al. Non-thermal lasma assisted incineration of particulate matter[J]. Chemical industry and engineering progress,2014,33(12):3387-3392,3398.
[24]刘立东,史永万,高俊华,等.低温等离子体对柴油机尾气净化效果的研究[J].汽车工程,2013,35(2):116-120.LIU Lidong,SHI Yongwan,GAO Junhua,et al. A research of the effects of non-thermal plasma on the emission control of diesel engine[J]. Automotive engineering,2013,35(2):116-120.
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