共查询到19条相似文献,搜索用时 140 毫秒
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废气治理的低温等离子体-催化协同净化技术 总被引:2,自引:0,他引:2
低温等离子体 催化协同净化技术具有能耗低、投资少、处理效率高、不产生二次污染等显著优点备受人们的关注。从挥发性有机化合物 (VOC)的转化、氮氧化合物的脱除、汽车尾气净化等不同废气治理的角度 ,概括了目前国内外在这方面的研究进展 ,最后提出了该项技术在环境保护领域的应用前景及研究方向 相似文献
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废气治理的低温等离子体-催化协同净化技术 总被引:25,自引:0,他引:25
低温等离子体-催化协同净化技术具有能耗低、投资少、处理效率高、不产生二次污染等显著优点备受人们的关注。从挥发性有机化合物(VOC)的转化、氮氧化合物的脱除、汽车尾气净化等不同废气治理的角度,概括了目前国内外在这方面的研究进展,最后提出了该项技术在环境保护领域的应用前景及研究方向。 相似文献
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本文讨论了目前有机污染物脱除的各种方法,并将催化活性组分担载在经Al2O3修饰的整体蜂窝陶瓷支撑体上,制备了催化氧化法脱除低浓度有机污染物(VOCs)ZDL-1催化剂,在固定床反应器进行了连续工艺条件实验,结果表明,ZDL-1催化剂具有低温启动性能好,脱除VOCs的效率高,稳定性好的突出优点,且床层压降低。为ZDL-1催化剂应用于不同过程脱除VOCs提供基础。 相似文献
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针对生物质成型燃料锅炉烟气中的颗粒物(PM)和挥发性有机物(VOCs)排放浓度高的问题,采用布袋除尘技术与生物炭吸附技术相结合的工艺技术,集成通风直接冷却技术,设计了颗粒物和挥发性有机物一体化脱除装置,并开展了脱除效果验证实验。结果表明:装置对颗粒物去除率87.8%~90.7%,VOCs去除率69.1%~72.0%,颗粒物和VOCs的排放浓度远低于《锅炉大气污染物排放标准》(GB 13271-2014),表明该装置对生物质锅炉烟气中的颗粒物和VOCs具有较好的脱除效果,研究可为生物质成型燃料锅炉烟气净化工艺提供技术支撑。 相似文献
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低温脱硝技术对于氮氧化物(NOx)的脱除意义深远,而NH3选择性催化还原(NH3-SCR) NO技术不仅在燃煤工厂里有应用,也在移动源的NOx的脱除上有应用的潜能.在低温NH3-SCR技术领域,很多非钒基的催化剂材料因其优异的催化性能受到重视.简述了低温SCR技术在能源、水泥、冶金行业的技术需求,并着重介绍了各种催化剂的SCR活性、不同催化剂的催化机制和抗SO2、H2O性能.并由此得出未来工业脱硝对催化剂的高SCR催化活性、高的N2选择性以及良好的抗SO2和H2O性能的要求. 相似文献
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吸附增效低温等离子体法去除甲苯废气的研究 总被引:4,自引:1,他引:3
采用150Hz中频高压交流电源作为低温等离子体发生源,选用典型的微孔γ-Al2O3球形颗粒吸附剂(以下简称γ-Al2O3)作为等离子体反应器填充材料,协同低温等离子体法催化降解甲苯废气。考察了在不同条件下,γ-Al2O3的甲苯吸脱附效果和吸附增效低温等离子体法的甲苯去除效果。结果表明,甲苯降解反应主要发生在γ-Al2O3的表面,甲苯的去除率在一定的浓度范围内与γ-Al2O3表面吸附的甲苯量成正比关系;填充γ-Al2O3有利于提高甲苯去除率及等离子体反应器能量利用率;γ-Al2O3对臭氧的降解表现出一定的促进作用。 相似文献
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建立了一种具有较强实用性的介质阻挡放电等离子体反应器试验装置.借助静态试验研究其放电特性,通过发动机台架试验探讨了利用低温等离子体处理柴油机2种主要有害排放物NOx和PM的效果和化学反应机理,并通过模拟试验作了处理PM的进一步验证.试验结果表明,放电功率对于低温等离子体活性成分的产生有重要影响,应当优选放电参数以获得高的放电功率从而达到更好的处理效果;采用低温等离子体处理柴油机排气,NOx总量变化不大,主要将NO转化成NO2;低温等离子体可以有效去除柴油机排气中的PM,去除率随能量密度的增大而提高. 相似文献
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Xiangjie Gong Yanchun Lin Xiaodong Li Angjian Wu Hao Zhang Jianhua Yan 《Journal of the Air & Waste Management Association (1995)》2020,70(2):138-157
ABSTRACTThis work provides a systematic review on the decomposition of volatile organic pollutants in flue gas through the gliding arc (GA) plasma technology. To begin with, the basic mechanisms of GA plasma generation are summarized and three characteristic stages existed during the GA plasma generation process are revealed: gas breakdown stage, equilibrium stage, and non-equilibrium stage. Then, the types of GA reactors are comparatively illustrated. Possible destruction mechanisms of volatile organic compounds (VOCs) by GA plasma are discussed by taking chloroform, benzene, and methanol as examples. Furthermore, the effects of many operating parameters on the VOCs destruction efficiency are comprehensively analyzed. Simultaneously, the product distribution, energy cost, technical and economic during the whole decomposition process are considered. Finally, the advantages and disadvantages of GA plasma and its further development trend are concluded from the academic and industrial application of GA plasma in VOCs decomposition.Implications: This paper comprehensively describes the principle, characteristics, research progress and engineering application examples of the degradation of volatile organics by gliding arc discharge plasma, so that readers can fully understand the degradation of volatile organics by gliding arc discharge plasma and provide theoretical basis for the industrial application of the degradation of volatile organics by gliding arc discharge plasma. 相似文献
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Degradation of phenol in mists by a non-thermal plasma reactor 总被引:1,自引:0,他引:1
A link tooth wheel-cylinder non-thermal plasma reactor was set up to investigate the degradation of phenol in the mists. In addition, the decomposition efficiency of phenol, TOC removal, and byproduct formation were investigated. The stable discharge was achieved in both air and the mist condition. The decomposition efficiency and TOC removal increased with increasing the input power. For the input power of 3.6 W, the phenol decomposition and TOC removal reached 90% and 47%, respectively. Phenol degradation byproducts were identified as small molecular organic acids, including formic acid, acetic acid, and oxalic acid. Their masses in the trapped solutions first increased and then decreased slightly with increasing the input power. Therefore, the biodegradation capacity of the phenol degradation byproducts can be improved. 相似文献
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K. Hadidi D.R. Cohn S. Vitale L. Bromberg 《Journal of the Air & Waste Management Association (1995)》2013,63(2):225-228
ABSTRACT A tunable electron beam generated plasma system has been developed for selective cold plasma treatment of dilute concentrations (1-3,000 ppm range) of hazardous compounds in gaseous waste treatment. This system, referred to as the Tunable Hybrid Plasma (THP), has shown a high degree of efficiency and effectiveness in both laboratory and field tests. Decomposition energy requirements are in the 100 eV per molecule range for treatment of carbon tetrachloride and 10 eV for treatment of trichloroethylene. A cost comparison has been made between the Tunable Hybrid Plasma (THP) technology and three conventional technologies used for emission control of volatile organic compounds (VOCs): granular activated carbon, thermal incineration, and catalytic oxidation. In addition to its environmentally attractive features, THP technology has the potential to be lower cost than other technologies over a range of concentrations and flow rates. Cost projections for the THP system for decomposition of trichloroet-hylene are around 50 cents/lb for initial concentrations in the few hundred ppm range and flow rates of 5,000 cfm or greater and around $1/lb for 1,000 cfm flow rates. Cost projections for carbon tetrachloride and trichloroethane decomposition using the THP technology are several dollars per pound. The costs for THP treatment are generally significantly lower than costs for use of granular activated carbon and are also quite competitive with costs for thermal incineration and catalytic oxidation. 相似文献
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Henry C. Wohlers 《Journal of the Air & Waste Management Association (1995)》2013,63(12):1276-1279
Abstract The destruction of parts per million (ppm) levels of volatile organic compounds in a dry air stream by high–energy electron–beam irradiation has been investigated in a pilot plant at the University of Tennessee Space Institute, Tullahoma, Tennessee. In a series of experiments, dry air contaminated with various VOCs in the concentration range of 50–1000 ppm were treated in the UTSI pilot plant to determine the extent of destruction at various electronbeam dose levels. The destruction removal efficiency was determined as a function of the electron beam irradiation dose. The results suggest a charge transfer reaction as the major decomposition mechanism. A theoretical foundation of the process, along with a simple first–generation reaction kinetics model, a summary of the results from the pilot plant flow reactor, and a preliminary cost analysis for a fullscale detoxification plant using currently available electronbeam gun technology are presented in this paper. 相似文献