本文選題：低溫等離子體 + 催化��； 參考：《武漢工程大學》2015年碩士論文

【摘要】：揮發(fā)性有機化合物(VOCs)的排放量逐年增加,對環(huán)境造成了嚴重污染。低溫等離子體處理VOCs效率高、適用范圍廣。而單一低溫等離子體技術(shù)有著能耗高和副產(chǎn)物多等缺點,而低溫等離子體協(xié)同催化技術(shù)有著去除率高、CO_2選擇性好及產(chǎn)生二次污染物少等優(yōu)點。本文在查閱大量文獻的基礎(chǔ)上,分析了等離子體協(xié)同催化劑處理VOCs的反應(yīng)機制,并對催化劑存在的問題進行了探討。本論文主體共分為四個部分:(1)采用單獨等離子體放電降解苯的有機廢氣,測試苯的初始濃度、氣體流速、放電功率對苯的降解率效果的影響。為后續(xù)實驗提供對照。(2)采用水熱法制備α-MnO_2和β-MnO_2催化劑,實驗結(jié)果表明,β-MnO_2催化劑結(jié)合等離子體催化降解苯的效果更佳,功率為36W時,尾氣中臭氧含量下降72.5%;苯的降解率為64.1%。(3)以β-MnO_2為基礎(chǔ),利用浸漬法制備了CuMnO_x催化劑,應(yīng)用SEM、XRD、XPS、N_2吸附-脫附等方法對催化劑進行了表征;利用PDC式反應(yīng)器探討了苯降解的效果;探討了反應(yīng)條件(初始濃度、流速、功率)、催化劑種類、以及焙燒溫度對苯降解的影響,并且制定出了復合催化劑的最佳制備條件。實驗結(jié)果表明,銅錳摩爾比為1:4,焙燒溫度500℃,焙燒4h時催化性能最好。功率為36W時,尾氣中臭氧含量降低80.0%;苯的降解率可達到72.3%。(4)以β-MnO_2為基礎(chǔ),利用浸漬法制備FeMnO_x催化劑,與CuMnO_x催化劑相比,FeMnO_x催化劑的活性較好,鐵錳摩爾比為1:3,焙燒溫度600℃,焙燒4h時催化性能最好。功率為36W時尾氣中臭氧含量降低82.5%;苯的降解率可達74.5%。
[Abstract]:The emission of volatile organic compounds (VOCs) increased year by year, which caused serious pollution to the environment. Low temperature plasma treatment of VOCs has high efficiency and wide application range. The single low temperature plasma technology has the disadvantages of high energy consumption and more by-products, while the low temperature plasma co-catalytic technology has the advantages of high removal efficiency, good selectivity and less secondary pollutants. Based on a large number of literatures, the mechanism of plasma synergistic catalyst for VOCs treatment is analyzed, and the existing problems of the catalyst are discussed. The main body of this thesis is divided into four parts: 1) the effect of the initial concentration of benzene, gas flow rate and discharge power on the degradation efficiency of benzene was measured by using the single plasma discharge to degrade the organic waste gas of benzene. 偽 -MnO _ 2 and 尾 -MnO _ 2 catalysts were prepared by hydrothermal method. The results showed that 尾 -MnO _ 2 catalyst combined with plasma was better for the degradation of benzene, and the power was 36W. On the basis of 尾 -MnO-2, CuMnO_x catalyst was prepared by impregnation method, and characterized by SEMXRDD-XPSS-N2 adsorption-desorption method, the effect of benzene degradation was discussed by PDC reactor. The effects of reaction conditions (initial concentration, flow rate, power, type of catalyst and calcination temperature on the degradation of benzene) were discussed. The experimental results show that the best catalytic performance is obtained when the molar ratio of copper and manganese is 1: 4, the calcination temperature is 500 鈩，

本文編號：1921929