發(fā)布時間：2019-02-09 14:24

【摘要】：苯排放到大氣中會影響空氣質(zhì)量和人體健康,其排放需要得到控制。為此,利用裝有微量貴金屬(Au、Ag和Pt,負(fù)載量(質(zhì)量分?jǐn)?shù))0.1×10 6~10×10 6)催化劑的介質(zhì)阻擋放電(DBD)反應(yīng)器分解模擬空氣中的苯,研究了苯在不同貴金屬負(fù)載量、不同反應(yīng)溫度和不同能量密度條件下的分解特性,并對苯的分解機(jī)理做了探討。實驗結(jié)果表明:1)和無催化劑的DBD反應(yīng)器相比,載有貴金屬催化劑的DBD反應(yīng)器能顯著增加苯的去除率。2)在反應(yīng)溫度為25℃和能量密度為400 J/L的條件下,各催化劑對苯的最大去除率按從高到低排序為:Au(93.8%)Pt(81.1%)Ag(81.0%)無催化劑(55%)。3)苯分解的氣相產(chǎn)物為CO和CO2,在催化劑負(fù)載量和反應(yīng)溫度一定的條件下,苯的去除率隨能量密度的增加而增加。4)在催化劑負(fù)載量、能量密度一定的條件下,苯的去除率隨反應(yīng)溫度的增加而增加。
[Abstract]:Benzene emissions into the atmosphere will affect air quality and human health, its emissions need to be controlled. In this paper, the benzene in the air was decomposed by a (DBD) reactor with a small amount of precious metals (Au,Ag and Pt, loading amount (mass fraction) 0.1 脳 10 ~ (6) ~ (10 脳 10 ~ (-6). The benzene loading in different noble metals was studied. The decomposition characteristics of benzene at different reaction temperatures and energy densities were discussed, and the decomposition mechanism of benzene was also discussed. The experimental results show that: 1) compared with the DBD reactor without catalyst, the DBD reactor with noble metal catalyst can significantly increase the removal rate of benzene. 2) the reaction temperature is 25 鈩，

本文編號：2419047