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考察了Mn含量和水含量对AgMn/HZSM-5(AgMn/HZ)催化剂上室温O3氧化(OZCO)脱除空气中苯的影响.研究发现,Mn含量为2.4 wt%的AgMn/HZ催化剂(AgMn/HZ(2.4))具有大的比表面积和高的Mn Ox分散度,OZCO活性和稳定性最高.反应后的程序升温脱附结果表明,2.4 wt%的Mn含量能有效抑制苯和甲酸在催化剂上的残留.当Mn含量≤t2.4 wt%时,催化剂分解O3的活性在苯氧化过程中占主导;当Mn含量>2.4 wt%时,苯的活化起主要作用.基于AgMn/HZ(2.4)催化剂优越的反应活性和稳定性,进一步研究了湿气流中该催化剂上苯的氧化.与干气流相比,水汽的加入能显著提高催化剂的反应活性和稳定性,且以0.1–0.2 vol%水含量时最优.
The effect of Mn content and water content on benzene removal from air by OZCO at ambient temperature was investigated. It was found that AgMn / HZ catalyst with 2.4 wt% Mn (AgMn / HZ) /HZ(2.4)) has a large specific surface area and high Mn Ox dispersion, OZCO activity and stability of the highest temperature programmed desorption results show that 2.4 wt% of Mn content can effectively inhibit the benzene and formic acid in the catalyst When the content of Mn is less than 2.14 wt%, the activity of catalyst decomposition O3 is dominant in the process of benzene oxidation and the activation of benzene plays a major role when the content of Mn is more than 2.4 wt% .Based on the results of AgMn / HZ ( 2.4), the oxidation and oxidation of benzene on the catalyst in wet gas stream were further studied.The addition of water vapor can significantly improve the reactivity and stability of the catalyst compared with the dry gas flow, % Water content of the best.