期刊
ADSORPTION SCIENCE & TECHNOLOGY
卷 34, 期 4-5, 页码 307-319出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/0263617416653120
关键词
NO2; activated carbon; metal oxide; air filtration; enhanced adsorbents
资金
- German Federal Ministry of Economics and Technology
- IGF [17516N]
The reduction of NO2 in air at ambient temperatures with activated carbons can be increased by the infiltration of metal oxide nanoparticles into the sorbents. The NO2 is first adsorbed to the activated carbon and subsequently catalytically reduced to physiologically neutral substances by the metal oxides. The catalytic reduction at ambient temperatures is rather slow. In a former study concerning the application in cabin air filters, it was shown that the modification of activated carbon with 5 wt% CuO/ZnO leads to reduced breakthrough of NO2 and that the adsorbent was able to regenerate between repeated NO2 adsorption cycles. Here we show that the efficiency of the sorbent can be more than doubled by increasing the metal oxide infiltration to 20 wt% whereas a further increase in loading yields no additional improvement, due to a partial transformation of the oxidic compounds.
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