期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 46, 期 22, 页码 12648-12654出版社
AMER CHEMICAL SOC
DOI: 10.1021/es303069j
关键词
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资金
- Natural Science Foundation of China [50978248, 20807050, 20725723]
- National Basic Research Program of China [2010CB732300]
- National High Technology Research and Development Program of China [2012AA063101]
- Australian Research Council (ARC) through Discovery Project program [DP0987969, DP1095861]
Graphitized carbons with mesoporous and macroporous structures were synthesized by a facile template-catalysis procedure using resorcinol and formaldehyde as carbon precursors and particulate hydrated metal oxides as both template and catalyst precursors. The materials were used as novel adsorbents for low-concentration benzene vapor. Furthermore, on the basis of the good electrical conductivities associated with the graphitized structures, an electrothermal desorption technique, which involved passing electric currents through the adsorbents to generate Joule heat, was employed to regenerate the saturated adsorbents and 0 produce enriched benzene vapors. In comparison to micro-porous activated carbon, the porous graphitized carbons could afford a much quicker and more efficient regeneration by electrothermal desorption technique due to their enhanced conductivity and larger pore sizes. In addition, the concentration of the desorbed organics could be controlled by adjusting the applied voltages, which might be interesting for practical secondary treatment. It is promising that the joint utilization of porous graphitized carbon adsorbents and electrothermal desorption technique might develop effective and energy-saving processes for VOCs removal.
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