Abstract
The feasibility of using silica supported sulfuric acid (SSSA) for removing o-xylene from gas streams has been investigated. Four SSSA samples containing different H2SO4 loadings were prepared using wetness impregnation method, and their texture properties were characterized using N2 adsorption/desorption isotherms. The adsorption behaviors of o-xylene by the SSSAs were determined in a flow-type fixed bed system, with the effects of adsorption temperature and H2SO4 loading on the performance of SSSA removal were studied. The obtained results showed that the removal capacity increased for higher H2SO4 loadings, with SSSA-20 exhibiting the highest removal capacity for o-xylene for an optimum temperature range of 130˜140 °C. This method provides a new reaction-type adsorption mechanism that affords a promising technology for treating other aromatic VOCs.
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