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首页> 美国政府科技报告 >Steam Regeneration of Adsorbents and Photocatalytic Destruction of Organic Compounds (PREPRINT).
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Steam Regeneration of Adsorbents and Photocatalytic Destruction of Organic Compounds (PREPRINT).

机译：吸附剂的蒸汽再生和有机化合物的光催化破坏（pREpRINT）。

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摘要

A treatment strategy is examined where organic compounds in aqueous phase are first removed by fixed-bed adsorption, followed by off-line regeneration of spent adsorbent and clean up of regeneration fluid by photocatalytic oxidation. The regeneration of adsorbents is conducted using saturated steam at 160 deg. C. This treatment strategy is examined with the following organic compounds; tetrachloroethylene (PCE), carbon tetrachloride (CCl4), p-dichlorobenzene (p-DCB), o-chlorobiphenly (o-PCB), and methyl ethyl ketone (MEK). For 6 cycles of adsorption and regeneration with each compound, the adsorption capacity of the adsorbent for PCE, p-DCB, CCl4 and MEK is completely recovered using the steam regeneration process. In the case of o-PCB, there is about 20% loss in adsorbent capacity after the first cycle, however, the adsorption capacity for cycles 2 through 6 is almost the same. The phototcatalytic oxidation process is observed to be effective for the destruction of desorbed organic compounds in the aqueous phase.

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