Enhanced liquid phase catalytic hydrodechlorination of 2,4-dichlorophenol over mesoporous carbon supported Pd catalysts

Supported Pd catalysts on ordered mesoporous carbon (OMC) and activated carbon (AC) were prepared and their catalytic behavior for the liquid phase catalytic hydrodechlorination (HDC) of 2,4-dichlorophenol was investigated. In comparison with Pd/AC, Pd particles of Pd/OMC were effectively confined in the mesopores of OMC, resulting in high Pd dispersion and Pd2+ content. Accordingly, Pd/OMC exhibited higher catalytic activity than Pd/AC. Moreover, increasing catalyst reduction temperature lowered the catalytic activities and favored stepwise HDC of 2,4-dichlorophenol.

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► Pd/OMC has higher Pd dispersion and Pd2+ content than Pd/AC.
► Pd/OMC displays higher catalytic activity than Pd/AC for the liquid phase catalytic HDC of 2,4-DCP.
► Increasing catalyst reduction temperature lowers the catalytic activities of the catalysts and favors stepwise HDC of 2,4-DCP.