Study on 3D-interconnected hierarchical porous carbon supported Cu catalyst and its properties in dimethyl carbonate synthesis
Using α-cellulose and NaHCO3 as raw materials,three-dimensional(3D)-interconnected hierarchical porous carbon(HPC)with macroporous,mesoporous and microporous coexistence was obtained by the biomass foaming method.Then copper nitrate was used as the copper source,a three-dimensional(3D)-interconnected hierarchical porous carbon(HPC)supported Cu catalyst(yCu/HPC)was prepared by adjusting the copper loading amount,and its catalytic performance for methanol oxidative carbonylation was investigated.The experimental results showed that when the copper load(mass fraction)was 10%,the space-time yield(STYDMC)and conversion frequency(TOF)of 10Cu/HPC catalyst in the synthesis reaction of dimethyl carbonate(DMC)reached 1 778 mg/(g·h)and 13.8 s-1 respectively.N2 adsorption,XRD,TEM and other characterizations showed that the 3D-interconnected hierarchical porous carbon was not only conducive to the high dispersion of copper species,but also accelerated the mass transfer rate of substrate molecules,thus improving the catalytic activity.
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