Abstract
AbstractThe production of isophthalic acid (IPA) from the oxidation of m‐xylene (MX) with air can be sped up by Co(II) and phosphotungstic acid (HPW) loaded on activated carbon. In this paper, activated carbon is modified with a ZnCl2 solution to improve the catalytic performance of the HPW@C catalyst. The experiments indicate that the optimum modification condition is the carbon immersed in a 0.10 mol L−1 ZnCl2 solution for 6 h at the temperature of 40 °C followed by being carbonized at 600 °C for 4 h. The characterization proves that the ZnCl2 modification leads to the increase of surface area and acidic groups on the activated carbon. The MX conversion catalyzed by the HPW@C prepared from the carbon modified is 7.0 % over that by the HPW@C from the original carbon and the IPA produced by the modified sample is 78.9 % over that produced by the original one.
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