H_2O_2/O_3催化氧化改性活性炭研究

Study on the Modification of Active Carbon by H_2O_2/O_3 Catalytic Oxidation

采用H2O2/O3催化氧化改性活性炭。以含氧官能团总量为主要指标、比表面积和碘吸附值为辅助指标评价改性效果。在活性炭质量和H2O2体积一定的条件下,考察了H2O2质量分数、O3浓度、反应时间及反应温度等因素对活性炭性能的影响。在H2O2质量分数为10%、O3浓度为4.32 mg.L-1、反应时间为2.5 h、反应温度为50℃的最优改性条件下,活性炭的含氧官能团总量为1.525 mmol.g-1,比改性前提高61.38%。

The active carbon was modified by hydrogen peroxide and ozone catalytic oxidation.With total content of oxygen functional groups as a key indicator,specific surface area and iodine adsorption as ancillary indicators,the modification of active carbon was evaluated.The effects of H2O2 mass fraction,O3 concentration,reaction time and reaction temperature on the properties of modified active carbon were investigated with certain conditions of quality of active carbon and volume of H2O2.Optimization of modified conditions were obtained as follows：hydrogen peroxide mass fraction of 10%,O3 concentration of 4.32 mg·L-1,reaction time of 2.5 h,reaction temperature of 50℃.Under above optimum conditions,the total content of oxygen functional groups of active carbon was 1.525 mmol·g-1,which was increased 61.38% than that of unmodified active carbon.