煤基氮掺杂介孔炭的制备及其室温催化氧化脱除H2S性能

采用纳米二氧化硅模板辅助的共炭化方法，以煤转化副产物煤焦油的蒽油馏分为碳源、三聚氰胺为氮源，制备出高氮元素掺杂、发达介孔结构的氮掺杂介孔炭（NMCs）。结合元素分析、扫描/透射电镜观察、低温氮气吸附-脱附及X射线光电子能谱测试分析，对比考察了不同合成条件对所得样品的组成、结构及其室温催化脱硫性能的影响。结果表明，控制合适的模板剂用量、碳/氮源比例和炭化温度（700℃），所制备的样品具有适宜的氮元素掺杂量及丰富的吡啶/吡咯氮构型、较大比表面积、介孔孔径和孔容，在室温下对H₂S的氧化脱除显示出高效催化性能。

Preparation of coal derived nitrogen-doped mesoporous carbon for the catalytic oxidation of H2S at room temperature

Nitrogen-doped mesoporous carbon (NMCs) with high N doping level and developed mesoporous structure were prepared by a nanoscale-size SiO₂ template-assisted blend carbonization process, using anthracene oil (AO), one of distillates of coal tar, as carbon source and melamine (M) as nitrogen source. With the assistance of elemental analysis, FESEM/TEM, N₂ adsorption-desorption and XPS characterizations, the effects of various synthesis parameters on the chemical composition, pore structure and the catalytic performance of NMCs in H₂S oxidation at room temperature were investigated. The results show that NMC sample with suitable nitrogen doping level, abundant pyridinic/pyrrolic configurations, uniform large mesopore size, as well as high pore volume and specific surface area can be prepared by using appropriate amount of template agent, carbon/nitrogen source ratio and carbonization temperature (700℃), which exhibits high efficiency in the removal of H₂S through catalytic oxidation at room temperature.