In this study, a novel synthesis strategy for sulfur doped carbon (SDC) was developed. Dipotassium anthraquinone-1,8-disulfonate (DAD) was used as the starting material, which produced highly porous SDC after pyrolysis at 600–900 °C. DAD played the roles of carbon and sulfur sources simultaneously, and its decomposition product K₂SO₄ activated the carbon to generate porosity at high temperature. The yielded SDCs exhibited high level of sulfur doping and high porosity. Effects of pyrolysis temperature on physicochemical properties of the SDCs were studied with various techniques. CO₂ adsorption performances of the SDCs were tested at 0 and 25 °C with pressure up to 20 bar. Influences of sulfur doping on the adsorption capability, isosteric heat, and CO₂/N₂ selectivity were analyzed and discussed. The experiment results revealed that sulfur doping had positive effects on CO₂ uptake at 1 bar, but adsorption at 20 bar was mainly decided by carbon’s total porosity.

在这项研究中，开发了一种新的硫掺杂碳（SDC）合成策略。蒽醌-1,8-二磺酸双钾盐（DAD）被用作起始原料，在600–900°C的温度下热解后产生高度多孔的SDC。DAD同时发挥碳和硫源的作用，其分解产物K ₂ SO ₄活化了碳，在高温下产生孔隙。产生的SDC显示出高水平的硫掺杂和高孔隙率。用各种技术研究了热解温度对SDCs理化性质的影响。SDC的CO ₂吸附性能在0和25°C和最高20 bar的压力下进行了测试。硫掺杂对吸附能力，等排热和CO的影响_对2 / N ₂选择性进行了分析和讨论。实验结果表明，硫掺杂对1 bar的CO ₂吸收有积极影响，但20 bar的吸附主要取决于碳的总孔隙率。