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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Salt Template Synthesis of Nitrogen and Sulfur Co-Doped Porous Carbons as CO2 Adsorbents
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Salt Template Synthesis of Nitrogen and Sulfur Co-Doped Porous Carbons as CO2 Adsorbents

机译：盐模板合成氮气和硫磺共掺杂多孔碳作为CO 2吸附剂

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摘要

Because of their high stability, low cost, and tunable porosity, porous carbons are of great interest as CO2 adsorbents. The influences of porosity and heteroatom doping on CO2 adsorption depend on the specific adsorption conditions. In the current work, nitrogen and sulfur co-doped carbons were prepared with the assistance of an NaCl template, and the effects of different physicochemical parameters on CO2 adsorption at 20 bar were investigated. The co-doped carbons were synthesized with sodium lignosulfonate as the starting material and urea as the nitrogen source. The material showed a high specific surface area and pore volume of 973 m~2/g and 0.50 cm~3/g, respectively. Sulfur-doped carbons were also prepared without the addition of urea. Sulfur doping demonstrated positive effects on CO2 adsorption at a low pressure. The sulfur-doped carbons showed adsorption properties similar to those of the co-doped carbons. The CO2 uptake at 298 K and 20 bar was in the range of 4.3-7.5 mmol/g. The experiment results also revealed that the uptake at 20 bar correlated to the specific surface area of the carbon, while the doped heteroatoms only had secondary influences.
机译：由于它们的稳定性高，成本低，可调谐孔隙度，多孔碳是兴趣的兴趣。孔隙率和杂原子掺杂对CO 2吸附的影响取决于特异性的吸附条件。在目前的工作中，在NaCl模板的辅助下制备氮和硫和硫碳碳，并研究了不同物理化学参数对20巴的CO 2吸附的影响。将共掺杂的碳用Lignosulfonate钠作为原料和尿素作为氮源合成。该材料显示出高比表面积和973m〜2 / g和0.50cm〜3 / g的孔体积。还在没有添加尿素的情况下制备硫掺杂的碳。硫磺掺杂表现出对低压下的CO 2吸附的正效应。硫磺掺杂的碳与共掺杂碳的吸附性能类似。 298 k和20巴的CO2吸收度为4.3-7.5mmol / g。实验结果还显示出20巴的摄取与碳的比表面积相关，而掺杂的杂原子仅具有二次影响。

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