The development of advanced and innovative biomaterials with porous structural characteristics for the capture of fluorinated gases (F-gases) is important to contribute to the reduction of emissions of these gases with very high global warming potential. In this work, four biocarbons (CC-1:3HPO, CC-1:1HPO, CC-KCO and CC-CO) were produced by chemical and physical activation of corn cob biomass (CC). The adsorption equilibria of difluoromethane (R-32), pentafluoroethane (R-125), 1,1,1-tetrafluoroethane (R-125), 1,1,2-tetrafluoroethane (R-134a), sulphur hexafluoride (SF), and nitrogen (N) on these biocarbons were determined at 303.15 K. The highest adsorption capacities were obtained for CC-KCO and CC-CO and a full characterization was also performed for these biomaterials at 283.15 and 323.15 K. On the other hand, the selectivities of SF/N and the commercial refrigerants R-410A, R-407C, and R-407F were estimated using the Ideal Adsorption Solution theory (IAST). The results obtained for SF/N show that the biocarbon CC-KCO stands out from the other materials. In addition, the CC-CO shows a preference for R-32 over R-125 for the separation of the R-410A. Finally, CC-KCO has a greater preference for R-134a over R-32 and R-125 in the R-407C and R-407F blends. Overall, these novel biocarbons improve the separation and purification of the F-gases under study, facilitating their application on a pilot scale.

中文翻译：

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探索生物质衍生碳分离具有高全球变暖潜力的氟化气体的潜力


开发具有多孔结构特征的先进创新生物材料来捕获氟化气体（F-气体）对于减少这些具有极高全球变暖潜力的气体的排放非常重要。在这项工作中，通过化学和物理活化玉米芯生物质（CC）生产了四种生物碳（CC-1:3HPO、CC-1:1HPO、CC-KCO 和 CC-CO）。二氟甲烷(R-32)、五氟乙烷(R-125)、1,1,1-四氟乙烷(R-125)、1,1,2-四氟乙烷(R-134a)、六氟化硫(SF)的吸附平衡，这些生物碳上的氮 (N) 和氮 (N) 在 303.15 K 下测定。CC-KCO 和 CC-CO 获得了最高的吸附容量，并且还在 283.15 和 323.15 K 下对这些生物材料进行了全面表征。使用理想吸附溶液理论 (IAST) 估算 SF/N 和商用制冷剂 R-410A、R-407C 和 R-407F 的选择性。 SF/N 获得的结果表明生物碳 CC-KCO 从其他材料中脱颖而出。此外，对于 R-410A 的分离，CC-CO 显示出 R-32 优于 R-125。最后，在 R-407C 和 R-407F 共混物中，CC-KCO 更倾向于 R-134a，而不是 R-32 和 R-125。总体而言，这些新型生物碳改善了所研究的含氟气体的分离和纯化，促进了其中试规模的应用。