中南大学徐翔

The construction of ultrahigh efficiency benzene molecular transport channel and application on pressure swing adsorption

发布时间：2025-04-10

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关键字：: Activated carbon; Adsorption efficiency; Benzene; Dynamic adsorption; Petroleum coke; Pressure swing adsorption

摘要：: Benzene is a harmful VOC, which usually form a certain concentration of gas. The transport of benzene molecules in the pore structure is the key to benzene gas treatment. Here we report an effective synthesis of petroleum coke-based porous carbon with ultrahigh efficiency benzene molecular transport channels. These mesopore-micropore channels can effectively improve the transport of benzene molecules in the interior of pore structure, and the graphitization also enhances the adsorption for benzene. The results shows that the adsorption efficiency of PC-10 with the graphitized mesopore-micropore channels reaches 90.22 %, which is 22.47 % higher than that of PC-0. Moreover, the complete structure of graphitized mesopore-micropore channel was observed, which is constituted of mesoporous channel, branch structure, cavity structure, microporous channel, and graphitized interior surface. Compared with microporous carbon in PSA, the breakthrough time of PC-10 is extended by 22 % and the effective amount is saved by 25 %. Due to the co-effect of low desorption activation energy and micropore-mesopore channels, the enrichment ratio of PC-10 reaches 3.46 in PD step, which is 21 % higher than that of microporous material. Our study provided an effective strategy for the synthesis of porous materials, and developed its application on PSA for benzene.

发布期刊链接：: https://www.sciencedirect.com/science/article/pii/S0169433225000352?via%3Dihub