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• W3197342175 abstract "Effective recovery of hydrogen from refinery off-gas and coke oven gas, in which hydrogen and methane are key components, is increasingly important for the development of hydrogen energy. In this paper, we introduced a new energy efficient process for hydrogen purification from CH 4 /H 2 mixture. Firstly, we conducted a phase equilibrium experimental study for CH 4 /H 2 in zeolitic imidazolate framework-8 (ZIF-8)/glycol–water slurry. The simple absorption and desorption configuration is adopted for the continuous separation of CH 4 /H 2 using ZIF-8/glycol–water slurry. The multi-stage pseudo-absorption modeling approach was introduced for the modeling and simulation of the absorption–adsorption and desorption columns via using multiple flash modules in Aspen Plus. The binary interaction parameters in the thermodynamic model were fitted by experimental data within an acceptable error (4.93%). The operating conditions (i.e., the number of theoretical stages, feed stage, flash pressure, and desorption pressure) were determined to increase H 2 concentration in product and H 2 recovery ratio. The energy performance of the process was also evaluated. Given the feed gas contains 50 mol% H 2 , the gas–slurry volume ratio of 43.27 is required to produce 95 mol% H 2 with a high recovery of 97.94%. The total energy consumption per unit volume of product is 0.06254 kW·h/Nm 3 . Results indicate that the hybrid absorption-adsorption process is a promising energy efficient technique to separate CH 4 /H 2 in the future. • ZIF-8/glycol–water slurry was experimentally effective for the separation of CH 4 /H 2 . • Use multi-stage pseudo-absorption model to simulate absorption–adsorption column. • Total energy consumption per unit volume of product is only 0.06254 kW·h/Nm 3 . • New process can produce hydrogen of 95 mol% with high hydrogen recovery of 97.94%." @default.
• W3197342175 created "2021-09-13" @default.
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• W3197342175 date "2021-09-01" @default.
• W3197342175 modified "2023-10-18" @default.
• W3197342175 title "A new energy efficient process for hydrogen purification using ZIF-8/glycol–water slurry: Experimental study and process modeling" @default.
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• W3197342175 doi "https://doi.org/10.1016/j.ijhydene.2021.06.210" @default.
• W3197342175 hasPublicationYear "2021" @default.
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