CO2 Capture from the Tail Gas of Hydrogen Purification Unit by Vacuum Swing Adsorption Process, Using SAPO-34
| Autor: | Shohreh Fatemi, Javad Tamnanloo, Ayub Golmakani |
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| Rok vydání: | 2015 |
| Předmět: |
Steady state
Chemistry 020209 energy General Chemical Engineering Analytical chemistry Fractional factorial design 02 engineering and technology General Chemistry Kinetic energy Molecular sieve Vacuum swing adsorption Hydrogen purifier Industrial and Manufacturing Engineering Adsorption 0202 electrical engineering electronic engineering information engineering Space velocity |
| Zdroj: | Industrial & Engineering Chemistry Research. 55:334-350 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.5b02690 |
| Popis: | The idea of CO2 capture was proposed through a multistep vacuum swing adsorption (VSA) process from the tail gas of a hydrogen purification unit with the composition of H2, 25%; CO2, 55%; CH4, 17%; CO, 1%; and N2, 2 mol %, using a SAPO-34 molecular sieve. The experimental isotherms and dynamic breakthrough curves were obtained on the lab scale to estimate the equilibrium and kinetic parameters of the adsorption. The VSA process was designed and simulated on the basis of dynamic adsorption–desorption mass and energy balances in the gas and solid phases. Then, the purity of the desorbed CO2, the recovery of CO2, and the productivity of the process with energy consumption were determined at the cyclic steady state condition. The operational conditions such as weight-hourly space velocity (WHSV), feed pressure, vacuum pressure, and purge to feed ratio were investigated and optimized by the method of fractional factorial design to achieve 90% CO2 purity with more than 70% recovery. The simulation process was p... |
| Databáze: | OpenAIRE |
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