Hydroxyl aluminium silicate clay for biohydrogen purification by pressure swing adsorption: Physical properties, adsorption isotherm, multicomponent breakthrough curve modelling, and cycle simulation

• Published in: International journal of hydrogen energy Vol. 43; no. 34; pp. 16573 - 16588
• Main Authors: Kuroda, Shohei, Nagaishi, Taira, Kameyama, Mitsuo, Koido, Kenji, Seo, Yuna, Dowaki, Kiyoshi
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 23.08.2018
• Subjects: Breakthrough curve; Carbon dioxide separation; HAS-Clay; Hydrogen purification; Pressure swing adsorption; Specific energy demand; HAS-Clay; Hydrogen purification; Carbon dioxide separation; Pressure swing adsorption; Breakthrough curve; Specific energy demand
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2018.07.065

Hydroxyl aluminium silicate clay (HAS-Clay) is a novel adsorbent in pressure swing adsorption for CO2 capture (CO2-PSA) and can also adsorb H2S. To investigate the performance of HAS-Clay as a CO2-PSA adsorbent, multicomponent breakthrough curves were determined using experimental measurements and theoretical models, and, based on those results, CO2-PSA simulations were conducted. The breakthrough curves produced from the theoretical models agreed well with those derived from experiment. CO2-PSA with HAS-Clay could purify biomass-gasification-derived producer gas of contaminants (carbon dioxide, methane, carbon monoxide, and hydrogen sulfide) with high CO2 recovery and low energy input. The CO2 recovery rate of CO2-PSA with HAS-Clay was 58.4%, and the CO2 purity was 98.4%. The specific energy demand was 2.83 MJ/kg-CO2. In addition, the H2S regenerability of HAS-Clay was investigated. The results show that HAS-Clay retained the ability to adsorb H2S at a steady-state value of 0.02 mol/kg for the regeneration cycles. Therefore, it is suggested that CO2-PSA with HAS-Clay is suitable for CO2 separation from multicomponent gas mixtures. [Display omitted] •Performance of HAS-Clay as CO2-PSA adsorbent is investigated.•Physical properties and adsorption isotherm of HAS-Clay are experimentally clarified.•Multicomponent breakthrough curves are observed, compared to theoretical models.•CO2-PSA with HAS-Clay were simulated using the theoretical models.•CO2 recovery rate, CO2 purity, and specific energy demand are revealed.