Hydroxyl aluminium silicate clay for biohydrogen purification by pressure swing adsorption: Physical properties, adsorption isotherm, multicomponent breakthrough curve modelling, and cycle simulation
Hydroxyl aluminium silicate clay for biohydrogen purification by pressure swing adsorption: Physical properties, adsorption isotherm, multicomponent breakthrough curve modelling, and cycle simulation
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DOI：
10.1016/j.ijhydene.2018.07.065
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发表时间：
2018-08
影响因子：
7.2
通讯作者：
Shohei Kuroda;Taira Nagaishi;Mitsuo Kameyama;K. Koido;Yuna Seo;K. Dowaki
中科院分区：
文献类型：
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作者：
Shohei Kuroda;Taira Nagaishi;Mitsuo Kameyama;K. Koido;Yuna Seo;K. Dowaki
羟基硅酸铝粘土（HAS-Clay）是一种新型的变压吸附捕集CO2（CO2-PSA）的吸附剂，同时也能吸附H2S。为了研究HAS-粘土作为CO2-PSA吸附剂的性能，使用实验测量和理论模型确定多组分穿透曲线，并且基于这些结果，进行CO2-PSA模拟。由理论模型得到的穿透曲线与实验结果吻合较好。HAS-Clay吸附CO2-PSA技术可以在低能耗、高CO2回收率的条件下净化生物质气化产生的煤气中的污染物（二氧化碳、甲烷、一氧化碳和硫化氢）。HAS-Clay吸附CO2-PSA的CO2回收率为58.4%，CO2纯度为98.4%。比能量需求为2.83 MJ/kg-CO2。此外，HAS-粘土的H2S再生性能进行了研究。结果表明，HAS-Clay在再生循环中保持了在0.02 mol/kg的稳态值下吸附H2S的能力。因此，HAS-Clay吸附CO2-PSA适用于多组分混合气体中CO2的分离。
Hydroxyl aluminium silicate clay (HAS-Clay) is a novel adsorbent in pressure swing adsorption for CO2capture (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 CO2recovery and low energy input. The CO2recovery rate of CO2-PSA with HAS-Clay was 58.4%, and the CO2purity 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 CO2separation from multicomponent gas mixtures.