Ye Nannan, Shen Yusi, Chen Yifeng, Cao Jian, Lu Xiaohua, Ji Xiaoyan
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
CAF, Key and Open Laboratory of Forest Chemical Engineering, Key Laboratory of Biomass Energy and Material, SFA, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Nanjing 210042, P. R. China.
Langmuir. 2024 Apr 30;40(17):9097-9107. doi: 10.1021/acs.langmuir.4c00466. Epub 2024 Apr 19.
The concurrent utilization of an adsorbent and absorbent for carbon dioxide (CO) adsorption with synergistic effects presents a promising technique for CO capture. Here, 1-butyl-3-methylimidazole acetate ([Bmim][Ac]), with a high affinity for CO, and the molecular sieve SAPO-34 were selected. The impregnation method was used to composite the hybrid samples of [Bmim][Ac]/SAPO-34, and the pore structure and surface property of prepared samples were characterized. The quantity and kinetics of the sorbed CO for loaded samples were measured using thermogravimetric analysis. The study revealed that SAPO-34 could retain its pristine structure after [Bmim][Ac] loading. The CO uptake of the loaded sample was 1.879 mmol g at 303 K and 1 bar, exhibiting a 20.6% rise compared to that of the pristine SAPO-34 recording 1.558 mmol g. The CO uptake kinetics of the loaded samples were also accelerated, and the apparent mass transfer resistance for CO sorption was significantly reduced by 11.2% compared with that of the pure [Bmim][Ac]. The differential scanning calorimetry method revealed that the loaded sample had a lower CO desorption heat than that of the pure [Bmim][Ac], and the CO desorption heat of the loaded samples was between 30.6 and 40.8 kJ mol. The samples exhibited good cyclic stability. This material displays great potential for CO capture applications, facilitating the reduction of greenhouse gas emissions.
同时利用具有协同效应的吸附剂和吸收剂来吸附二氧化碳（CO₂）是一种很有前景的CO₂捕集技术。在此，选择了对CO₂具有高亲和力的1-丁基-3-甲基咪唑乙酸盐（[Bmim][Ac]）和分子筛SAPO-34。采用浸渍法制备[Bmim][Ac]/SAPO-34混合样品，并对制备样品的孔结构和表面性质进行了表征。使用热重分析法测量负载样品吸附CO₂的量和动力学。研究表明，负载[Bmim][Ac]后，SAPO-34可保持其原始结构。负载样品在303 K和1 bar下的CO₂吸收量为1.879 mmol/g，与原始SAPO-34的1.558 mmol/g相比，增加了20.6%。负载样品的CO₂吸收动力学也加快，与纯[Bmim][Ac]相比，CO₂吸附的表观传质阻力显著降低了11.2%。差示扫描量热法表明，负载样品的CO₂解吸热低于纯[Bmim][Ac]，负载样品的CO₂解吸热在30.6至40.8 kJ/mol之间。样品表现出良好的循环稳定性。这种材料在CO₂捕集应用中显示出巨大潜力，有助于减少温室气体排放。
