Abstract Mesoporous molecular sieves SBA-15 with four pore structures were loaded with an ionic liquid [P66614][Triz] to adsorb CO2 from raw biohythane. The hybrid sorbents of SBA-15 loaded with [P66614][Triz] were characterized by using N2 adsorption analyzer, thermogravimetric analyzer, scanning electron microscopy, and high-resolution transmission electron microscopy. The molecular sieve SBA-15 (with the most probable pore size of 4.3 nm) loaded with 50% ionic liquid (IL), which was called SBA-15 (4.3) − 50% IL, exhibited the fastest CO2 absorption rate and the shortest equilibrium time, which was approximately one-third of the equilibrium times of the other three hybrid sorbents. An intraparticle diffusion model was used to clarify that SBA-15 (4.3) − 50% IL (with the shortest pore length of 120 nm) executed a two-stage CO2 absorption process, which reduced the CO2 absorption time. The rate constant kI in the first stage of the CO2 absorption of SBA-15 (4.3) − 50% IL was approximately four times as much as those of the other three hybrid sorbents because the cross-section area of its total pores was approximately three times higher than those of the other three hybrid sorbents. Results showed that pore length had significant effect on CO2 absorption performance.

中文翻译：

---

CO 2 在离子液体中的吸收和扩散 [P 66614 ][Triz] 具有各种孔径的改性分子筛 SBA-15

摘要 具有四个孔结构的介孔分子筛 SBA-15 负载离子液体 [P66614][Triz] 以从原始生物乙烷中吸附 CO2。通过使用 N2 吸附分析仪、热重分析仪、扫描电子显微镜和高分辨率透射电子显微镜对负载 [P66614][Triz] 的 SBA-15 混合吸附剂进行了表征。载有 50% 离子液体 (IL) 的分子筛 SBA-15（最可能的孔径为 4.3 nm），称为 SBA-15 (4.3) - 50% IL，表现出最快的 CO2 吸收速率和最短的平衡时间，大约是其他三种混合吸附剂的平衡时间的三分之一。颗粒内扩散模型用于阐明 SBA-15 (4.3) - 50% IL（最短孔长为 120 nm）执行两阶段 CO2 吸收过程，从而减少了 CO2 吸收时间。SBA-15 (4.3) - 50% IL 的 CO2 吸收第一阶段的速率常数 kI 约为其他三种混合吸附剂的四倍，因为其总孔的横截面积约为 3比其他三种混合吸附剂高出数倍。结果表明，孔长对CO2吸收性能有显着影响。