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Adsorption equilibrium and kinetics of CO2 on mesocellular foams modified HKUST-1: Experiment and simulation
Journal of CO2 Utilization ( IF 7.7 ) Pub Date : 2020-12-29 , DOI: 10.1016/j.jcou.2020.101415
Haihong Zhao , Ning Zhao , Qin Wang , Feng Li , Feng Wang , Subing Fan , Ekaterina V. Matus , Zinfer R. Ismagilov , Lei Li , Fukui Xiao

In this work, a series of HK/MCFs-x sorbents consisting of metal organic framework (HKUST-1) and mesocellular foams (MCFs) were prepared using solvothermal method. The samples were characterized by various techniques including XRD, N2 adsorption/desorption, TG, SEM, FT-IR, and water vapor adsorption, respectively. The CO2 adsorption isotherms and adsorption kinetic curves at different temperatures were obtained. Results showed that the Langmuir-Freundlich model and pseudo-first-order equation could be used to describe the CO2 adsorption isotherms and kinetic curves, thus proving the exothermic, multilayer, physical adsorption processes. The isosteric heats of adsorption of the pure HKUST-1 and HK/MCFs-1 were in the range of 19–26 KJ/mol. The mass-transfer coefficient increased along with the temperature. The adsorption activation energies of the pure HKUST-1 and HK/MCFs-1 were 4.150 and 4.203 KJ/mol, respectively. Compared with the pure HKUST-1, HK/MCFs-1 had a substantially equivalent amount of CO2 adsorption capacity under the same conditions, while the water resistance was improved. The CO2 mass-transfer rate was higher than the pure HKUST-1. Meanwhile, HK/MCFs-1 also showed better recyclability.



中文翻译:

改性HKUST-1介孔泡沫对CO 2的吸附平衡和动力学:实验与模拟

在这项工作中,采用溶剂热法制备了由金属有机骨架(HKUST-1)和中孔泡沫(MCFs)组成的一系列HK / MCFs-x吸附剂。通过各种技术对样品进行表征,分别包括XRD,N 2吸附/解吸,TG,SEM,FT-IR和水蒸气吸附。获得了不同温度下的CO 2吸附等温线和吸附动力学曲线。结果表明,Langmuir-Freundlich模型和伪一阶方程可用于描述CO 2吸附等温线和动力学曲线,从而证明了放热的多层物理吸附过程。纯的HKUST-1和HK / MCFs-1的吸附等构热范围为19-26 KJ / mol。传质系数随温度增加而增加。纯的HKUST-1和HK / MCFs-1的吸附活化能分别为4.150和4.203 KJ / mol。与纯HKUST-1相比,HK / MCFs-1在相同条件下的CO 2吸附量基本相等,而耐水性得到改善。CO 2的传质速率高于纯HKUST-1。同时,HK / MCFs-1也显示出更好的可回收性。

更新日期:2020-12-29
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