Adsorption of CO2 by surface modified coal-based activated carbons: kinetic and thermodynamic analysis

• Autorzy: Xinzhe Liu , Mingyang Zhang , Juan Chen , Zhengyu Hu , Shuaifei Xian , Mingxuan Tang , Chenchen Zhang

Identyfikatory

DOI

10.2478/pjct-2022-0018

• Języki publikacji: EN

Abstrakty

EN

The effects of different surface modifiers on the CO₂ adsorption capacity of coal-based activated carbons were studied, and the diffusion behavior, adsorption kinetics and thermodynamic parameters of CO₂ in activated car-bons were analyzed. The results show that compared with ethylene glycol, 1,2-propylenediamine and zinc chloride, potassium hydroxide and sodium hydroxide can greatly improve CO₂ adsorption capacity. The adsorption rate is faster, and the adsorption capacity is larger, with the maximum CO₂ adsorption capacity being 33.54 mL/g. Fick’s law can well describe the diffusion behavior of CO₂ in activated carbon. The addition of a surface modifier can increase the diffusion coefficient. The diffusion of CO₂ in activated carbon falls into the category of crystal diffusion. The adsorption kinetics of CO₂ before and after surface modification follow the Bangham equation. During the adsorption process, δ H < 0, δ G < 0, δ S < 0. Surface modification can reduce adsorption heat and promote adsorption, and the adsorption process is dominated by physisorption.

Słowa kluczowe

EN

Surface modification; CO2 adsorption capacity; adsorption kinetics; thermodynamic parameters

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2022
• Tom: Vol. 24, nr 3
• Strony: 19--28
• Opis fizyczny: Bibliogr. 36 poz., rys., tab., wz.

Twórcy

autor

Xinzhe Liu

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

autor

Mingyang Zhang

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

autor

Juan Chen

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

autor

Zhengyu Hu

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

autor

Shuaifei Xian

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

autor

Mingxuan Tang

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

autor

Chenchen Zhang

• School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).