Modelling and thermodynamic properties of pure CO_(2)and fue gas sorption data on South African coals using Langmuir,Freundlich,Temkin,and extended Langmuir isotherm models

作     者：Major Mabuza Kasturie Premlall Michael O.Daramola Major Mabuza;Kasturie Premlall;Michael O.Daramola

作者机构：Department of Chemical EngineeringFaculty of Engineering and TechnologyVaal University of TechnologyP.O.Box 3595Secunda 2302South Africa Department of ChemicalMetallurgical and Materials EngineeringFaculty of Engineering and the Built EnvironmentTshwane University of TechnologyPrivate Bag X680Pretoria 0001South Africa Department of Chemical EngineeringFaculty of EngineeringBuilt Environment and Information TechnologyUniversity of PretoriaHatfeldPretoria 0028South Africa 

出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)

年 卷 期：2022年第9卷第3期

页      面：136-150页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Acknowledgements The authors acknowledge the National Research Foundation(NRF)of South Africa for the fnancial support provided to undertake this research successfully 

主　　题：Global warming Flue gas Adsorption Unmineable coal Adsorption models 

摘      要：Carbon sequestration in unmineable coal seams has been proposed as one of the most attractive technologies to mitigate carbon dioxide(CO_(2))emissions in which CO_(2)is stored in the microporous structure of the coal matrix in an adsorbed *** CO_(2)adsorption process is hence considered one of the more efective methodologies in environmental ***,adsorption isotherm measurements and modelling are key important scientifc measures required in understanding the adsorption system,mechanism,and process optimization in *** this paper,three renowned and reliable adsorption isotherm models were employed including Langmuir,Freundlich,and Temkin for pure CO_(2)adsorption data,and the extended-Langmuir model for multicomponent,such as fue gas mixture-adsorption data as investigated in this research ***,signifcant thermodynamics properties including the standard enthalpy change(ΔH°),entropy change(ΔS°),and Gibbs free energy(ΔG°)were assessed using the van’t Hof *** statistical evaluation of the goodness-of-ft was done using three(3)statistical data analysis methods including correlation coefcient(R^(2)),standard deviation(σ),and standard error(SE).The Langmuir isotherm model accurately represent the pure CO_(2)adsorption on the coals than Freundlich and *** extended Langmuir gives best experimental data ft for the fue *** thermodynamic evaluations revealed that CO_(2)adsorption on the South African coals is feasible,spontaneous,and exothermic;and the adsorption mechanism is a combined physical and chemical interaction between the adsorbate and the adsorbent.