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CO 2 Capture on a Novel Porous Silicate Material from Coal Gangue: Equilibrium, Kinetic, and Thermodynamic Studies
Author(s) -
Gao Yajun,
Du Hong,
Wu Yu,
Liu Kai,
Zhang Jianbin
Publication year - 2018
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11364
Subject(s) - physisorption , adsorption , enthalpy , desorption , silicate , exothermic reaction , thermodynamics , chemical engineering , materials science , kinetic energy , langmuir adsorption model , gangue , porosity , chemistry , organic chemistry , composite material , physics , quantum mechanics , engineering
The adsorption of CO 2 on a novel porous silicate material (PSM) from coal gangue at T = (288.15, 303.15, and 318.15) K was thoroughly characterized, and the experimental results showed that the adsorption capacity increased with the increasing pressures. Furthermore, the isotherm data were well fitted to Double–Langmuir model, and the adsorption process was found to be exothermic in nature with a decrease in entropy. Meanwhile, thermodynamic results also showed that the adsorption occurred via a spontaneous and enthalpy driven process and controlled by physisorption. In addition, the adsorption performance was still stable after 10 times adsorption—desorption cycles, which indicated that the PSM had a positive regeneration performance.