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CO 2 Adsorption Kinetics of K 2 CO 3 /Activated Carbon for Low‐Concentration CO 2 Removal from Confined Spaces
Author(s) -
Guo Yafei,
Zhao Chuanwen,
Li Changhai
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400383
Subject(s) - adsorption , sorption , activated carbon , chemistry , mass transfer , activation energy , kinetic energy , kinetics , carbon fibers , water vapor , analytical chemistry (journal) , thermodynamics , materials science , chromatography , organic chemistry , physics , quantum mechanics , composite number , composite material
K 2 CO 3 supported on activated carbon (K 2 CO 3 /AC) is a promising means to remove low‐concentration CO 2 from confined spaces. In this removal process, physical adsorption plays an important role but it is difficult to quantify the amount of CO 2 adsorbed when both H 2 O and CO 2 are present. The linear driving force mass transfer model is adopted to study the CO 2 adsorption kinetic characteristics of K 2 CO 3 /AC by analyzing the experimental data. The effect of K 2 CO 3 and H 2 O on the adsorption of CO 2 in K 2 CO 3 /AC was also evaluated. K 2 CO 3 loaded on the support is found to increase the mass transfer resistance but decrease the activation energy required for the physical adsorption process. The presence of water vapor is disadvantageous to achieve high physical adsorption capacity since it enhances the chemical sorption in the competitive dynamic sorption process.