TY - JOUR
T1 - Characteristics of Na-Mg double salt for high-temperature CO2 sorption
AU - Lee, Chan Hyun
AU - Mun, Sungyong
AU - Lee, Ki Bong
N1 - Funding Information:
This research was supported by the Energy Efficiency and Resources R&D Program ( 2011201020004A ) and the Human Resources Development Program ( 20134010200600 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean Government’s Ministry of Trade, Industry and Energy . The authors also acknowledge the Korea Research Council of Fundamental Science and Technology (KRCF) for additional support through the National Agenda Program (NAP).
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - A novel high temperature CO2 sorbent, Na-Mg double salt, was prepared by a precipitation method. Thermogravimetric analysis was used to measure the thermal stability and to investigate the CO2 sorption behavior at high temperatures. The prepared Na-Mg double salt showed unique CO2 sorption characteristics in the temperature range of 300-500°C. A remarkably high CO2 sorption uptake of 3.48mol/kg (15.3wt%) was measured at 375°C and was maintained during repeated sorption/desorption cycles. Electronic microscopy and X-ray diffraction were used to determine the Na-Mg double salt morphology and structure, respectively. The elemental composition ratio in the Na-Mg double salt was characterized by inductively coupled plasma atomic emission spectroscopy and an elemental analysis. In situ X-ray diffraction analysis revealed that the CO2 sorption mechanism was based on the reaction of CO2 with MgO and Na2CO3 in the double salt to form Na2Mg(CO3)2. In addition to the high CO2 sorption uptake and good cyclic stability, the Na-Mg double salt showed exceptionally fast sorption and desorption.
AB - A novel high temperature CO2 sorbent, Na-Mg double salt, was prepared by a precipitation method. Thermogravimetric analysis was used to measure the thermal stability and to investigate the CO2 sorption behavior at high temperatures. The prepared Na-Mg double salt showed unique CO2 sorption characteristics in the temperature range of 300-500°C. A remarkably high CO2 sorption uptake of 3.48mol/kg (15.3wt%) was measured at 375°C and was maintained during repeated sorption/desorption cycles. Electronic microscopy and X-ray diffraction were used to determine the Na-Mg double salt morphology and structure, respectively. The elemental composition ratio in the Na-Mg double salt was characterized by inductively coupled plasma atomic emission spectroscopy and an elemental analysis. In situ X-ray diffraction analysis revealed that the CO2 sorption mechanism was based on the reaction of CO2 with MgO and Na2CO3 in the double salt to form Na2Mg(CO3)2. In addition to the high CO2 sorption uptake and good cyclic stability, the Na-Mg double salt showed exceptionally fast sorption and desorption.
KW - Carbon dioxide
KW - Double salt
KW - High temperature sorbent
KW - Sorption
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U2 - 10.1016/j.cej.2014.07.082
DO - 10.1016/j.cej.2014.07.082
M3 - Article
AN - SCOPUS:84906066648
SN - 1385-8947
VL - 258
SP - 367
EP - 373
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -