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Received March 1, 2016
Accepted June 28, 2016
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Effects of alkali-metal carbonates and nitrates on the CO2 sorption and regeneration of MgO-based sorbents at intermediate temperatures
Soo Chool Lee
Su Ho Cha1
Yong Mok Kwon2
Myung Gon Park2
Byung Wook Hwang2
Yong Ki Park3
Hwi Min Seo3
Jae Chang Kim2†
Research Institute of Advanced Energy Technology, Kyungpook National University, Daegu 41566, Korea 1Research & Development Division Energy Plant R&D Team, Hyundai Engineering & Construction Co., Ltd., Yongin-si 16891, Korea 2Department of Chemical Engineering, Kyungpook National University, Daegu 41566, Korea 3Green Chemistry Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Korea
kjchang@knu.ac.kr
Korean Journal of Chemical Engineering, December 2016, 33(12), 3448-3455(8), 10.1007/s11814-016-0185-4
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Abstract
The effects of alkali-metal carbonates and nitrates on the CO2 sorption and regeneration of MgO-based sorbents were investigated in the presence of 10 vol% CO2 and 10 vol% H2O in an intermediate temperature range, 300 to 450 ℃. The CO2 capture capacities of the MgO-based sorbents promoted with Na2CO3 and K2CO3 were 9.7 and 45.0mg CO2/g sorbent, respectively. On the other hand, a MgO-based sorbent promoted with both Na2CO3 and NaNO3 exhibited the highest CO2 capture capacity of 97.4mg CO2/g sorbent at 200 oC in 10 vol% CO2, which was almost ten-times greater than that of the MgO-based sorbent promoted with Na2CO3. The CO2 sorption rate of these sorbents was higher than that of the MgO-based sorbents promoted with alkali-metal nitrates due to the formation of Na2Mg(CO3)2 or K2Mg(CO3)2 by the alkali-metal carbonate and the eutectic reaction of the alkali-metal nitrates. In addition, the reproducibility problem of double-salt sorbents obtained by the precipitation method was completely resolved by impregnating MgO with alkali-metal carbonates and nitrates. Furthermore, we found that their desorption temperatures are lower than those of the MgO-based sorbents promoted with alkali-metal carbonates due to the eutectic reaction during the regeneration process.
Keywords
References
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Kim K, Yang S, Lee JB, Eom TH, Ryu CK, Lee HJ, Bae TS, Lee YB, Lee SJ, Korean J. Chem. Eng., 32(4), 677 (2015)
Park YC, Jo SH, Ryu CK, Yi CK, Energy Procedia, 1(1), 1235 (2009)
Park YC, Jo SH, Lee SY, Moon JH, Ryu CK, Lee JB, Yi CK, Korean J. Chem. Eng., 33(1), 73 (2016)
Lee SC, Chae HJ, Lee SJ, Choi BY, Yi CK, Lee JB, Ryu CK, Kim JC, Environ. Sci. Technol., 42(8), 2736 (2008)
Arias B, Grasa G, Alonso M, Abanades JC, Energy Environ. Sci., 5(6), 7353 (2012)
Cui S, Cheng W, Shen X, Fan M, Russell A, Wu Z, Yi X, Energy Environ. Sci., 4, 2070 (2011)
Kwon SC, Fan M, Dacosta HFM, Russell AG, Tsouris C, J. Phys. Chem. A, 115(26), 7638 (2011)
Kim KW, Park YK, Park JH, Jung EJ, Seo HM, Kim HY, Lee KS, Energy Procedia, 63, 1151 (2014)
Lee SC, Choi BY, Lee TJ, Ryu CK, Soo YS, Kim JC, Catal. Today, 111(3-4), 385 (2006)
Lee SC, Chae HJ, Choi BY, Jung SY, Ryu CY, Park JJ, Baek JI, Ryu CK, Kim JC, Korean J. Chem. Eng., 28(2), 480 (2011)
Moon H, Yoo H, Seo H, Park YK, Cho HH, Energy, 84, 704 (2015)
Kim KW, Kim DW, Park YK, Lee KS, Int. J. Greenhouse Gas Control, 26, 135 (2014)
Park YK, Seo HM, Choi WC, Kang NY, Park SY, Min DY, Kim KW, Lee KS, Moon HK, Cho HH, Lee DK, Energy Procedia, 63, 2266 (2014)
Hassanzadeh A, Abbasian J, Fuel, 89(6), 1287 (2010)
Lee SY, Park SJ, J. Ind. Eng. Chem., 23, 1 (2015)
Xiao G, Singh R, Chaffee A, Webley P, Int. J. Greenhouse Gas Control, 5, 634 (2011)
Wang S, Yan S, Ma X, Gong J, Energy Environ. Sci., 4, 3805 (2011)
Vu AT, Park Y, Jeon PR, Lee CH, Chem. Eng. J., 258, 254 (2014)
Yang XF, Zhao LF, Xiao YH, Energy Fuels, 27(12), 7645 (2013)
Lee CH, Mun S, Lee KB, Chem. Eng. J., 258, 367 (2014)
Zhang K, Li XS, Duan Y, King DL, Singh P, Li L, Int. J. Greenhouse Gas Control, 12, 351 (2013)
Fagerlund F, Highfield J, Zevenhoven R, RSC Adv., 2, 10380 (2012)
Gregg SJ, Ramsay JD, J. Chem. Soc. A, 2784 (1970)
Beruto D, Botter R, Searcy AW, J. Phys. Chem., 91, 3578 (1987)
Philipp R, Fujimoto K, J. Phys. Chem., 96, 9035 (1992)
Harada T, Hatton TA, Chem. Mater., 27(23), 8153 (2015)
Mayorga SG, Weigel SJ, Gaffney TR, Brzozowski JR, US 6,280,503 B1 (2001).
Zhang K, Li XS, Li WZ, Rohatgi A, Adv. Mater. Interfaces, 1(3), 140003 (2014)
Zhang K, Li XS, Chen H, Singh P, King DL, J. Phys. Chem. C, 120(2), 1089 (2016)
Harada T, Simeon F, Hamad EZ, Hatton TA, Chem. Mater., 27(6), 1943 (2015)
Duan Y, Zhang K, Li XS, King DL, Li B, Zhao L, Xiao Y, Aerosol Air Qual. Res., 14, 470 (2014)
