K2CO3/homopiperazine 수용액의 이산화탄소 흡수 특성 연구

김영은; 남성찬; 이용택; 윤여일; Young Eun Kim; Sung Chan Nam; Youngtaek Lee; Yeo Il Yoon

Applied Chemistry for Engineering, Vol.21, No.3, 284-290, June, 2010

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K2CO3/homopiperazine 수용액의 이산화탄소 흡수 특성 연구

Study of CO2 Absorption Characteristics in Aqueous K2CO3 Solution with Homopiperazine

김영은, 남성찬 , 이용택 ¹, 윤여일 ^†

한국에너지기술연구원 온실가스연구단
¹충남대학교 공과대학 바이오응용화학부

Young Eun Kim, Sung Chan Nam , Youngtaek Lee¹, and Yeo Il Yoon^†

Greenhouse Gas Research Center, Korea Institute of Energy Research, Daejeon 305-343, Korea
¹Department of Bio-Applied Chemistry, Chungnam National University, Daejeon 305-764, Korea

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초록

본 연구에서는 이산화탄소 포집 기술에 적용할 수 있는 흡수제인 K2CO3와 homopiperazine (homoPZ)을 이용한 혼합수용액을 사용하여 이산화탄소 흡수 특성을 연구하였다. 기액 흡수평형(VLE) 장치를 사용하여 60, 80 ℃에서 이산화탄소 평형분압(PCO2*)과 압력변화를 측정하였고, 40, 60, 80 ℃에서 반회분식(semi-batch) 흡수 장치를 사용하여 흡수능을 평가하였다. K2CO3 수용액의 결정 생성 문제 개선과 CO2 흡수량 및 흡수속도 증대를 위해 고리형 diamine인 homoPZ를 증진제로 사용하였으며, 기존 연구된 MEA, K2CO3와 K2CO3/piperazine (PZ)과의 성능을 비교 평가하였다. 실험결과 homoPZ를 첨가하였을 경우 K2CO3 수용액보다 이산화탄소 평형분압이 낮아져 흡수능이 개선되었으며, 흡수속도는 60 ℃에서 약 0.375배, 80 ℃에서 약 0.343배 향상되었다. K2CO3/homoPZ 수용액의 CO2 loading capacity는 60 ℃에서 K2CO3/PZ 수용액과 유사하였고, MEA 수용액보다는 우수하였다.

In this study, as one of the carbon dioxide (CO2) adsorbents the aqueous potassium carbonate (K2CO3)/promoter mixtures were investigated. Equilibrium partial pressure (PCO2*) and pressure change were measured by using VLE (Vapor-liquid equilibrium) equipment in the mixture solution at 60 and 80 ℃, respectively. Absorption capacity was estimated in the semi-batch absorption apparatus at 40, 60 and 80 ℃. We proposed to use homopiperazine (homoPZ), cyclic diamine compound as a promoter of K2CO3 solution, to prevent crystalline formation and increase absorption capacity of aqueous K2CO3 solution. The absorption capacity of K2CO3/homoPZ was compared with MEA, K2CO3 and K2CO3/piperazine (PZ). Based on the results, we found that the mixture solution containing homoPZ had lower equilibrium partial pressure than that of K2CO3 solution and the absorption rate was approximately 0.375-times faster at 60 ℃, 0.343-times faster at 80 ℃ than that of aqueous K2CO3 solution without homoPZ. K2CO3/homoPZ solution showed excellent CO2 loading capacity compared with MEA solution at 60 ℃.

Keywords:potassium carbonate;piperazine;homopiperazine;CO2 absorption

[References]

Charkvarti S, Gupta A, Hunek B, First National Conference on Carbon Sequestration, Washington, DC, May 15-17 (2001)
UNFCCC Report for Greenhouse Gases Emission Statistics, Korea Energy Economics Institute (2001)
Seo DJ, Ph.D. Dissertation, Korea Institute of Science and Technology, Korea (2000)
Astarita G, Chem. Eng. Sci., 16, 202 (1961)
Astarita G, Savage DW, Bisio A, John Wiley & Sons, New York (1983)
Goff GS, Ph.D. Dissertarion, The University of Texas at Austin, Austin, TX (2005)
Alawode AO, Ph.M. Dissertation, The University of Texas at Austin, Austin, TX (2005)
Apple M, Wagner U, Henrici HJ, Voldamer K, Fuerst E, U. S. Patent 4,336,233 (1982)
Xu GW, Zhang CF, Qin SJ, Wang YW, Ind. Eng. Chem. Res., 31, 921 (1992)
Jang WJ, Yoon YI, Park SD, Rhee YW, Baek IH, J. Korean Ind. Eng. Chem., 19(6), 645 (2008)
Benson HE, Field JH, Jimeson RM, Chem. Eng. Prog., 50, 356 (1954)
Benson HE, Field JH, Haynes WP, Chem. Eng. Prog., 52, 433 (1956)
Tosh JS, Field JH, Benson HE, Haynes WP, U. S. Bureau of Mines Report of Investigation, 5484, 23 (1959)
Savage DW, Sartori G, Faraday Discuss. Chem. Soc., 77, 17 (1984)
Tseng PC, Ho WS, Savage DW, AIChE. J., 34, 922 (1988)
Bosch H, Versteeg GF, Swaaij VWPM, Chem. Eng. Sci., 44, 2735 (1989)
Cullinane JT, Rochelle GT, Chem. Eng. Sci., 59(17), 3619 (2004)
Cullinane JT, Ph.D. Dissertation, The University of Texas at Austin, Austin, TX (2005)
Astarita G, Savage DW, Longo JM, Chem. Eng. Sci., 36, 581 (1981)

[Referenced By]

[Related Articles]

[1] Charkvarti S, Gupta A, Hunek B, First National Conference on Carbon Sequestration, Washington, DC, May 15-17 (2001)

[2] UNFCCC Report for Greenhouse Gases Emission Statistics, Korea Energy Economics Institute (2001)

[3] Seo DJ, Ph.D. Dissertation, Korea Institute of Science and Technology, Korea (2000)

[4] Astarita G, Chem. Eng. Sci., 16, 202 (1961)

[5] Astarita G, Savage DW, Bisio A, John Wiley & Sons, New York (1983)

[6] Goff GS, Ph.D. Dissertarion, The University of Texas at Austin, Austin, TX (2005)

[7] Alawode AO, Ph.M. Dissertation, The University of Texas at Austin, Austin, TX (2005)

[8] Apple M, Wagner U, Henrici HJ, Voldamer K, Fuerst E, U. S. Patent 4,336,233 (1982)

[9] Xu GW, Zhang CF, Qin SJ, Wang YW, Ind. Eng. Chem. Res., 31, 921 (1992)

[10] Jang WJ, Yoon YI, Park SD, Rhee YW, Baek IH, J. Korean Ind. Eng. Chem., 19(6), 645 (2008)

[11] Benson HE, Field JH, Jimeson RM, Chem. Eng. Prog., 50, 356 (1954)

[12] Benson HE, Field JH, Haynes WP, Chem. Eng. Prog., 52, 433 (1956)

[13] Tosh JS, Field JH, Benson HE, Haynes WP, U. S. Bureau of Mines Report of Investigation, 5484, 23 (1959)

[14] Savage DW, Sartori G, Faraday Discuss. Chem. Soc., 77, 17 (1984)

[15] Tseng PC, Ho WS, Savage DW, AIChE. J., 34, 922 (1988)

[16] Bosch H, Versteeg GF, Swaaij VWPM, Chem. Eng. Sci., 44, 2735 (1989)

[17] Cullinane JT, Rochelle GT, Chem. Eng. Sci., 59(17), 3619 (2004)

[18] Cullinane JT, Ph.D. Dissertation, The University of Texas at Austin, Austin, TX (2005)

[19] Astarita G, Savage DW, Longo JM, Chem. Eng. Sci., 36, 581 (1981)