고순도 수소제조를 위한 PSA 공정에서 활성탄 충전길이 효과

백은규; 최민호; 서성섭

Clean Technology, Vol.7, No.2, 127-132, June, 2001

Export Citation

고순도 수소제조를 위한 PSA 공정에서 활성탄 충전길이 효과

Effects of activated carbon packing length in PSA process for production of high-purity hydrogen

백은규, 최민호, 서성섭

초록

수소 등 다성분 혼합가스로부터 고순도의 수소를 얻기 위한 PSA 조업에 있어서 흡착탑 내 활성탄 층 충전길이의 효과를 연구하였다. 기-고상 간 물질전달은 LDF 식을 사용하였고 각 조성물질의 비선형 흡착등온선으로 변형 Langmuir 식을 사용하였다. 각각 다른 흡착성능을 가진 활성탄과 제올라이트 2개의 흡착제를 한 개의 흡착탑 내에 연속 충전시킨 결과 제품의 순도와 회수율 면에서 흡착제의 충전길이 비가 매우 중요하였다. 120 cm인 흡착탑 내 최적의 활성탄 층 길이는 CO2 농도가 최종 제거되는 부위로 결정되는데 이 때 제품의 최고 순도를 나타내는 지점이 65 cm였다.

The effects of activated-carbon (AC) packing length on the Pressure Swing Adsorption (PSA) performance was investigated for the hydrogen separation from the multicomponent mixture gas. Linear driving force model was used to describe mass transfer between two phase and coupled Langmuir isotherm was used for each component as a nonlinear adsorption isotherm. When two adsorbents with a different adsorption capacity were packed consecutively in one bed, it is very important to determine the packing ratio of zeolite to activated carbon affecting the purity and recovery of the product. The activated carbon packing length in adsorption tower of 120 cm was determinated by the ending point of CO2 contration. The optimum length of an activated carbon layer was 65 cm for production of high-purity hydrogen.

Keywords:PSA;Hydrogen Separation Adsorption;Activated carbon

[References]

Ruthven DM, Farooq S, Knaebel KS, "Pressure Swing Adsorption," VCH Publishers (1994)
Yang RT, "Gas Separation by Adsorption Process," Butterworths, Boston (1987)
Batta LB, U.S. Patent, 3,564,816 (1971)
Malek A, Farooq S, AIChE J., 43(10), 2509 (1997)
Shin H, "Mathematical Simulation of Pressure Swing Adsorption Cycle with Pressure Equalization, Fundamentals of Adsorption (edited by Levan, M.F.)," Proceedings of 5th International Conference on the Fundamentals of Adsorption, 829 (1996)
Jang DK, M.S. Thesis, Hongik Univ., Seoul, Korea (1999)
Villadsen V, Michelsen M, "Solution of Differential Equation Models by Polynomial Approximation," Prentice-Hall, Englewood Cliffs, N.J. (1978)
IMSL Library User's Manual, IMSL Inc. Houston Texas (1984)
Yang JY, Lee CH, AIChE J., 44(6), 1325 (1998)

[1] Ruthven DM, Farooq S, Knaebel KS, "Pressure Swing Adsorption," VCH Publishers (1994)

[2] Yang RT, "Gas Separation by Adsorption Process," Butterworths, Boston (1987)

[3] Batta LB, U.S. Patent, 3,564,816 (1971)

[4] Malek A, Farooq S, AIChE J., 43(10), 2509 (1997)

[5] Shin H, "Mathematical Simulation of Pressure Swing Adsorption Cycle with Pressure Equalization, Fundamentals of Adsorption (edited by Levan, M.F.)," Proceedings of 5th International Conference on the Fundamentals of Adsorption, 829 (1996)

[6] Jang DK, M.S. Thesis, Hongik Univ., Seoul, Korea (1999)

[7] Villadsen V, Michelsen M, "Solution of Differential Equation Models by Polynomial Approximation," Prentice-Hall, Englewood Cliffs, N.J. (1978)

[8] IMSL Library User's Manual, IMSL Inc. Houston Texas (1984)

[9] Yang JY, Lee CH, AIChE J., 44(6), 1325 (1998)