Measurement of mass Transfer Coefficients for Adsorptive Bulk Gas Separation with Velocity Variations

기체속도가 변하는 벌크기체의 흡착공정에서 물질전달계수의 측정

  • Min, Jun-Ho (Hyundai Industrial Research Institute, Hyundai Heavy Industries) ;
  • Choi, Min-Ho (Department of Chemical Engineering, Hongik University) ;
  • Suh, Sung-Sup (Department of Chemical Engineering, Hongik University)
  • 민준호 (현대중공업 산업기술연구소) ;
  • 최민호 (홍익대학교 공과대학 화학공학과) ;
  • 서성섭 (홍익대학교 공과대학 화학공학과)
  • Received : 1998.10.24
  • Accepted : 1998.12.21
  • Published : 1999.04.10

Abstract

The concentration breakthrough curves were examined to predict mass transfer coefficients of nitrogen and oxygen in adsorption column for design data of PSA process. Experimental breakthrough curves for bulk gas flow were compared with theoretical simulation results. For quantitative analysis of the adsorption, coupled Langmuir isotherm was considered and LDF model was used to describe the mass transfer effect. In the experimental and theoretical results, it was found that mass transfer coefficient was not affected by flow rate but strongly affected by pressure. As a result of this tendency, mass transfer resistance in this system was proved to belong to the macropore diffusion controlling region and the mass transfer coefficients could be expressed by exponential functions of pressure change. The mass transfer coefficients for one component, nitrogen or oxygen, were successfully applied to breakthrough curves for bulk mixed gases. The experimental curves were reasonably in consistent with the theoretical curves and the error time was less than 5 percent.

Keywords

Mass Transfer;Nitrogen;Oxygen;Adsorption Column;Pressure-swing Adsorption;Bulk Flow

Acknowledgement

Supported by : 한국학술진흥재단

References

  1. Principles of Adsorption and Adsorption Processes D. M. Ruthven
  2. Transport Phenomena R. B. Bird;W. E. Stewart;E. N. Lightfoot
  3. PhD Thesis, 한국과학기술원 $PSA 공정을 이용한 H_2/CO_2, H_2/CO 혼합가스의 분리 및 고정층 흡착팀에서의 동특성에 관한 연구$ 한국과학기술원
  4. Chem. Eng. Sci. v.44 S. S. Suh;P. C. Wankat
  5. Chem. Eng. Sci. v.45 S. Farooq;D. M. Ruthven
  6. Pressure Swing Adsorption D. M. Ruthven;S. Farooq;K. S. Knaebel
  7. Chem. Eng. Sci. v.45 S. Farooq;D. M. Ruthven
  8. Adsorption Engineering M. Suzuki
  9. J. of Korean Ind. & Eng. Chemistry v.6 박경찬;서성섭
  10. Gas Separation by Adsorption Processes R. T. Yang