Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
막증류 공정에서 소수성 막의 특성이 투과플럭스와 한계조업온도에 미치는 영향
The Influence of Characteristics of Hydrophobic Membrane on Flux and Upper Limit of Operating Temperature in Membrane Distillation Process
HWAHAK KONGHAK, December 1998, 36(6), 919-923(5), NONE
Download PDF
Abstract
본 연구에서는 공급부와 응축부의 온도변화 및 막의 특성에 따른 플럭스의 변화와 투과액의 전도도를 측정하여 막증류 공정의 전반적인 분리성능을 조사하였다. 공급액의 초기 조성은 3.5 wt% NaCl수용액을 사용하였으며 미세기공의 소수성막을 사용하였다. 조업온도 및 공급액의 조성변화에 무관하게 100% 가까운 배제율을 보였다. 막의 기공의 크기 및 표면 에너지는 한계조업범위(즉, 조업온도의 상한값)와 반비례한다. 투과플럭스나 투과액의 조성은 막의 재질 및 기공의 크기에 무관하다. 막하부의 공기층의 두께는 에너지 사용의 효율을 높이나 물질전달저항을 증가시키는 원인이 된다.
The effects of operating temperature and characteristics of membranes on the flux and the conductivity of permeate in membrane distillation were investigated. 3.5 wt% NaCl aqueous solution was used as a feed and hydrophobic microporous membranes were used. In spite of the variation of operating conditions, the NaCl was almost rejected. Both the pore size and the surface energy of membrane were inversely proportional to the range of operating conditions(i.e. upper limit of operating temperature). Both the flux and the permeate concentration were not affected by polymeric material and pore size of membranes. Although the air gap on the permeate side increases the efficiency of heat utilization, however, the mass transfer resistance also increases.
Keywords
References
Cho HW, Shin WC, Membr. J., 7, 57 (1997)
Lawson KW, Lloyd DR, J. Membr. Sci., 124(1), 1 (1997)
Calabro V, Drioli E, Matera F, Desalination, 83, 209 (1991)
Bandini S, Saavedra A, Sarti GC, AIChE J., 43(2), 398 (1997)
Banat FA, Simandl J, Chem. Eng. Sci., 51(8), 1257 (1996)
Lawson KW, Lloyd DR, J. Membr. Sci., 120(1), 111 (1996)
Rautenbach R, Albrecht R, "Membrane Processes," John Wiley & Sons (1989)
Calabro V, Pantano G, Kang M, Molinari R, Drioli E, Desalination, 78, 257 (1990)
Van Krevelen DW, "Properties of Polymers," Elsevier (1990)
Mulder M, "Basic Principles of Membrane Technology," Kluwer Academic Publishers (1991)
Schneider K, Holz W, Wollbeck R, J. Membr. Sci., 39, 25 (1988)
Schofield RW, Fane AG, Fell CJD, Macoun R, Desalination, 77, 279 (1990)
Lee DW, Hong WH, HWAHAK KONGHAK, 35(3), 344 (1997)
Kim SC, Lee DW, Hong WH, Korean J. Chem. Eng., 13(3), 275 (1996)
Lawson KW, Lloyd DR, J. Membr. Sci., 124(1), 1 (1997)
Calabro V, Drioli E, Matera F, Desalination, 83, 209 (1991)
Bandini S, Saavedra A, Sarti GC, AIChE J., 43(2), 398 (1997)
Banat FA, Simandl J, Chem. Eng. Sci., 51(8), 1257 (1996)
Lawson KW, Lloyd DR, J. Membr. Sci., 120(1), 111 (1996)
Rautenbach R, Albrecht R, "Membrane Processes," John Wiley & Sons (1989)
Calabro V, Pantano G, Kang M, Molinari R, Drioli E, Desalination, 78, 257 (1990)
Van Krevelen DW, "Properties of Polymers," Elsevier (1990)
Mulder M, "Basic Principles of Membrane Technology," Kluwer Academic Publishers (1991)
Schneider K, Holz W, Wollbeck R, J. Membr. Sci., 39, 25 (1988)
Schofield RW, Fane AG, Fell CJD, Macoun R, Desalination, 77, 279 (1990)
Lee DW, Hong WH, HWAHAK KONGHAK, 35(3), 344 (1997)
Kim SC, Lee DW, Hong WH, Korean J. Chem. Eng., 13(3), 275 (1996)
