Title:
MIXED GAS SEPARATION METHOD AND MIXED GAS SEPARATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/149318
Kind Code:
A1
Abstract:
This mixed gas separation method comprises: the step of supplying a mixed gas having a CO2 concentration of 30% by volume or lower and containing at least N2, H2, and CO2, to a first separation membrane (310) which is selectively permeable to H2, to separate the mixed gas into a first permeated gas and a first non-permeated gas; the step of supplying the first non-permeated gas to a second separation membrane (320) which is selectively permeable to CO2, to separate the first non-permeated gas into a second permeated gas and a second non-permeated gas; and the step of supplying the second non-permeated gas to a CO2 recovery unit (33) which, via a separation method other than a membrane separation method, separates and recovers CO2, to recover the CO2 present in the second non-permeated gas. The CO2 concentration in the first non-permeated gas is higher by at least 5% by volume than the CO2 concentration in the mixed gas. The N2 concentration in the second non-permeated gas is 50% by volume or higher. The H2 concentration in the second non-permeated gas is 30% by volume or lower. Accordingly, CO2 can be separated efficiently from a mixed gas containing a low concentration of CO2.
Inventors:
NODA KENICHI (JP)
Application Number:
PCT/JP2021/036739
Publication Date:
July 14, 2022
Filing Date:
October 05, 2021
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
B01D53/22; B01D53/14; B01D71/02; B01J19/00; C01B3/56; C01B32/55
Foreign References:
| JP2008247632A | 2008-10-16 | |||
| JPS63151332A | 1988-06-23 | |||
| JP2013503807A | 2013-02-04 |
Other References:
FRANZ, J. ; SCHERER, V.: "An evaluation of CO"2 and H"2 selective polymeric membranes for CO"2 separation in IGCC processes", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER BV, NL, vol. 359, no. 1-2, 1 September 2010 (2010-09-01), NL , pages 173 - 183, XP027093199, ISSN: 0376-7388
LIN HAIQING, HE ZHENJIE, SUN ZHEN, KNIEP JAY, NG ALVIN, BAKER RICHARD W., MERKEL TIMOTHY C.: "CO2-selective membranes for hydrogen production and CO2 capture – Part II: Techno-economic analysis", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER BV, NL, vol. 493, 1 November 2015 (2015-11-01), NL , pages 794 - 806, XP055949686, ISSN: 0376-7388, DOI: 10.1016/j.memsci.2015.02.042
KALDIS S.P., SKODRAS G., SAKELLAROPOULOS G.P.: "Energy and capital cost analysis of CO2 capture in coal IGCC processes via gas separation membranes", FUEL PROCESSING TECHNOLOGY, ELSEVIER BV, NL, vol. 85, no. 5, 1 April 2004 (2004-04-01), NL , pages 337 - 346, XP055949687, ISSN: 0378-3820, DOI: 10.1016/S0378-3820(03)00204-2
LIN HAIQING, HE ZHENJIE, SUN ZHEN, KNIEP JAY, NG ALVIN, BAKER RICHARD W., MERKEL TIMOTHY C.: "CO2-selective membranes for hydrogen production and CO2 capture – Part II: Techno-economic analysis", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER BV, NL, vol. 493, 1 November 2015 (2015-11-01), NL , pages 794 - 806, XP055949686, ISSN: 0376-7388, DOI: 10.1016/j.memsci.2015.02.042
KALDIS S.P., SKODRAS G., SAKELLAROPOULOS G.P.: "Energy and capital cost analysis of CO2 capture in coal IGCC processes via gas separation membranes", FUEL PROCESSING TECHNOLOGY, ELSEVIER BV, NL, vol. 85, no. 5, 1 April 2004 (2004-04-01), NL , pages 337 - 346, XP055949687, ISSN: 0378-3820, DOI: 10.1016/S0378-3820(03)00204-2
Attorney, Agent or Firm:
MATSUSAKA, Masahiro et al. (JP)
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