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Title:
METHOD FOR MANUFACTURING PURIFIED GAS, METHOD FOR MANUFACTURING DRY ICE, DEVICE FOR MANUFACTURING PURIFIED GAS, AND DEVICE FOR MANUFACTURING DRY ICE
Document Type and Number:
WIPO Patent Application WO/2023/037854
Kind Code:
A1
Abstract:
This method for manufacturing purified gas including carbon dioxide gas comprises: a first concentration step for generating an intermediate gas having a higher concentration of carbon dioxide gas than a target gas, which includes carbon dioxide gas, by vacuum regeneration pressure swing adsorption that uses a first adsorption tower that adsorbs carbon dioxide gas from the target gas; and a second concentration step for generating the purified gas, which has an even higher concentration of carbon dioxide gas than the intermediate gas, by membrane separation or vacuum regeneration pressure swing adsorption that uses a second adsorption tower that adsorbs carbon dioxide gas from the intermediate gas.

Inventors:
NISHII NANAKO (JP)
KANEKO MASAYUKI (JP)
YAMANO MEGUMI (JP)
GOHDA LEONA (JP)
KAIGAWA TAKANORI (JP)
Application Number:
PCT/JP2022/031509
Publication Date:
March 16, 2023
Filing Date:
August 22, 2022
Export Citation:
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Assignee:
AIR WATER INC (JP)
International Classes:
C01B32/50; B01D53/04; C01B32/55; F25J1/00; F25J3/08
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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