Title:
CO2 SEPARATION/RECOVERY METHOD AND CO2 SEPARATION/RECOVERY EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2019/073866
Kind Code:
A1
Abstract:
In systems that separate CO2 from a gas containing CO2 by using a solid-state adsorption material, the CO2 recovery rate and the purity of recovered CO2 are in a trade-off relationship, and enhancing the CO2 recovery rate while maintaining the CO2 purity is a problem. In the present invention, in order to recover CO2 remaining in a gap after desorbing CO2 from an adsorption material in a desorbing step, a gas is purged to force the remaining CO2 out when cooling (also serving as a purging step) and this gas is returned to be used in an adsorbing step, thus enhancing the CO2 recovery rate.
Inventors:
SASAKI TAKASHI (JP)
SUZUKI TOMOKO (JP)
SUZUKI TOMOKO (JP)
Application Number:
PCT/JP2018/036977
Publication Date:
April 18, 2019
Filing Date:
October 03, 2018
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
B01D53/62; B01D53/81; B01J20/06; B01J20/34; C01B32/50
Foreign References:
| JP2013061088A | 2013-04-04 | |||
| JP2013147386A | 2013-08-01 | |||
| KR20100135009A | 2010-12-24 | |||
| JP2013059703A | 2013-04-04 |
Attorney, Agent or Firm:
TODA Yuji (JP)
Download PDF: