Steam recovery from flue gas by organosilica membranes for simultaneous harvesting of water and energy

Norihiro Moriyama, Akihiro Takeyama, Taichi Yamatoko, Ken-ichi Sawamura, Koji Gonoi, Hiroki Nagasawa, Masakoto Kanezashi and Toshinori Tsuru ()
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Norihiro Moriyama: Hiroshima University
Akihiro Takeyama: PLANTEC Inc.
Taichi Yamatoko: PLANTEC Inc.
Ken-ichi Sawamura: Keihanna Open Innovation Center
Koji Gonoi: Keihanna Open Innovation Center
Hiroki Nagasawa: Hiroshima University
Masakoto Kanezashi: Hiroshima University
Toshinori Tsuru: Hiroshima University

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Steam recovery from the spent gases from flues could be a key step in addressing the water shortage issue while additionally benefiting energy saving. Herein, we propose a system that uses organosilica membranes consisting of a developed layered structure to recover steam and latent heat from waste. Proof-of-concept testing is conducted in a running incinerator plant. The proposed system eliminates the need for a water supply while simultaneously recovering latent heat from the waste stream. First, the long-term stability of an organosilica membrane is confirmed over the course of six months on a laboratory-scale under a simulated waste stream. Second, steam recovery is demonstrated in a running waste incinerator plant (bench-scale), which confirms the steady operation of this steam recovery system with a steam recovery rate comparable to that recorded in the laboratory-scale test. Third, process simulation reveals that this system enables water-self-reliance with energy recovery that approximates 70% of waste combustion energy.

Date: 2023
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DOI: 10.1038/s41467-023-43546-y

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