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Solar thermal swing adsorption on porous carbon monoliths for high-performance CO2 capture
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Solar thermal swing adsorption on porous carbon monoliths for high-performance CO2 capture
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Solar thermal swing adsorption on porous carbon monoliths for high-performance CO2 capture
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Journal Article
Solar thermal swing adsorption on porous carbon monoliths for high-performance CO2 capture
2023
Overview
Utilizing solar energy for sorbent regeneration during the CO
2
swing adsorption process could potentially reduce CO
2
capture costs. This study describes a new technique—solar thermal swing adsorption (STSA) for CO
2
capture based on application of intermittent illumination onto porous carbon monolith (PCM) sorbents during the CO
2
capture process. This allows CO
2
to be selectively adsorbed on the sorbents during the light-off periods and thereafter released during the light-on periods due to the solar thermal effect. The freestanding and mechanically strong PCMs have rich ultramicropores with narrow pore size distributions, displaying relatively high CO
2
adsorption capacity and high CO
2
/N
2
selectivity. Given the high CO
2
capture performance, high solar thermal conversion efficiency, and high thermal conductivity, the PCM sorbents could achieve high CO
2
capture rate of up to 0.226
kg
CO
2
⋅
kg
carbon
−
1
⋅
h
−
1
from a gas mixture of 20 vol.% CO
2
/80 vol.% N
2
under STSA conditions with a light intensity of 1000 W·m
−2
. In addition, the combination of STSA with the conventional vacuum swing adsorption technique further increases the CO
2
working capacity.
Publisher
Tsinghua University Press
