Dynamic simulation study of direct air capture reactor with internal heat source
The signing of the Paris Agreement and the establishment of Carbon Pea-king and Carbon Neutrality goals have put forward stricter requirements for China's car-bon emissions.CO2 direct air capture technology (DAC)is a promising carbon negative e-mission technology.Analogous to the dehumidification heat exchanger structure in the field of adsorption refrigeration,improvements have been made to the core components of adsorption DAC technology.Propose a reactor with an internal heat source and conduct model research on it.Obtain the time and spatial distribution of temperature and adsorp-tion parameters through calculation.When the ambient temperature is 25 ℃ and the tem-perature of the cold and heat sources is 15 ℃ and 80 ℃ respectively,the seventh cycle en-ters the stable stage.As the cycle progresses,the temperature rapidly responds to the temperature of the heat transfer fluid,exhibiting alternating high and low values.The ad-sorption capacity shows a serrated upward trend.In terms of spatial distribution,the tem-perature difference at each position inside the reactor at the end of adsorption and desorp-tion shall not exceed 10 ℃.The maximum temperature difference within a single layer is around 1 ℃ (4th layer).The difference in adsorption was less than 0.01 mmol/g (4th lay-er),the adsorbent functioned uniformly in the reactor.Overall,it exhibits uniform and efficient heat and mass transfer performance,which can be combined with different adsor-bents and fluid media as needed for various DAC scenarios.
CO2 capturereactoradsorptiondesorptiongreenhouse gas
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