Is the liquefaction of CO2 by air separation feasible?
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If CO2 at 2.5 MPa is already available (considered high-purity with no impurities), can it be partially liquefied by using an expansion machine and heat exchangers in a liquefaction setup? Given that the gas-liquid region is narrow, how can we ensure that solidification does not occur during heat exchange? Experts, please share your insights.
The cooling capacity for liquefying carbon dioxide is mainly provided by ammonia refrigeration units~~
It is mainly for anti-freezing; in the expansion zone, it is necessary to consider using a heat exchange medium for ice melting.
Just consider the temperature at which the expander is used for heat exchange. I haven’t come into contact with this; it’s just my personal understanding.
Use a chiller directly. . . . .