| 摘要 |
Disclosed is a process for recovering pure CO2 from stack gases produced by the combustion of carbonaceous material. The process involves contacting the stack gas with porous sodium carbonate having a high surface area, i.e., greater than 0.3 m2/gm. at a temperature of from about 40 DEG to 75 DEG C. Interaction between moist CO2 and sodium carbonate forms 3NaHCO3.Na2CO3 which upon heating to a temperature of from 150 DEG to 250 DEG C. decomposes into CO2, H2O and Na2CO3. The liberated CO2 is readily recovered and the regenerated Na2CO3 can be used to recover additional CO2 thus permitting a cyclic process.
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