Absorption of lean SO2 in aqueous solutions of Na2CO3 and desorption of CO2
1979; Elsevier BV; Volume: 18; Issue: 1 Linguagem: Inglês
10.1016/0300-9467(79)80022-2
ISSN1873-5541
AutoresEizô Sada, H. Kumazawa, Takashi Hoshino,
Tópico(s)Gas Sensing Nanomaterials and Sensors
ResumoThe absorption of lean SO2 in aqueous solutions of Na2CO3 was carried out using a stirred vessel with a plain gas—liquid interface and the rates of absorption of SO2 and desorption of CO2 accompanying the chemical absorption were measured. The process of SO2 absorption and CO2 desorption was analyzed in terms of a two-reaction-planes model which states that the reactant CO32− cannot coexist with the reaction product HSO3−. Observed absorption rates compared well with theoretical predictions, whereas the observed desorption rates from aqueous Na2CO3 solutions with higher concentrations had a tendency to decrease gradually with increasing enhancement factor, though calculated desorption rates should be independent of absorption rates under the present experimental conditions. The absolute values of the desorption rates, however, agreed reasonably well with theoretical values.
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