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Data are presented on the solubility and diffusivity of nitrous oxide in equimolar potassium carbonate-potassium bicarbonate solutions at 25°C and 1 atm. The relationship between the viscosity of the solution and the diffusivity of N20 is obtained. Ways to estimate the solubility and diffusivity of carbon dioxide in the solutions from the data for N20 are indicated.

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The thermal deactivation in water of several poly(styrene-divinylbenzene-sulfonic acid) resins in the hydrogen-ion form has been measured in a fixed-bed flow reactor at temperatures between 420 and 480 K. The deactivation is caused by the removal of sulfonic acid groups from the polymer matrix, giving sulfuric acid. The removal of sulfonic acid groups is found to be catalyzed by hydrogen ions, which in the present case originate from the acid groups in the resin. Two types of -S03H groups are present in the resins, showing widely differing rates of decomposition. The reaction by which the more stable -S03H groups (about 90% of the initial resin capacity) decompose has an activation energy of approximately 120 kj/mol for most resins tested. The resin was the most stable resin tested at the highest temperatures in the range studied. In the lower range the resin Dowex HCR-W X8 is the most stable one.