M.A. Butt

Single gas absorption with reaction in a slurry containing fine particles

Abstract Two models are presented for the absorption process with a finite rate of reaction in a slurry containing fine particles. These are extensions of Ramac As an experimental verification of two proposed models, experiments with carbon dioxide or sulfur dioxide were performed into a slurry containing fine

Absorption of carbon dioxide into aqueous solutions of ethylenediamine: Effect of interfacial turbulence

Abstract Absorption rates for carbon dioxide into aqueous ethylenediamine solutions were measured in a laminar liquid jet, a wetted-wall column and a quiescent liquid absorber to investigate the chemical absorption mechanism and the reaction kinetics over a wide range of contact times. From the chemical absorption data in the laminar liquid jet with surface-active agent, the value of the rate constant for the second order reaction was derived as 1.75 × 104 l mol−1 s−1. Additional experiments were carried out on the tracer desorption of ethylene from aqueous ethylenediamine solutions saturated with ethylene to check and verify effects due to interfacial turbulence. We conclude that the Marangoni effect cannot be neglected even for such a short contact time as that in a laminar liquid jet.

Chemical absorption into a finite slurry

Abstract Film theory of gas absorption with an instantaneous reaction into an aqueous slurry solution was extended to the case of a finite slurry. The theory was applied to the experiments on the absorption of dilute sulfur dioxide into magnesium hydroxide slurry in a self-induced spray scrubber.

Simultaneous absorption with reaction in a slurry containing fine particles

Abstract The simultaneous absorption of two gases accompanied by chemical reaction into a slurry of fine suspended particles was numerically analysed using the model obtained with some extension of the corresponding single gas absorption. Experiments were performed for the simultaneous absorption of sulfur dioxide and carbon dioxide with a plane gas—liquid type stirred tank absorber. The experimental results were satisfactorily elucidated by the proposed model and it is suggested that when accompanied by sulfur dioxide absorption, carbon dioxide may almost be regarded as an inert gas.