Experimental and CFD study of H2S oxidation by activated carbon prepared from cotton pulp black liquor.

A porous carbon was synthesized from cotton black liquor. The carbon produced at the optimal condition was used for H 2 S oxidation at 423K at different experimental conditions. The H 2 S oxidation was modeled by a novel CFD approach by coupling the stoichiometric reaction with variation of porosity as the user-defined scalars (UDS). The established model can be a useful tool for studying the fluid dynamics of H 2 S oxidation by AC catalyst at experimental conditions in this work. • A porous carbon (AC) was synthesized from cotton black liquor. • The AC prepared under the optimal condition was applied to the direct H 2 S catalytic oxidation. • Complete parametrical computational fluid-dynamic (CFD) model was constructed. A porous activated carbon (AC) was synthesized from cotton black liquor, and the synthesis process was optimized using response surface method (RSM). The AC prepared under the optimal condition was applied to the direct H 2 S catalytic oxidation. Complete parametrical computational fluid-dynamic (CFD) model, coupling stoichiometric reaction with variation of porosity as the user-defined scalars (UDS), was developed to simulate the removal process. Various experiments, including breakthrough, pressure drops, and H 2 S conversion at different experimental conditions, were carried out. The CFD model was validated by results from the experiments, as the experiment results were found to adequately match model predictions. Hence, the model developed in this study can be a useful tool for studying the fluid dynamics of H 2 S oxidation by AC catalyst at investigated experimental conditions. [ABSTRACT FROM AUTHOR]