Valorization of Calcium Carbonate-Based Solid Wastes for the Treatment of Hydrogen Sulfide from the Gas Phase
Résumé
This paper focuses on the valorization of calcium carbonate-based solid wastes for the
removal of hydrogen sulfide from gas phase. Two solid wastes taken from industrial sites for the
production of sodium carbonate and sodium bicarbonate by the Solvay process® were analyzed
by different physico-chemical methods. Calcium carbonate was found as the main component of
both the solid wastes. Trace amounts of other elements such as Mg, Al, Fe, Si, Cl, Na etc. werealso present in these wastes. These solid wastes showed higher sorption activity for the removal
of H2S, compared to a pure commercial calcium carbonate. The contact time was found as an
important parameter for the complete H2S uptake. The addition of well-dispersed iron-based
particles could be carried out by the standard incipient wetness impregnation method. Sorbent
containing 1 wt.% of spiked iron had the similar sorption behavior compared to a commercial
activated carbon, in terms of reactivity and reactivation possibility.
Domaines
Génie des procédés
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