Utilization of metal oxide-containing waste materials for hot coal gas desulfurization

• Published in: Fuel processing technology Vol. 70; no. 2; pp. 97 - 113
• Main Authors: Slimane, Rachid B, Abbasian, Javad
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2001; Elsevier Science
• Subjects: Air pollution caused by fuel industries; Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Hot gas desulfurization; Metal oxide waste; Pollution reduction; Regenerable sorbent; Stack gas and industrial effluent processing; Hot gas desulfurization; Metal oxide waste; Regenerable sorbent; Inorganic adsorbate; Desulfurization; Air pollution control; Transition metal Compounds; Hydrogen sulfide; Gas solid adsorption; Regeneration; Manganese oxides; Tin oxide; Zinc oxide; Coal gas; Copper oxide; Chemical reactivity
• ISSN: 0378-3820; 1873-7188
• DOI: 10.1016/S0378-3820(00)00148-X

Four metal oxide waste materials from metal processing operations and one coal bottom ash sample were procured and their reactivities toward hydrogen sulfide (H 2S) were evaluated in the temperature range of 400°C to 600°C. A low-cost sorbent pelletization/granulation technique was applied to produce preliminary sorbent formulations in the form of attrition-resistant granules that were also evaluated. The results indicate that sorbents based on an iron oxide waste material, in the as-received as well as processed form, were the most reactive and exhibited the highest effective capacities for sulfur. The regeneration of these sorbents could be carried out over a relatively moderate temperature range, suggesting that the iron oxide waste material might be a viable candidate for the development of low-cost regenerable sorbents for H 2S removal from hot coal gases under conditions of current practical interest.