Use of Waste Materials to Augment Lime’s Reactivity towards Flue Gas Desulfurization

  • Paum Maina Moi University

Abstract

Four waste materials which are normally disposed off as landfill were recycled and put in good use as additives for improving limes reactivity towards flu gas desulphurization (FGD). Fly ash (coal power plant waste), bottom ash (coal power plant waste), waste activated sludge (waste water treatment plant waste) and iron waste (iron ore refining plant waste) improved limes reactivity by varying amount when tested in pH-stat and fixed bed apparatus which represent wet and dry FGD processes respectively. Increase in surface area of the sorbents produced from the blends of lime and these wastes was thought to be the main reason for improvement of reactivity, a conclusion confirmed by Brunauer, Emmett and Teller (BET) surface area analysis. Iron waste sorbents though,  had a different behavior probably because their reactive component was hematite rather than the pozzolanic materials.
Keywords: Land fills, Lime, Reactivity, Surface area, Waste materials
Published
Sep 26, 2017
How to Cite
MAINA, Paum. Use of Waste Materials to Augment Lime’s Reactivity towards Flue Gas Desulfurization. Proceedings of Sustainable Research and Innovation Conference, [S.l.], p. 140-149, sep. 2017. ISSN 2079-6226. Available at: <http://sri.jkuat.ac.ke/ojs/index.php/proceedings/article/view/591>. Date accessed: 24 feb. 2018.