Abstract
The focus of the study was on sorbents with a grain size of 125-250 μm. Examinations of reactivity were conducted in a reaction furnace under conditions required for reactivity testing of calcium sorbents. The tests were performed according to standard calcium sorbent tests (FW). Computation of reactivity indices and capacity index were performed according to formulae contained in previous publications [1]. The process of simultaneous calcination and sulfation of calcium sorbents is controlled by the speed of chemical processes and diffusion. Therefore, surface properties of sorbents, including porosity, play an important role in the flue gas desulphurization process. Examinations of sorbent porosity were performed using a mercury porosimeter. Based on porosimetric analysis, open porosity, the total surface area of sorbents and mean diameter of pores were evaluated for the sorbents studied.
Highlights
Calcium sorbents represent a broadly used group of materials for sulphur compounds capture in industrial installations for flue gas desulphurization
This study presents the effect of porosity of calcium sorbent, total surface area and size of pores on sorbent reactivity
Results of capacity index CI are consistent with those obtained for reactivity index, which results directly from (1) and (2), the lower the value of reactivity index, the higher the value of capacity index CI
Summary
Calcium sorbents represent a broadly used group of materials for sulphur compounds capture in industrial installations for flue gas desulphurization. In order to remove sulphur compounds, sorbents are introduced to the desulphurization system using wet, partially dry and dry methods [2]. The layer of calcium salt is obtained on the surfaces of sorbent grains, which might lead to the effect of pore clogging and, limitation of the places of active reactions of sulfation and slowing down of the process. It is typical of bigger sorbent grains that a non-reacted core of CaO and the external layer of CaSO4 around the core are formed [3,4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
