Abstract
In fluidized bed combustion of S-contg. fuels, adding limestone or dolomite to the bed is a widely applied method to control SO2 emissions. In this work, HCl and HF adsorption by Ca-based sorbents was studied in the lab. at different temps. from concns. inside the boiler furnace to those in the second pass (850-650°). The effect of temp., absorbent quality, and gas atm. on HCl and HF removal by Ca-sorbents was examd.; special emphasis was placed on studying the effect of molten-phase formation in HCl absorption. Expts. were conducted isothermally using a thermogravimetric app. specially designed to study solid-gas reactions. Two limestones and 1 dolomite absorbent were tested; the effect of gas compn. was examd. by varying CO2, water, and SO2 concns. in a simulated flue gas mixt. Absorbent conversions were calcd., and SEM- and energy dispersive spectrometry-observations were conducted to study the reaction pattern inside the absorbent particles. HF was very reactive, and conversions to CaF2 were close to 100%. CaCl2 was also formed at 650° and 850°, but the conversion was highly dependent on water and SO2 concns.
Original language | Undefined/Unknown |
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Title of host publication | Proceedings of the 16th international conference on fluidized bed combustion |
Editors | DW Geiling |
Publisher | American Society of Mechanical Engineers, ASME |
Pages | 194–204 |
ISBN (Print) | 9780791835234 |
Publication status | Published - 2001 |
MoE publication type | A4 Article in a conference publication |
Event | conference; 2001-05-13; 2001-05-16 - Reno, Nevada Duration: 13 May 2001 → 16 May 2001 |
Conference
Conference | conference; 2001-05-13; 2001-05-16 |
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Period | 13/05/01 → 16/05/01 |