Comparison of Ca(OH)2 and NaHCO3 as Sorbents Suitable for Dry Flue Gas Treatment at Temperatures Below 250 °C.

0460552 - ÚCHP 2017 CZ eng K - Konferenční příspěvek (tuzemská konf.)
Zach, Boleslav
Comparison of Ca(OH)2 and NaHCO3 as Sorbents Suitable for Dry Flue Gas Treatment at Temperatures Below 250 °C.
Proceedings of abstracts. Prague: Institute of Chemical Process Fundamentals of the CAS, v. v. i., 2016 - (Bendová, M.; Wagner, Z.), s. 24-25. ISBN 978-80-86186-82-5.
[Bažant Postgraduate Conference 2016. Prague (CZ), 06.06.2016]
Grant CEP: GA TA ČR TE02000236
Institucionální podpora: RVO:67985858
Klíčová slova: flue gas * NaHCO3 * air pollution residues
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

The sorption rate of HCl on Ca(OH)2 is, in comparison with NaHCO3 (Na2CO3), an order of magnitude lower and to reach the emission limits, the flue gas treatment has to be conducted under suitable conditions. A suitable temperature for removal of acidic gases by calcium based sorbents is connected to the content of H2O in flue gas. The reaction rate is very good in the vicinity of dew point but the process conditions shouldn’t be too close to the dew point to avoid condensation. The advantages of Ca(OH)2 are better reactivity towards HF, very low water solubility of air pollution residues, and low price in comparison with NaHCO3.
Trvalý link: http://hdl.handle.net/11104/0260596