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 - Conference Paper (Czech conference)
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]
R&D Projects: GA TA ČR TE02000236
Institutional support: RVO:67985858
Keywords : flue gas * NaHCO3 * air pollution residues
Subject RIV: CI - Industrial Chemistry, Chemical Engineering

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.
Permanent Link: http://hdl.handle.net/11104/0260596