US 12,440,820 B2
Lime-based sorbent for use in a flue gas treatment installation and process of manufacturing said lime-based sorbent
Emanuelle Ligner, Villerot (BE); Thierry Chopin, Brussels (BE); and Marion Lorgouilloux, Strepy Bracquegnies (BE)
Assigned to S.A. Lhoist Recherche et Developpment, Ottignies-Louvain-la-Neuve (BE)
Appl. No. 17/760,522
Filed by S.A. Lhoist Recherche et Developpement, Ottignies-Louvain-la-neuve (BE)
PCT Filed Sep. 22, 2020, PCT No. PCT/EP2020/076442
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/058487, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 19199016 (EP), filed on Sep. 23, 2019.
Prior Publication US 2022/0347651 A1, Nov. 3, 2022
Int. Cl. B01J 20/04 (2006.01); B01J 20/24 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01)
CPC B01J 20/041 (2013.01) [B01J 20/24 (2013.01); B01J 20/267 (2013.01); B01J 20/28059 (2013.01); B01J 20/3021 (2013.01); B01J 20/3085 (2013.01); B01J 2220/46 (2013.01); B01J 2220/68 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A lime-based sorbent in powder form suitable for a circulating dry scrubber process and for numerous passing cycles through a CDS facility comprising:
at least 70 wt. % of Ca(OH)2 with respect to the total weight of said lime-based sorbent under a dry form after drying until constant weight at 150° C.,
at least 0.2 wt. % to at most 10 wt. % with respect to the total weight of said lime-based sorbent under a dry form after drying until constant weight at 150° C., of a first additive selected from the group consisting of hydrogels forming materials of natural or synthetic origin, superabsorbent polymers (SAPS) or cellulose ethers or a combination thereof,
having a BET specific surface area comprised of at least 3 m2/g, measured by manometry with adsorption of nitrogen after degassing in vacuum at 190° C. for at least 2 hours and calculated according to the multipoint BET method as described in the ISO 9277/2010E standard, and
having a total BJH pore volume of at least 0.01 cm3/g, determined by manometry with adsorption of nitrogen after degassing in vacuum at 190° C. for at least 2 hours and calculated according to the multipoint BJH method as described in the ISO 9277/2010E standard.
 
5. A method of use in a flue gas treatment process, comprising contacting the flue gas with the lime-based sorbent according to claim 1 in a circulating dry scrubber process or dry sorbent injection process.