US 11,679,381 B2
Methods for preparing high temperature water gas shifting catalyst, catalyst and process for reducing carbon monoxide
Roberto Carlos Pontes Bittencourt, Rio de Janeiro (BR)
Assigned to PETRÓLEO BRASILEIRO S.A.—PETROBRÁS, Rio De Janeiro (BR)
Filed by PETRÓLEO BRASILEIRO S.A.—PETROBRÁS, Rio de Janeiro (BR)
Filed on Oct. 7, 2021, as Appl. No. 17/496,459.
Claims priority of application No. 10 2020 020748 2 (BR), filed on Oct. 8, 2020.
Prior Publication US 2022/0111377 A1, Apr. 14, 2022
Int. Cl. B01J 37/02 (2006.01); B01J 23/80 (2006.01); B01J 6/00 (2006.01); C01B 3/16 (2006.01); B01J 21/04 (2006.01)
CPC B01J 37/0207 (2013.01) [B01J 6/001 (2013.01); B01J 23/80 (2013.01); B01J 37/0209 (2013.01); B01J 37/0236 (2013.01); C01B 3/16 (2013.01); B01J 21/04 (2013.01); C01B 2203/0283 (2013.01); C01B 2203/1076 (2013.01); C01B 2203/1082 (2013.01); C01B 2203/1614 (2013.01); C01B 2203/1628 (2013.01)] 12 Claims
OG exemplary drawing
 
1. Method for preparing a water gas shift reaction catalyst, free of iron or chromium, comprising:
a) Impregnating an alumina support with an aqueous solution of a potassium salt;
b) Drying the support to remove the solvent and calcine the alumina support at temperatures between 400° C. and 800° C. to obtain a potassium promoted alumina, preferably forming potassium aluminate species;
c) Impregnating the potassium promoted alumina with an aqueous polar solution containing a soluble zinc salt and a soluble copper salt;
d) Drying at a temperature between 80° C. and 120° C., and calcining the material at temperatures between 300° C. and 500° C., to obtain a catalyst consisting of alumina promoted with potassium and containing zinc and copper oxides;
e) Impregnating the material obtained in step (d) with an aqueous solution of a nickel salt, drying at a temperature between 80° C. and 120° C., optionally calcining between 350° C. to 450° C., to obtain a catalyst consisting of alumina promoted with potassium and containing zinc and copper oxides promoted by nickel.