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1. (WO2018104445) COPPER SUPPORTED CATALYST COMPRISING A CA-DEFICIENT HYDROXYAPATITE FOR WASTE GAS NOX REMOVAL

Pub. No.:    WO/2018/104445    International Application No.:    PCT/EP2017/081819
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Fri Dec 08 00:59:59 CET 2017
IPC: B01J 37/30
B01J 23/00
B01J 23/02
B01J 23/72
B01J 35/10
Applicants: SOLVAY SA
Inventors: DELPLANCHE, Thierry
GERVASINI, Antonella
Title: COPPER SUPPORTED CATALYST COMPRISING A CA-DEFICIENT HYDROXYAPATITE FOR WASTE GAS NOX REMOVAL
Abstract:
A porous material comprises at least 60 wt % of a calcium-deficient hydroxyapatite having a Ca/P molar ratio of less than 1.67, having a specific BET surface area of at least 110 m2/g and a pore volume of at least 0.41 cm3/g, both measured after heat treatment at 120°C. A catalyst composition for catalytic reduction of NOx compounds, comprising an active catalyst component: Cu and/or CuO deposited on the porous material as support. A deNOx process according to which an ammonia source is injected into a combustion waste gas stream containing NOx; and to which the catalyst composition is brought into contact with the waste gas stream at a temperature of at least 100°C and preferably at most 600°C to carry out, in the presence of O2, a reduction by NH3 of at least a portion of the NOx.