	US 11,806,695 B2
	Method for the photocatalytic reduction of CO₂using a microporous crystalline metal sulfide photocatalyst
Antoine Fecant, Rueil-Malmaison (FR); Raquel Martinez Franco, Rueil-Malmaison (FR); Gerhard Pirngruber, Rueil-Malmaison (FR); and Philibert Leflaive, Rueil-Malmaison (FR)
Assigned to IFP Energies Nouvelles, Rueil-Malmaison (FR)
Appl. No. 17/622,886
Filed by IFP Energies Nouvelles, Rueil-Malmaison (FR)
PCT Filed Jun. 16, 2020, PCT No. PCT/EP2020/066568 § 371(c)(1), (2) Date Dec. 27, 2021, PCT Pub. No. WO2020/260064, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 1907102 (FR), filed on Jun. 28, 2019.
Prior Publication US 2022/0226802 A1, Jul. 21, 2022
Int. Cl. B01J 27/04 (2006.01); C01B 32/40 (2017.01); B01D 53/00 (2006.01); B01D 53/86 (2006.01); B01J 31/02 (2006.01); B01J 35/00 (2006.01); C07C 1/02 (2006.01)

CPC B01J 27/04 (2013.01) [B01D 53/007 (2013.01); B01D 53/8671 (2013.01); B01J 31/0237 (2013.01); B01J 35/004 (2013.01); C01B 32/40 (2017.08); C07C 1/02 (2013.01); B01D 2255/2094 (2013.01); B01D 2255/20792 (2013.01); B01D 2255/802 (2013.01); B01D 2255/9205 (2013.01); B01D 2257/504 (2013.01); C07C 2523/06 (2013.01); C07C 2523/14 (2013.01); C07C 2527/04 (2013.01); C07C 2531/02 (2013.01)]

16 Claims

1. A process for the photocatalytic reduction of carbon dioxide carried out in the liquid phase and/or in the gas phase, said process comprising:

a) bringing a charge containing carbon dioxide and at least one sacrificial compound into contact with a photocatalyst comprising at least one semiconductor based on microporous crystalline metal sulfide; and

b) irradiating the photocatalyst by at least one irradiation source producing at least one wavelength which is lower than the bandgap width of said photocatalyst, said irradiating being carried out at a temperature of between −10° C. and 200° C. and at a pressure of between 0.01 MPa and 70 MPa;

wherein said photocatalyst is provided in the form of a solid comprising a chemical composition expressed on an anhydrous basis, in terms of moles, by the following formula:

X_aY_bS₈:cR

where:

X represents at least one tetravalent element selected from Sn, Ge, Ti, and Zr,

Y represents at least one divalent metal selected from Zn, Cd, and Ni,

R represents at least one nitrogenous organic entity,

S is sulfur,

“a” is the molar amount of X and is between 0.1 and 5;

“b” is the molar amount of Y and is between 0.2 and 8;

“c” is the molar amount of the nitrogenous organic entity R and is between 0 and 4.