B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/04 (2006.01) B01J 23/20 (2006.01) B01J 37/02 (2006.01) C01B 3/06 (2006.01) C01B 13/02 (2006.01)
Patent
CA 2198777
There is disclosed a photocatalyst for the preparation of hydrogen consisting of a catalytically active ingredient cesium (Cs) impregnated in a support K4Nb6O17, represented by the formula (I): Cs(a)/K4Nb6O17, wherein a in parenthesis denotes the amout of the catalytically active ingredient Cs impregnated in the support K4Nb6O17 and has a value of 0.05 to 5.0 % by weight based on the total weight of the support. It is prepared by combining K2CO3 with Nb2O5 in a mole ratio of 2:3 of K2CO3:Nb2O5 sintering the combination at a temperature of about 1,200 to 1,300 ·C, to give K4Nb6O17, a support; and impregnating the support with a catalytically active inorganic ingredient Cs. Hydrogen is efficiently produced by illuminating an ultraviolet on an aqueous solution added with an oxygen-containing organic promoter at a reaction temperature of about 15 to 80 ·C under a reaction pressure of about 0.1 to 3 atm, in the presence of the photocatalyst.
Photocatalyseur de formule (I) servant à la préparation d'hydrogène comportant comme ingrédient actif un composé de césium imprégnant un support de K¿4?Nb¿6?O¿17?. Dans la formule (I), le (a) indique la quantité de Cs imprégnant le support de K¿4?Nb¿6?O¿17?, qui est comprise entre 0,05 et 5 % du poids total du support. Ledit catalyseur s'obtient en combinant le K¿2?CO¿3? et le Nb¿2?O¿5? dans un rapport molaire K¿2?CO¿3?/Nb¿2?O¿5? de 2/3, puis en frittant la combinaison à une température comprise entre environ 1200 et 1300 ~C pour obtenir le support de K¿4?Nb¿6?O¿17?, puis en imprégnant ledit support du composé minéral au césium. La production d'hydrogène s'obtient en éclairant à l'ultraviolet une solution aqueuse additionnée d'un promoteur organique contenant de l'oxygène à une température de réaction comprise entre environ 15 et 80 ~C et sous une pression de réaction comprise entre 0,1 et 3 atm en présence du photocatalyseur.
Chang Duck Rye
Chung Kyeong Hwan
Park Dae Chul
Borden Ladner Gervais Llp
Korea Research Institute Of Chemical Technology
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