Catalyst for catalytic oxidative cracking of hydrogen sulphide with concurrent hydrogen production
Disclosed is a catalyst suitable for the catalytic oxidative cracking of a H 2 S-containing gas stream. The catalyst comprises at least one or more active metals selected from the group consisting of iron, cobalt, and nickel, supported by a carrier comprising ceria and alumina. The active metal is preferably in the form of its sulphide. Also disclosed is a method for the production of hydrogen from a H 2 S-containing gas stream, comprising subjecting the gas stream to catalytic oxidative cracking so as to form H 2 and S 2 , using a catalyst in accordance with any one of the composition claims.
1 . A catalyst suitable for the production of hydrogen from a H 2 S-containing gas stream by catalytic oxidative cracking, the catalyst comprising a carrier and nickel as the sole catalytically active metal, wherein said active metal is in the form of its sulfide, wherein said active metal is supported by said carrier and wherein said carrier comprises ceria and alumina, wherein the active metal in its sulfide form is present in the catalyst in a range from 1-40 wt %; wherein the concentrations are expressed based on the total weight of catalyst when the catalyst is present as a powder; and wherein the concentrations are expressed based on the total weight of a catalytic layer when the catalyst comprises a mechanical substrate.
2 . The catalyst according to claim 1 , wherein the active metal in its sulfide form is present in the catalyst in a range from 3-35 wt %.
3 . The catalyst according to claim 1 , wherein the support comprises ceria and alumina in a weight ratio for ceria to total ceria and alumina
(
i
.
e
.
weight
of
ceria
weight
of
ceria
+
weight
of
alumina
×
100
%
)
of 2% to 50%.
4 . The catalyst according to claim 3 , wherein the support comprises ceria and alumina in a weight ratio for ceria to total ceria and alumina of 5% to 40%.
5 . The catalyst according to claim 4 , wherein the support comprises ceria and alumina in a weight ratio for ceria to total ceria and alumina of 10% to 30%.
6 . A catalyst comprising a carrier and at least one active metal,
wherein the at least one active metal is selected from the group consisting of iron, cobalt, nickel, and combinations thereof;
wherein the active metal is in the form of its sulfide;
wherein the active metal in its sulfide form is present in the catalyst in a range from 8 to 25 wt %, wherein the concentrations are expressed based on the total weight of the catalyst when the catalyst is present as a powder, and wherein the concentrations are expressed based on the total weight of the catalytic layer when the catalyst comprises a mechanical substrate;
wherein the support comprises ceria and alumina, in a weight ratio for ceria to total ceria and alumina
(
i
.
e
.
weight
of
ceria
weight
of
ceria
+
weight
of
alumina
×
100
%
)
of 10% to 30%.