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US 2018/0327272 A1Published application
Supported metal material, supported metal catalyst, and ammonia synthesis method using the same
AssigneesJapan Science and Technology Agency, Tokyo Institute of Technology
InventorsHideo HOSONO, Michikazu HARA, Masaaki KITANO, Hiroshi MIZOGUCHI, Toshiharu YOKOYAMA, Kyosuke YAMAGATA
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Abstract
The present invention provides a supported metal catalyst, a method for synthesizing ammonia using said catalyst, and a supported metal material in which a transition metal is supported on a support, wherein the support is a metal hydride represented by general formula (1): XHn . . . (1); and in general formula (1), X represents at least one selected from the group consisting of atoms from Groups 2 and 3, and lanthanoid atoms, and n is in a range of 2<n<3.
Claims10
1:
- A supported metal material comprising:
- a transition metal, and
- a support loading the transition metal,
- wherein the support is a metal hydride represented by the following general formula (1):
- XHn (1)
- where in the general formula (1), X represents at least one atom selected from the group consisting of atoms from Groups 2 and 3 of the periodic table and lanthanoid atoms, and n is in a range of 2≤n≤3.
3 more elements
2:
- The supported metal material according to claim 1,
- wherein in the general formula (1), X is at least one atom selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y and lanthanoid.
3:
- The supported metal material according to claim 1, wherein the transition metal is at least one selected from the group consisting of Ru, Co, and Fe.
4:
- The supported metal material according to claim 1, wherein a loading amount of the transition metal with respect to the support is 0.01% to 30 mass %.
5:
- A supported metal catalyst, which is the supported metal material according to claim 1.
6:
- A method of producing ammonia, comprising:
- synthesizing ammonia by bringing a raw material gas containing hydrogen and nitrogen into contact with the supported metal catalyst according to claim 5.
7:
- The method of producing ammonia according to claim 6, wherein a reaction temperature when bringing the raw material gas into contact with the supported metal catalyst is from 100° C. to 600° C.
8:
- The method of producing ammonia according to claim 6, wherein a reaction pressure when bringing the raw material gas into contact with the supported metal catalyst is from 10 kPa to 20 MPa.
9:
- The method of producing ammonia according to claim 6, wherein a water content of the raw material gas is 100 ppm or less.
10:
- The method of producing ammonia according to claim 6, wherein a volume ratio of hydrogen to nitrogen (H2/N2 (volume/volume)) when bringing the raw material gas into contact with the supported metal catalyst is 0.4 or more.