Composite oxide, metal-supporting material and ammonia synthesis catalyst

A technology of composite oxides and oxides, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, rare earth metal oxides/hydroxides, etc., and can solve problems such as insufficient ammonia yield

Active Publication Date: 2020-05-19
JAPAN SCI & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the method for producing ammonia in Patent Document 1, when ammonia is produced under relatively low pressure conditions, the yield of ammonia is insufficient.

Method used

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  • Composite oxide, metal-supporting material and ammonia synthesis catalyst
  • Composite oxide, metal-supporting material and ammonia synthesis catalyst
  • Composite oxide, metal-supporting material and ammonia synthesis catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0394] 0.5 La 0.5 o x _500℃ reduction>

[0395]

[0396] Ce 0.5 La 0.5 o x The composite oxide was synthesized as follows using the reverse homogeneous precipitation method. La(NO 3 ) 3 ·6H 2 O (Wako Pure Chemical Industries) is dissolved in purified water (Takasugi Pharmaceutical) to form La(NO 3 ) 3 aqueous solution. Ce(NO 3 ) 3 ·6H 2 O (Kanto Chemical) is dissolved in purified water to form Ce(NO 3 ) 3 aqueous solution. mixed La(NO 3 ) 3 Aqueous solution and Ce(NO 3 ) 3 As an aqueous solution, prepare 250 mL of a carrier precursor solution containing 0.0625 mol of La and Ce in total. 28% NH 3 250 mL of an aqueous solution (Wako Pure Chemical Industries, Ltd.) was added to a 1000 mL beaker, and the carrier precursor solution was added all at once while stirring at 320 rpm using a magnetic stirrer, and stirring was continued for 1 hour. Thereafter, it was left still for 30 minutes, 350 mL of the supernatant was removed, and 350 mL of ion-exchanged wate...

Embodiment 2

[0402] 0.5 La 0.5 o x _650℃ reduction>

[0403] Except that the holding temperature of the pretreatment in Example 1 was set to 650°C, the same operation as in Example 1 was carried out to obtain Ru / Ce 0.5 La 0.5 o x _650°C reduction.

Embodiment 3

[0405] 0.5 La 0.5 o x _800℃ reduction>

[0406] Except that the holding temperature of the pretreatment in Example 1 was set to 800°C, the same operation as in Example 1 was carried out to obtain Ru / Ce 0.5 La 0.5 o x _800 ℃ reduction.

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Abstract

The composite oxide according to the present invention is a composite oxide that contains metal elements and has a composition represented by general formula (1). AnXyMm (1) [wherein: A represents a lanthanoid characterized by being partly or entirely in the III valence state; X represents a group 2 element in the periodic table selected from the group consisting of Ca, Sr and Ba or a lanthanoid,provided that X is an element different from A; M represents a group 1 element in the periodic table, a group 2 element selected from the group consisting of Ca, Sr and Ba or a lanthanoid, provided that M is an element different from A and X; and n is more than 0 and less than 1, y is more than 0 and less than 1, and m is 0 or more and less than 1, provided that n+y+m is 1].

Description

technical field [0001] The present invention relates to a composite oxide that can be used for synthesizing ammonia under mild conditions, a metal support using the composite oxide, an ammonia synthesis catalyst, a method for producing the composite oxide, and a method for producing the metal support. Method and method for the manufacture of ammonia. Background technique [0002] Ammonia is an important raw material in the modern chemical industry. More than 80% of the ammonia produced is used as a chemical fertilizer for crops. In addition, ammonia is also attracting attention as a carrier of energy and hydrogen. This is due to: (1) its high hydrogen content (17.6wt%), (2) high energy density (12.8GJ / m 3 ), (3) Carbon dioxide will not be produced when decomposed to produce hydrogen. If ammonia can be efficiently produced from renewable energy sources such as solar energy and wind energy, it will be possible to reduce the global-scale problems related to energy and food ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/32B01J23/63C01C1/04C01F17/229C01F17/241
CPCB01J23/63C01C1/04C01F17/241C01F17/229C01F17/32Y02P20/52B01J23/10B01J23/462B01J23/75B01J37/04B01J37/088B01J37/16C01C1/0411C01G25/006C01P2002/01C01P2002/90
Inventor 永冈胜俊小仓优太佐藤胜俊
Owner JAPAN SCI & TECH CORP
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