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Composite, method for producing composite, ammonia synthesis catalyst, and ammonia synthesis method

外国特許コード F180009417
整理番号 J1014-19WO
掲載日 2018年4月24日
出願国 アメリカ合衆国
出願番号 201515532877
公報番号 20170355607
出願日 平成27年12月4日(2015.12.4)
公報発行日 平成29年12月14日(2017.12.14)
国際出願番号 JP2015084207
国際公開番号 WO2016088896
国際出願日 平成27年12月4日(2015.12.4)
国際公開日 平成28年6月9日(2016.6.9)
優先権データ
  • 特願2014-246717 (2014.12.5) JP
  • 2015WO-JP84207 (2015.12.4) WO
発明の名称 (英語) Composite, method for producing composite, ammonia synthesis catalyst, and ammonia synthesis method
発明の概要(英語) (US20170355607)
An ammonia synthesis catalyst having high activity is obtained by having a two-dimensional electride compound having a lamellar crystal structure such as Ca2N support a transition metal.
However, since the two-dimensional electride compound is unstable, the stability of the catalyst is low.
In addition, in cases where a two-dimensional electride compound is used as a catalyst support, it is difficult to shape the catalyst depending on reactions since the two-dimensional electride compound has poor processability.
A composite which includes a transition metal, a support and a metal amide compound, wherein the support is a metal oxide or a carbonaceous support; and the metal amide compound is a metal amide compound represented by general formula (1).
M(NH2)x . . . (1) (In general formula (1), M represents at least one metal atom selected from the group consisting of Li, Na, K, Be, Mg, Ca, Sr, Ba and Eu; and x represents the valence of M.)
特許請求の範囲(英語) [claim1]
1. A composite, comprising a transition metal, a support, and a metal amide compound, wherein: the support is a metal oxide or a carbonaceous support;
the metal amide compound is a compound represented by formula (1);
M(NH2)x (1)
M represents at least one metal atom selected from the group consisting of Li, Na, K, Be, Mg, Ca, Sr, Ba and Eu; and
x represents the valence of M.
[claim2]
2. The composite according to claim 1, wherein the support is a basic, neutral, or weakly acidic metal oxide.
[claim3]
3. The composite according to claim 1, wherein the support is at least one metal oxide selected from the group consisting of ZrO2, TiO2, CeO2, Al2O3, Nb2O5, Ta2O5, and MgO.
[claim4]
4. The composite according to claim 1, wherein the composite has a BET specific surface area of 10 m2/g or more.
[claim5]
5. The composite according to claim 1, wherein the metal atom M is Ca.
[claim6]
6. The composite according to claim 1, wherein the transition metal is Ru.
[claim7]
7. A supported metal catalyst, comprising the composite according to claim 1.
[claim8]
8. An ammonia synthesis catalyst, comprising the composite according to claim 1.
[claim9]
9. A method of producing the composite according to claim 1, the method comprising: mixing a metal atom source comprising the metal atom M, the support, and liquid ammonia; and
reacting the metal atom source with the liquid ammonia to form a metal amide-supporting support comprising the metal amide compound on the support.
[claim10]
10. The method of producing a composite according to claim 9, further comprising: supporting as a transition metal raw material on the metal amide-supporting support; and
depositing the transition metal by thermally decomposing the transition metal raw material.
[claim11]
11. A method of synthesizing ammonia, the method comprising contacting a gas comprising nitrogen and a gas comprising hydrogen with the ammonia synthesis catalyst according to claim 8 to synthesize ammonia.
[claim12]
12. The method for synthesizing ammonia according to claim 11, wherein a temperature at which the ammonia synthesis catalyst is brought into contact with the ammonia synthesis catalyst is 100 deg. C. or more and 600 deg. C. or less.
[claim13]
13. The method for synthesizing ammonia according to claim 11, wherein the pressure when contacting the ammonia synthesis catalyst is 10 kPa or more and 20 MPa or less.
  • 発明者/出願人(英語)
  • HOSONO HIDEO
  • HARA MICHIKAZU
  • KITANO MASAAKI
  • YOKOYAMA TOSHIHARU
  • INOUE YASUNORI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • TOKYO INSTITUTE OF TECHNOLOGY
国際特許分類(IPC)
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