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COMPOSITE OXIDE, METAL-SUPPORTING MATERIAL AND AMMONIA SYNTHESIS CATALYST

外国特許コード F190009820
整理番号 AF40-03WO
掲載日 2019年5月9日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP034515
国際公開番号 WO 2019059190
国際出願日 平成30年9月18日(2018.9.18)
国際公開日 平成31年3月28日(2019.3.28)
優先権データ
  • 特願2017-183215 (2017.9.25) JP
  • 特願2018-089516 (2018.5.7) JP
発明の名称 (英語) COMPOSITE OXIDE, METAL-SUPPORTING MATERIAL AND AMMONIA SYNTHESIS CATALYST
発明の概要(英語) 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].
従来技術、競合技術の概要(英語) BACKGROUND ART
Ammonia, in the chemical industry is an important raw material of the modern. 80% Or more of ammonia production, agricultural product for the production of chemical fertilizers are used. Further, ammonia, hydrogen energy garnered much attention as a carrier. Which is connected, (1) the content of hydrogen (17.6wt %), (2) high energy density (12.8GJ/m3), (3) when decomposed to produce hydrogen and carbon dioxide is generated from this. Renewable energy such as wind power or solar energy efficiently can be produced if the ammonia, the energy and food crisis associated with the global problem is mitigated.
Current, is used to produce ammonia Haber, the Bosch method, and a large consumption of energy, the amount thereof is about 1-2% of the world's energy consumption has been accounted for. In this method, is recovered and the energy consumption of about 60%, is secured as the enthalpy of the ammonia. However, the majority of the remainder of the energy, during the production of hydrogen from natural gas, ammonia synthesis, and are lost during the separation. Hard bar, Bosch ammonia synthesis method is a very high temperature and pressure (450°C>) and so on (20mpa>), a large amount of energy used in this method is highly demanded to reduce. Global energy consumption is suppressed, the Haber, the Bosch method used in a mild condition than the iron-based catalysts (lower temperatures and pressures) can be synthesized under ammonia catalyst is required.
In recent years, the order of 1mpa (10 atm) under low pressure conditions has been known a method of producing ammonia. Ruthenium catalyst is used in the production of ammonia, is generally supported on a carrier. For example, to Patent Document 1, ruthenium is supported on the carrier is used as the rare earth oxide, the amount of ruthenium can be reduced, and the reaction temperature can be lowered is disclosed. However, Patent Document 1 in the manufacturing method of the ammonia, the ammonia in the case of manufacturing the lower pressure conditions of the ammonia is not satisfactory in yield.
In addition to Patent Document 1, a variety of rare earth oxide carrier carrying the catalyst with ruthenium ammonia synthesis has been disclosed in various patents. As a typical example, JP-2-4, non-patent document 1 can be exemplified. Patent Document 2 and Patent Document 4 is a lanthanoid oxide, praseodymium oxide is disclosed in Patent Document 3, Non-Patent Document 1 is a Ce oxide, has been disclosed as a carrier. Is the non-patent document 2, Ru, Ce, La hydroxide coprecipitation, drying, was activated, Ru/CeO2-La2O3-based catalyst is disclosed.
Patent Document 1, 2, 4, including non-patent document 1 described in the literature is prior art, the ruthenium catalyst used in the synthesis of ammonia on the surface of carrier particles can be present as Ru is described. If present as particles, have an average diameter greater than 5nm of the report (see Non-Patent Document 2). In addition, in Patent Document 3, and Ru the Nest shell structure has been described.
A catalyst is generally in the higher activity is obtained. Is developed with respect to the ruthenium catalyst for ammonia synthesis, allow a higher yield of the high activity is continuously demanded.
In addition, the catalyst is loaded into the synthesis reactor used must be periodically replaced, easy handling thereof can also be obtained. With respect to the ruthenium catalyst for ammonia synthesis, it is possible to improve ease of handling are also a continuing need.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • 発明者(英語)
  • NAGAOKA Katsutoshi
  • OGURA Yuta
  • SATO Katsutoshi
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
参考情報 (研究プロジェクト等) CREST Creation of Innovative Core Technology for Manufacture and Use of Energy Carriers from Renewable Energy AREA
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