• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Hydrogen is generated by contacting an alkaline aqueous solution of formaldehyde with at least one catalyst selected from the group consisting of molybdenum, tungsten, molybdenum carbides, tungsten carbides, molybdenum nitrides, tungstenum borides, copper, silver, gold and compounds of copper, silver and gold Hydrogen can be generated at ambient temperature under atmospheric pressure and, therefore, complicated steps or complicated devices are unnecessary.
    公开号:SU1190981A3
    申请号:SU823393026
    申请日:1982-02-17
    公开日:1985-11-07
    发明作者:Окамото Хироси；Кудо Тетсуйити；Кавамура Го
    申请人:Хитачи Лтд (Фирма)；
    IPC主号:
    专利说明:

    co o ko
    00 The invention relates to processes for producing hydrogen by decomposing hydrogen-containing substances. A known method for producing hydrogen is by decomposing water when it comes into contact with aluminum, taken as a powder or in an alkaline medium at-40-100 ° C lj. The disadvantage of this method is the increased process temperature, which causes high energy costs for the process. The purpose of the invention is to reduce the temperature of the process. The goal is achieved by a method of producing hydrogen by decomposing a hydrogen-containing compound in an alkaline medium, according to which a hydrogen solution of an aldehyde form is taken and the process is carried out in the presence of a catalyst selected from the group: molybdenum, tungsten or their carbides, molybdenum nitride, tungsten boride or their mixtures. - The method allows to reduce the temperature of the process of hydrogen production from 90-100 to 10-45 ° C, which leads to a significant (2-5 times) reduction of energy consumption. It was established that the production of hydrogen is possible if the alkaline aqueous solution of formaldehyde is subjected to contact with a suitable catalyst at ambient temperature under atmospheric pressure. It is assumed that the reaction proceeds according to the following scheme: CLEAR + HgO HCOOH + H., (1) it is clear + conifer + n, (2) According to the proposed method, the catalyst plays the main role. If the catalyst is not consumed or consumed is unsuitable, the above reaction does not occur and no hydrogen is obtained. Molybdenum, tungsten, molybdenum carbides, tungsten carbides, molybdenum nitrides, and tungsten borides can be used as formaldehyde-contact catalysts for the production of hydrogen. Formaldehyde is used in the form of its aqueous solution. It is necessary that the aqueous solution is alkaline. If it is neutral or acidic, the amount of hydrogen produced is extremely small or no hydrogen is obtained at all. If KOH is used as an alkali, then the rate of hydrogen production is significantly increased, not less than 0.3 mol / l KOH. Not only KOH can be used, but also various other inorganic alkalis, such as, for example, NaOH. When using NaOH, the effect can be achieved with at least 0.3 mol / l NaOH. The above alkalis can be used in the form of their saturated solution. For example, you can use a solution of KOH at a concentration of up to about 14 mol / L and a solution of NaOH at a concentration of up to 19 mol / L. Chemical reactions depend largely on temperature. It is well known that the reaction rate almost doubles if the temperature is raised by 10 ° C. Table 1 shows the temperature at which the rate of hydrogen production increases. Table 1 Hydrogen production rate, ml / min (at normal temperature and pressure) 1.5 3.0 Note. KOH 2 mol / l, HNO 2 mol / l, WC 1 g, amount of solution 120 ml. Example 1. Powder WC, MojCo or CHCO) C (particle diameter 1 | qm) was added as a catalyst to an aqueous solution of KOH containing 2 mol / L formaldehyde. The rate of hydrogen production is measured at. The result of & t shows that WC is the most effective and most excellent catalyst for producing hydrogen. 1.5 CM / min. 1 g catalysis WjC Ho g s (WMo) C Table 2 Mo-C rate, g hydrogen production, ml / min, Hydrogen production rate c. - the presence of 1 g of WC as a catalyst and at 18 C approximately 1.5 ml / min. The rate of production in the presence of 1 kg of WC at 50 ° C is 15 l / m, which corresponds to 1 m / h (normal temperature and pressure). The amount of hydrogen obtained from 1 l of a solution containing 2 mol / l of HCHO and 2 mol / l of KOH is 45 l. Example 2. The rate of hydrogen production by gram is measured analogously to example 1 in order to achieve the result 0.001 119098 1 Example 3. The rate of hydrogen production in the presence of tungsten boride is measured analogously to example 1 0.01, g 0.02 0, 003. the implementation of the proposed method. Molybdenum boride cannot be consumed, since it is soluble in an alkaline solution. Example 4. The rate of production of hydrogen in the presence of a catalyst of molybdenum or tungsten in the form of a catalyst is measured, as in Example 1, Mo 0.003 cm / min. W 0.003 - Example. 5. The rate of hydrogen production in the presence of various mixtures of WC and as catalysts in different ratios is measured as in Example 1. The results are presented in Table 2. As can be seen from Table 2, even when the catalysts are used in the form of a mixture, their catalyzing properties do not deteriorate, and the corresponding catalytic properties break off. Hydrogen can be obtained by simply accepting the decomposition of formaldehyde, which is carried out with minimal energy consumption and simple instrumentation.
    权利要求:
    Claims (1)
    [1]
    METHOD FOR PRODUCING HYDROGEN by decomposition of a hydrogen-containing compound in an alkaline medium, which consists in the fact that, in order to reduce the temperature of the process, an aqueous solution of formaldehyde is taken as a hydrogen-containing compound, and the process is carried out in the presence of a catalyst selected from the group: molybdenum, tungsten or their carbides, molybdenum nitride, tungsten boride or · mixtures thereof.
    §
    SP i90981
    1 1190981
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    同族专利:
    公开号 | 公开日
    DE3260803D1|1984-10-31|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2414120A|1944-05-17|1947-01-14|Cola G Parker|Production of vanillyl alcohol|
    US3216801A|1962-06-01|1965-11-09|Universal Oil Prod Co|Process for producing hydrogen|
    US3965252A|1973-01-20|1976-06-22|Ashland Oil, Inc.|Hydrogen production|
    JPS5710093B2|1973-02-03|1982-02-24|
    CA1107298A|1978-01-23|1981-08-18|Norman A. Nielsen|Methanol oxidation/dehydrogenation over silver-gold alloy|US4851206A|1981-07-15|1989-07-25|The Board Of Trustees Of The Leland Stanford Junior University, Stanford University|Methods and compostions involving high specific surface area carbides and nitrides|
    FR2543152B1|1983-03-25|1985-06-14|Eurotungstene Poudres|REFORMING CATALYSTS BASED ON TUNGSTENE AND / OR MOLYBDENE CARBIDES AND THEIR METHOD OF USE|
    US5444173A|1993-11-19|1995-08-22|Akzo Nobel N.V.|Catalytic bimetallic oxynitrides and nitrides|
    AU4964501A|2000-03-31|2001-10-15|Univ Michigan|Transition metal carbides, nitrides and borides and their oxygen containing analogs useful as water gas shift catalysts|
    US6897178B1|2003-10-31|2005-05-24|The Regents Of The University Of Michigan|Carbide/nitride based fuel processing catalysts|
    AU2010360471A1|2010-09-08|2013-03-21|Cor Brevis D.O.O.|Fuel and combustible mixture used as a substitute for fossil fuels in thermoelectric power plants, industrial and central heating furnaces|
    US9902614B2|2015-05-21|2018-02-27|Sabic Global Technologies B.V.|Light-switchable catalyst for the hydrogen production from para-formaldehyde|
    CN108025912A|2015-09-09|2018-05-11|沙特基础工业全球技术公司|For preparing the sane catalyst of hydrogen by paraformaldehyde|
    CN109588047A|2016-02-26|2019-04-05|沙特基础工业全球技术公司|Water-splitting is mediated using the carbon that formaldehyde carries out|
    JP2018035120A|2016-09-02|2018-03-08|市川　好男|Water for treating lifestyle disease and method for treating lifestyle disease|
    WO2019220322A1|2018-05-14|2019-11-21|Sabic Global Technologies B.V.|Hydrogen production from aqueous formaldehyde under mild basic conditions|
    CN111732076A|2020-07-06|2020-10-02|中国石油化工股份有限公司|Method for catalytically cracking hydrocarbons by using liquid catalyst|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP56021551A|JPS57140302A|1981-02-18|1981-02-18|Production of hydrogen|
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