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  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    1536652 Water gas catalysts SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 8 Nov 1977 [10 Nov 1976] 46426/77 Heading B1E [Also in Division C5] Catalysts for water gas shift reactions are spinels of compositions corresponding to formulae Cu 0À5 Zn 0À5 Fe 2 O 4 and Mg 1À9 Cr 0À1 O 4 .
    公开号:SU778706A3
    申请号:SU772540849
    申请日:1977-11-08
    公开日:1980-11-07
    发明作者:Эмиль Альфред Неель Эмманюэль；Дэфлэн Мишель；Ванрентергем Жак；Клеман Жан-Клод
    申请人:Шелл Интернэшнл Рисерч Маатсхаппий Б.В. (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD FOR PRODUCING HYDROGEN
    one
    The invention relates to methods for producing hydrogen and may find application in the chemical and gas processing industries.
    A known method for producing hydrogen by steam conversion of carbon monoxide is carried out in two stages at 500-530 ° C and 439-460 ° C, respectively 1.
    The main disadvantage of this method is the complexity of the instrumentation of the process and the increased consumption of water vapor.
    The closest to the described invention to the technical essence and the achieved result is a method of producing hydrogen by steam reforming of carbon monoxide at 175-425 ° C in the presence of a spinel type catalyst containing copper, iron and a bivalent metal on a carrier - aluminum trioxide 2.
    The main disadvantage of this method is the poor stability of the process when working with carbon monoxide containing sulfur impurities, which means that it is necessary to pre-clean the source gas from sulfur impurities.
    The aim of the invention is to ensure the stability of the process when working with sulfur-containing gas.
    The goal is achieved by steam reforming carbon monoxide at 175-425 ° C in the presence of a catalyst of the type of spinel on a carrier — aluminum trioxide, in which the latter is used spinel of composition Cio, 52po, 5Pe2O4-10 MgFei, 9Cro, iO4 with additions of potassium oxides and cesium.
    At the same time, additives of potassium and cesium oxides are introduced in an amount of 0.1-15 wt. %
    This method allows J5 to be converted to a sulfur-containing gas without pre-treatment.
    Additives of potassium and cesium oxides stabilize the catalyst and increase its service life.
    20 Example 1. The catalyst Cio, 52po, 5Pe2O4 is obtained by joint precipitation of the corresponding metal hydroxides in appropriate quantities. During precipitation, the pH of the aqueous solution of metal nitrates. In which the correct concentration of metal ions is created, is reduced to 6.2 by the addition of ammonia. The mixture is separated.
    by filtration, dried at 130 ° C for 10 hours, then calcined iri for 6 hours.
    By X-ray diffraction, it was established that the mixed crystals obtained have a spinel crystalline form.
    The calcined substances are sieved, particles with a diameter of 0.2-0.6 mm are used for the conversion of carbon monoxide into hydrogen with water vapor.
    Then, a gas of the following composition, by volume, is passed through a layer of catalyst particles together with water vapor:
    СО8,0
    SO20,0
    HaS0,8
    Ng70,6
    CH4 .0.6 Reaction conditions are as follows, not: temperature 300 ° C; pressure.e 30 bar (absolute); volume velocity of 3000 liters at normal temperature and pressure per 1 liter of catalyst per hour; the ratio of water vapor to gas is 1.
    89% of carbon monoxide in the gas was converted according to the following reaction: CO + H2O g H2 + CO2
    Example 2. The catalyst MgFei.gCro.iOi is obtained by joint deposition of the corresponding metal hydroxides in the desired ratio. With this, the pH of the aqueous solution of metal nitrates, the concentration of which has been adjusted to the desired value, is set at 6.2 by the addition of ammonia. The mixture is filtered, the precipitate is dried at 120 ° C for 10 hours and calcined at 500 ° C for 6 hours.
    With X-ray diffraction, it is shown that the mixture of crystals crystallized in the form of spinel, the calcined substance is sifted, and particles with a diameter of 5 0.2-0.6 mm were used for the reaction of conversion of carbon monoxide to hydrogen using water vapor. Then through the catalyst bed of these particles pass the gas of the following composition; by volume: 10CO8.0
    СО2-20,0
    NgZ0,8
    H270.6
    CH40,6
    权利要求:
    Claims (2)
    [1]
    1. A method for producing hydrogen by steam reforming of carbon monoxide at 175-425 ° C in the presence of a catalyst of the type of spinel deposited on aluminum trioxide, characterized in that, in order to control the process by excluding the stage of preliminary purification of gas from sulfur compounds, Analyzers use spinel of Cuo, 5Zno, 5Fe2O4 or MgFei, 9Cro, iO4 composition with additions of potassium oxides and cesium.
    [2]
    2. A process according to claim 1, characterized in that the additives of potassium and cesium oxides are introduced in an amount of 0.1-15% by weight.
    Sources of information taken into account in the examination - 1. Ioffe V. B. The Basics of Hydrogen Production. M., 1960, p. 117.
    2. Patent of the USSR No. 382261, cl. С01 В 1/11, 05.22.73 (prototype).
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    同族专利:
    公开号 | 公开日
    NL7712276A|1978-05-12|
    BR7707487A|1978-08-08|
    ZA776650B|1978-08-30|
    FR2370684B1|1981-08-14|
    CA1097079A|1981-03-10|
    US4166101A|1979-08-28|
    FR2370684A1|1978-06-09|
    DE2750006A1|1978-05-18|
    BE860468A|1978-05-05|
    JPS5360891A|1978-05-31|
    IT1109473B|1985-12-16|
    DE2750006C2|1991-02-28|
    IN145517B|1978-10-28|
    AU509245B2|1980-05-01|
    AU2971177A|1979-04-26|
    GB1536652A|1978-12-20|
    JPS6120481B2|1986-05-22|
    引用文献:
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    US3716589A|1968-11-27|1973-02-13|Agency Ind Science Techn|Process for the synthesis of 2,6-dimethylphenols|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7633900A|FR2370684B1|1976-11-10|1976-11-10|
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