A kind of pre-reduction type high-temperature methanation catalyst and preparation method thereof

A kind of pre-reduction type high-temperature methanation catalyst and preparation method thereof

  • CN 105,797,785 B
  • Filed: 04/15/2016
  • Issued: 04/09/2019
  • Est. Priority Date: 04/15/2016
  • Status: Active Grant
First Claim
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1. a kind of preparation method of pre-reduction type high-temperature methanation catalyst, which comprises the steps of:

  • Step 1, the soluble-salt of nickel nitrate, aluminum nitrate, auxiliary agent oxide is configured to aqueous solution, wherein nickel ion concentration is0.1~0.55mol/L, aluminium ion concentration are 0.2~2.5mol/L, and assistant concentration is 0.002~0.12mol/L;

    Step 2, aqueous solution made of step 1 is added in reaction kettle, stirring is heated to 50~80 DEG C, oxalates is then addedPrecipitant solution, and adjusting pH with 10% ammonium hydroxide is 7, catalyst semi-finished product are obtained by filtration in washing;

    The oxalate precipitation agentConcentration is 0.1~1.5mol/L, and oxalate precipitation agent is one of oxalic acid, ammonium oxalate, potassium oxalate, sodium oxalate;

    Step 3, by catalyst semi-finished product dry roasting, 100~200 DEG C are then cooled to, after being passed through a small amount of air to roastingProduct is passivated, and is eventually adding graphite and water, and compression moulding after mixing to obtain the final product;

    The mass percent of each component in manufactured catalyst are as follows;

    Ni 15~45%, Al2O330~75%, auxiliary agent 2~18%,Graphite 2~8%, surplus are water, one or more in auxiliary agent Mg, Ca, Ba, La oxide.

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