Nickel-based catalyst for preparing reducing gas by reforming methane-carbon dioxide and preparation method thereof

Nickel-based catalyst for preparing reducing gas by reforming methane-carbon dioxide and preparation method thereof

  • CN 105,413,734 B
  • Filed: 12/07/2015
  • Issued: 05/26/2020
  • Est. Priority Date: 12/07/2015
  • Status: Active Grant
First Claim
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1. A preparation method of a nickel catalyst for preparing reducing gas by methane-carbon dioxide reforming comprises an active component, a carrier and an auxiliary agent, wherein the components in percentage by mass are as follows:

  • 10-30% of active component, 3-20% of auxiliary agent and the balance of carrier, wherein the sum of the total mass percentage is 100%;

    the active component is nickel oxide;

    the auxiliary agent is one or a mixture of more of lanthanum oxide, neodymium oxide and cerium oxide;

    the preparation method comprises the following steps;

    (1) weighing raw materials in proportion, and preparing a modified molecular sieve carrier;

    adding any one or a mixture of more of montmorillonite, kaolin and diatomite to at least one of an X-type molecular sieve, a Y-type molecular sieve and a phosphorus-aluminum molecular sieve, adding short fibers, lignin, starch or a pore-expanding agent commonly used in industry, mixing and stirring, crushing the mixture into powder with more than 300 meshes, adding water to the powder, uniformly stirring, simultaneously adding one or more of vegetable oil, tung oil, carboxymethyl cellulose and polyvinyl alcohol, extruding into a honeycomb coal-shaped porous carrier in a forming machine after uniform stirring, calcining the honeycomb coal-shaped porous carrier for 2 to 12 hours at the temperature of 1000 to 1400 ℃

    , and cooling at room temperature after calcination to obtain the honeycomb coal-shaped porous carrier;

    (2) dipping the active component and the auxiliary agent, namely dissolving the nitrate of the active component and the auxiliary agent in deionized water, uniformly stirring by magnetic force, injecting into the prepared carrier, and dipping for 2-4 hours at 30-100 ℃

    under the condition of continuous stirring to dip the active component on the carrier in a salt form;

    (3) heating and decomposing;

    after the impregnation is finished, drying for 1-10 hours at the temperature of 60-150 ℃

    , and then heating to 300-560 ℃

    for heating decomposition for 1-8 hours to obtain the nickel catalyst for preparing the reducing gas by reforming methane-carbon dioxide;

    the shape of the catalyst is the shape of honeycomb briquette;

    the pore-expanding agent is any one or a mixture of several of short fiber, lignin and starch, and accounts for 3-5% of the total mass of the total catalyst.

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