Basf Se Corporation

Ulrich Floerchinger

Ekkehard Schwab

Stephan Andreas Schunk

Gerhard Cox

Thomas Roussiere

Andrian Milanov

Guido Wasserschaff

Bernd Hinrichsen

The invention relates to a nickel hexaaluminate-comprising catalyst for reforming hydrocarbons, preferably methane, in the presence of carbon dioxide, which comprises hexaaluminate in a proportion in the range from 65 to 95% by weight, preferably from 70 to 90% by weight, and a crystalline, oxidic secondary phase selected from the group consisting of LaAlO, SrAlOand BaAlOin the range from 5 to 35% by weight, preferably from 10 to 30% by weight. The BET surface area of the catalyst is &#x2267;5 m/g, preferably &#x2267;10 m/g. The molar nickel content of the catalyst is &#x2266;3 mol %, preferably &#x2266;2.5 mol % and more preferably &#x2266;2 mol %. The interlayer cations are preferably Ba and/or Sr. The process for producing the catalyst comprises the steps: (i) production of a mixture of metal salts, preferably nitrate salts of Ni and also Sr and/or La, and a nanoparticulate aluminum source, (ii) molding and (iii) calcination. The catalyst of the invention is brought into contact with hydrocarbons, preferably methane, and COin a reforming process, preferably at a temperature of &#x3e;800&#xb0; C. The catalyst is also distinguished by structural and preferred properties of the nickel, namely that the nickel particles mostly have a tetragonal form and the particles have a size of &#x2266;50 nm, preferably &#x2266;40 nm and particularly preferably &#x2266;30 nm, and are present finely dispersed as grown-on hexaaluminate particles. The catalyst has only a very low tendency for carbonaceous deposits to be formed.

Nickel hexaaluminate-containing catalyst for reforming hydrocarbons in the presence of carbon dioxide

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Dudenhofen, Germany

Ulrich Floerchinger