(US5134109-A)      Catalyst, for reforming a hydrocarbon with steam, has a platinum gp. metal (I) deposited on a carrier, comprising at least one of zirconia and stabilised zirconia, which has a vol. of pores, with pore sizes of 500 Angstroms or smaller, of 0.15 ml per g or greater; a vol. of pores, having pore sizes of more than 500 Angstroms, of 0.14 ml per g or smaller; and an average pore size of 90 Angstroms or greater.    Pref. metal (I) is at least one of rhodium and ruthenium. Pref. at least one metal of cobalt and manganese is deposited on the carrier, as a promoter component.    ADVANTAGE -   Catalyst has high catalytic activity and long catalytic life    (JP94040963-B2)      Catalyst for reforming a hydrocarbon with steam comprises platinum gp. metal(s) deposited on a carrier having a vol. of 0.15 ml/g or more of pores of size 500 Angstrom or less, a vol. of 0.14 ml/g or less of pores of size over 500 Angstrom and an average pore size of 90 Angstrom or more.    Pref. the metal is Rh and/or Ru, 0.01-5 wt.% on the carrier. Co and/or Mn is present as promoter, at 0.1-10 wt.%. K and/or Ba may be present as further promoter component, 0.01-2.5 wt.%. The carrier is zirconia or stabilised zirconia. The stabiliser is an oxide e.g. yttrium, magnesium or cerium oxide.    USE/ADVANTAGE -   Specified pore size distribution provides the catalyst with high activity and long life. The hydrocarbon is e.g. a 1-10C alkane, cycloalkane or a mixt. e.g. naphtha. Prod. is a mixed gas containing hydrogen, carbon monoxide, carbon dioxide and methane. The hydrogen may be used in a fuel cell.    (JP96022378-B2)      Catalyst for reforming a hydrocarbon with steam comprises platinum gp. metal(s) deposited on a carrier having a vol. 0.15 ml/g or more of pores of size 500 Angstrom or less, a vol. 0.14 ml/g or less of pores of size over 500 Angstrom, and an average pore size 90 Angstrom or more.    Pref. the metal is Rh and/or Ru, 0.01-5 wt.% on the carrier; Co and/or Mn is present as promoter, at 0.1-10 wt.%. K and/or Ba may be present as further promoter component, 0.01-2.5 wt.%. The carrier is zirconia or stabilised zirconia; the stabiliser is an oxide, e.g. yttrium, magnesium or cerium oxide.    USE/ADVANTAGE -   Specified pore size distribution provides the catalyst with high activity and long life. The hydrocarbon is e.g. a 1-10C alkane, cycloalkane or a mixt., e.g. naphtha. Prod. is a mixed gas containing hydrogen, carbon monoxide, carbon dioxide and methane, having uses opt. with sepn.; the hydrogen may be used in a fuel cell.