| http://www.w3.org/ns/prov#value | - The supports are preferably not promoted with a halogen such as fluorine as this generally increases the acidity of the support. [0024] Preferred metal catalysts include cobalt/molybdenum (1-10% Co as oxide, 10-40% Mo as oxide) nickel/molybdenum (1-10% Ni as oxide, 10-40% Co as oxide) or nickel/tungsten (1-10% Ni as oxide, 10-40% W as oxide) on alumina.
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