| http://www.w3.org/ns/prov#value | - Catalysts used for hydrorefining and hydrocracking combine a large surface area support (generally 100 to 800 m2 /g) with low superficial acidity and a hydrogenating function supplied by at least one metal from group VIB of the periodic table such as molybdenum or tungsten and/or at least one group VIII metal such as cobalt or nickel.
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