Arthur J. Suchanek Criterion Catalyst Co. L.P. Houston Producing low-aromatics diesel fuel may be accomplished catalytically rather than through large capital investment. Pilot-plant test results show that some catalyst types and catalyst systems such as various combinations of nickel-molybdenum (NiMo) and nickel-tungsten (NiW) on alumina in the presence of sulfur; noble metal on alumina for low-sulfur feeds; and noble metal on zeolite for moderate sulfur feeds can achieve the proposed tougher specifications on diesel aromatics at minimum capital investment. For the past several years, we have been hearing that highway diese...

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