50%
of all refinery streams in the USA now pass through hydrotreaters for conversion, finishing, and pretreatment purposes. Hydrodesulfurization is the largest application of catalytic technology in terms of the volume of material processed. (Source: Topsøe H., Clausen B.S., Massoth F.E. (1996) Hydrotreating Catalysis. In: Anderson J.R., Boudart M. (eds) Catalysis. Catalysis-Science and Technology, vol 11. Springer, Berlin, Heidelberg)