Low-temperature hydrogenation of tetralin over noble-metal catalysts in the presence of sulfur

摘要

High aromatics content in distillate fuels is undesirable since it lowers the fuel quality and contributes to the formation of environmentally harmful emissions,such as particulate matter and NO_x.For diesel fuel,reducing the aromatics content results in increased cetane number and improved combustion characteristics.For these reasons,the production of ultra-clean fuels is likely to include reductions in aromatics content.Recent legislation in Texas has mandated that by April 1,2005,for 110 counties,the maximum allowable aromatics content in on-road diesel fuel will be 10 vol%.This standard was previously adopted by the California Air Resources Board(CARB)in October 1993.