TRENDS IN DECARBONIZATION OF TRANSPORT FUELS

Decarbonization of transport fuels initially happened to store more energy on board of transport vehicles. As most vehicular emissions are carbon containing chemical species, now the emission regulations are providing impetus to this trend through reduction in aromatic and olefin content of petroleum fuels and move towards use of gaseous fuels; natural gas, LPG and finally to hydrogen. In this paper trends in transport fuels and effect of their chemical composition and hydrogen/carbon ratio on emissions especially the particulate (PM), nitrogen oxides (NO_x) and green house gas emissions are discussed.