Global warming potential analysis of bio‑jet fuel based on life cycle assessment

Due to the large amount of greenhouse gas(GHG)emissions and the high dependence on fossil energy,the aviation industry has attracted a lot of attention for emission reduction and sustainable development.Biomass is a green and sustainable renewable resource,and its chemical conversion to produce bio-jet fuel is considered to be an effective way to replace fossil jet fuel and achieve emission reduction.In this study,the cradle-to-grave life cycle analysis is conducted for three bio-jet fuel conversion pathways,including biomass aqueous phase reforming(APR),hydrogenated esters and fatty acids(HEFA),and hydrothermal liquefaction(HTL).Compared with fossil jet fuels,the three bio-jet fuels have a great advantage on global warming potential(GWP),contributing 29.2,43.6 and 51.2 g CO_(2)-eq/MJ respectively.In general,as a relatively new bio-jet fuel conversion technology,the technology of aqueous phase reforming has minimal environmental impact.If the barriers of raw material availability and economy could be broken down,bio-jet fuel will have great development potential in replacing fossil jet fuel and realizing sustainable development.