Abstract: Aiming at the two-stage hydrogenation technology(SRJET) developed by SINOPEC to produce biomass jet fuel (bio jet fuel for short) from waste catering oil, basing on the life cycle assessment analysis, the accounting boundary was determined, and the carbon footprint of the life cycle of bio jet fuel (total direct and indirect CO₂ emissions per unit of product lifecycle) was analyzed. The carbon emission reduction of bio-jet fuel replacing petroleum-based jet fuel was evaluated by comparing of the life-cycle carbon emissions. The results showed that the total carbon emission during the life cycle of producing 1 kg bio-jet fuel was 0.55 kg, and within the 90% confidence interval of the prediction result, the CO₂ emission of bio-jet fuel was 80.9%-93.2% lower than that of petroleum-based jet fuel. The promotion of bio-jet fuel is of great significance to achieve the strategic goal of emission peak and carbon neutrality.

Key words: bio-jet fuel, life cycle, carbon footprint, carbon emission reduction, uncertainty analysis