Speaker
Description
Reliable quantification of the biogenic carbon content in liquid fuels is needed to satisfy EU renewable-fuel requirements (Directive (EU) 2018/2001). Accelerator-mass spectrometry (AMS) provides a fast, self-consistent, and well-validated approach to distinguishing fossil from biogenic carbon, fully in accordance with ASTM D6866-2024 Rev A and EN 16640 standards.
In this study, we employ a sealed-tube oxidation procedure in which samples are heated to 550°C in a muffle furnace for 12 hours in the presence of MnO₂, oxidising all presented carbon to CO₂. The produced CO₂ is then cryogenically purified (a water trap cooled to -30°C, followed by a liquid nitrogen trap) while graphite is converted in a catalysed graphitisation reactor.
Our liquid test matrix comprises alcohol (e.g., ethanol and isopropyl alcohol with their blends) for verification of our method. Liquids of purely fossil and purely biogenic origin were used to prepare additional samples with varying proportions of the biogenic component. The samples included commercially available diesel (B7) and petrol (E10), representing different fractions of biogenic carbon content. Biogenic fractions were determined with respect to a constant-contamination model, and the associated standard deviation was evaluated. The biogenic carbon content in analysed samples ranged from 4.5 ± 0.2 % to 5.7 ± 0.3 %.
The obtained results demonstrate that the sealed-tube MnO₂ combustion method coupled with ¹⁴C and ¹³C AMS analyses delivers a reliable, precision experimental approach for routine certification of biofuel blends, thereby supporting the regulatory compliance and sustainability initiatives in the automotive sector.
Keywords: AMS; ¹⁴C; Biofuels; Combustion; MnO₂; Blend-Ratio Determination
| Pracovisko fakulty (katedra)/ Department of Faculty | Katedra jadrovej fyziky a biofyziky |
|---|---|
| Tlač postru/ Print poster | Nebudem požadovať tlač posteru / I don't require to print the poster |
