Total Nitrogen Determination in Bio-based Fuels

This technical report outlines the methodology for determining total nitrogen (TN) content in bio-based fuels according to ASTM D4629, a standard test method for trace nitrogen in liquid hydrocarbons. The report describes the challenges associated with ultra-trace analysis, emphasizing the need for reliable results in compliance with regulations. It details a fast and optimized combustion process that ensures reproducibility regardless of the biofuel type. The report presents the operational parameters and instrumentation used, including the compEAct N elemental analyzer equipped with HiPerSens detection technology. The analysis involved a catalyst-free, high-temperature combustion process, which is critical for achieving low detection limits. The results section provides average TN measurements for various biofuels, demonstrating the effectiveness of the method in maintaining low nitrogen levels. The report concludes with a discussion on the reproducibility of results and the efficiency of the sample processing time, highlighting the system's capability for high sample throughput.