Progressing TDLAS instrumentation for SI-traceable measurements of nitrous oxide in maritime applications

Abstract Nitrous oxide (N 2 O) is gaining interest in maritime applications for several reasons, primarily related to engine performance enhancement, emissions reduction, and auxiliary power supply. While N 2 O can enhance combustion efficiency and reduce certain emissions, uncontrolled use could result in increased NO x formation and other pollutants. Effective N 2 O monitoring is critical in maritime applications for ensuring operational safety, regulatory compliance, and optimal performance. We introduce an innovative first-principles N 2 O spectrometer designed specifically for maritime applications, such as monitoring emissions during and after combustion processes. This TDLAS based spectrometer targets the P29e line at 4.55 µm spectral band and provides direct absolute mole fraction measurements, eliminating the necessity for prior or routine calibration.