| Zugriffsnummer | 54928 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Impurity measurements in hydrogen using laser spectroscopy - Carbon monoxide as a case study |
| Autor(in); Institution |
Gorshelev, Victor; 3.4, Analytische Chemie der Gasphase, PTB-Braunschweig
|
| Quelle/Jahr | Technisches Messen: 92 (2025), 9-10, 353 - 360 |
| ISSN | 0171-8096 (print) ; 2196-7113 (online) |
| DOI | |
| Verlag | Berlin: De Gruyter |
| Freie Schlagworte | laser spectroscopy ; hydrogen quality ; metrology ; Optical Gas Standard ; OGS |
| Zusammenfassung | Hydrogen is an energy gas that is used commercially in a variety of applications that include fuel cells. Before utilization, hydrogen must meet certain quality characteristics. ISO 14687 specifies the limit values of impurities in H2. Carbon monoxide is an impurity that must be accurately measured in commercial H2 and its limit value as specified in ISO 14687 is 200 nmol/mol. In this work, we present a new laser spectrometric method for traceable CO impurity measurements in H2. The method is based on Optical Feedback Cavity Enhanced Absorption Spectroscopy (OF-CEAS). We demonstrate the applicability of the method by measuring CO amount fractions in H2 in the range of 0.05–20 μmol/mol. The traceability of the results to the SI units is addressed and uncertainties are evaluated following the GUM (Guide to the expression of uncertainty in measurement) principles. For the CO amount fraction measurement range of 0.05–20 μmol/mol, the relative combined uncertainty of the results is in the 1.5 % range, k = 1. |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Metrologie in der Chemie und Stoffeigenschaften |
| Innovationscluster | Umwelt und Klima |
| Forschungsprojekt | BMVI-NOW: RingWaBe: Vergleichbarkeit der Wasserstoffqualitätsanalytik (RingWaBe) |
| Förderinformationen (1) |
Förderername: Bundesministerium für Digitales und Verkehr (BMDV)
Titel der Förderung: BMVI-NOW: RingWaBe: Vergleichbarkeit der Wasserstoffqualitätsanalytik (RingWaBe) Förderungsnummer: 03B11026 URI der Förderung: https://www.ringwabe.ptb.de/home |