The use of hydrogen as an alternative energy source has recently been the subject of considerable attention. Hydrogen as an energy source or fuel is addressed in many strategic documents at both European and national level – the European Green Deal, Fit for 55, the Czech Republic's Hydrogen Strategy, the National Action Plan for Sustainable Mobility, etc. If we want to use hydrogen as a fuel in road transport, we need to consider how it is produced and the associated amount of unwanted impurities that can contaminate it and have a negative impact on fuel cells. Analyses of hydrogen fuel purity are not yet routinely performed in the Czech Republic to the extent specified by the ČSN ISO 14687 and ČSN ISO 21087 standards. Apart from the National Physical Laboratory in the United Kingdom, these analyses are not widespread abroad either. The analyses are demanding in terms of time and money, as well as in terms of achieving very low detection limits due to trace concentrations of impurities in hydrogen. High demands are also placed on analytical technology; the determination of impurities requires the use of a large amount of financially demanding instrumentation, which also requires highly qualified operators of these instruments. Hydrogen is expected to be used as the fuel of the future, and given the various methods of its production, it will be necessary to monitor its quality.
Our goal is to introduce and accredit the analytical methods needed to determine impurities in hydrogen using gas chromatography (GC). These are impurities that arise during the production of hydrogen. It is important to monitor their concentration due to the possible damage to fuel cells in vehicles. The impurities for which analyses will be introduced include helium (He), nitrogen (N2), argon (Ar), oxygen (O2), methane (CH4), total sulfur compounds, hydrocarbons (CxHy), total halogenated compounds, carbon monoxide (CO), carbon dioxide (CO2), and formaldehyde.
Based on the established method for determining He in a hydrogen matrix according to National Physical Laboratory - Report AS 64, the functionality of which will be verified internally by a validation study and externally by a bilateral comparison with an accredited laboratory, a "Methodology for determining He in hydrogen by gas chromatography (GC/TCD)" will be prepared. The methodology will be prepared in the form of a standard operating procedure and will serve as the basis for the accreditation of this determination method.
Based on the established method for determining Ar, O2, N2 in a hydrogen matrix according to National Physical Laboratory – Report AS 64, the functionality of which will be verified internally by a validation study and externally as part of a bilateral comparison with an accredited laboratory, a "Methodology for determining Ar, O2, N2 in hydrogen by gas chromatography (GC/PDHID)". The methodology will be prepared in the form of a standard operating procedure and will serve as the basis for the accreditation of this determination method.
Based on the established method for determining CO, CO2, CxHy, CH4 in a hydrogen matrix according to National Physical Laboratory – Report AS 64, or ASTM D7675 (for CxHy), the functionality of which will be verified internally by a validation study and externally by a bilateral comparison with an accredited laboratory, the following will be prepared "Methodology for the determination of CO, CO2, CxHy, CH4 in hydrogen by gas chromatography (GC/FID)". The methodology will be developed in the form of a standard operating procedure and will serve as the basis for the accreditation of this method.
Based on the established method for the determination of sulfur compounds, halogen compounds, and CH2O in a hydrogen matrix according to ASTM D7892, the functionality of which will be verified internally by a validation study and externally by a bilateral comparison with an accredited laboratory, the following will be prepared "Methodology for the determination of sulfur compounds, halogen compounds, and CH2O in hydrogen by gas chromatography (GC/MS/TD)" will be prepared. The methodology will be developed in the form of a standard operating procedure and will serve as the basis for the accreditation of this determination method.
This project, Determination and optimization of vegetation strips with natural tree species composition for traffic noise reduction, is co-financed with state support from the Technology Agency of the Czech Republic and the Ministry of Transport of the Czech Republic under the TRANSPORT 2030 Program. This project is financed under the National Recovery Plan from the European Recovery and Resilience Facility.
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