Finland
Utilization of Hydrogen Fuel in Reheating Furnace and its Effect on Oxide Scale Formation of Low-carbon Steels
Nov 2024
Publication
The transition from fossil-based fuel to hydrogen combustion in steel reheating furnaces is a possible way to decrease the process-originated CO2 emissions significantly. This potential change alters the furnace gas atmo sphere’s composition impacting the oxide scale formation of the slab surface. Dynamic heating tests are per formed for three low-carbon steels using different simulated combustion atmospheres including natural gas coke oven gas and hydrogen combustion in air and hydrogen combustion in oxygen. Significant differences are found in the oxidation behavior of steel grades in the simulated hydrogen reheating scenario. A steel grade with low Mn content only has an 18% increase in oxidation between methane-air to hydrogen-oxygen methods while it is 41% for a high Mn and Si steel grade and 65% for a high-Mn steel grade. Thus in terms of material loss increase by oxidation the transition of the heating method causes the least problems for the low-Mn steel grade.
Power-to-X Economy: Green E-hydrogen, E-fuels, E-chemicals, and E-materials Opportunities in Africa
Aug 2024
Publication
Africa has enormous potential to produce low-cost e-fuels e-chemicals and e-materials required for complete defossilisation using its abundant renewable resources widely distributed across the continent. This research builds on techno-economic investigations using the LUT Energy System Transition Model and related tools to assess the power-to-X potential in Africa for meeting the local demand and exploring the export potential of power-to-products applications. In this context we analysed the economic viability of exporting green e-fuel echemicals and e-materials from Africa to Europe. We also present the core elements of the Power-to-X Economy i.e. renewable electricity and hydrogen. The results show that hydrogen will likely not be traded simply due to high transport costs. However there is an opportunity for African countries to export e-ammonia e-methanol ekerosene jet fuel e-methane e-steel products and e-plastic to Europe at low cost. The results show that Africa’s low-cost power-to-X products backed by low-cost renewable electricity mainly supplied by solar photovoltaics is the basis for Africa’s vibrant export business opportunities. Therefore the Power-to-X Economy could more appropriately be called a Solar-to-X Economy for Africa. The Power-to-X Economy will foster socio-economic growth in the region including new industrial opportunities new investment portfolios boost income and stimulate local technical know-how thereby delivering a people-driven energy economy. Research on the topic in Africa is limited and at a nascent stage. Thus more studies are required in future to guide investment decisions and cater to policy decisions in achieving carbon neutrality with e-fuels e-chemicals and e-materials.
Hydrogen in Natural Gas Grids: Prospects and Recommendations About Gas Flow Meters
Aug 2024
Publication
To inject green hydrogen (H2) into the existing natural gas (NG) infrastructure is one way to decarbonize the European energy system. However asset readiness is necessary to be successful. Preliminary analysis and experimental results about the compatibility of hydrogen and natural gas mixtures (H2NG) with the actual gas grids make the scientific community confident about the feasibility. Nevertheless specific technical questions need more research. A significant topic of debate is the impact of H2NG mixtures on the performance of state-ofthe-art fiscal measuring devices which are essential for accurate billing. Identifying and addressing any potential degradation in their metrological performance due to H2NG is critical for decision-making. However the literature lacks data about the gas meters’ technologies currently installed in the NG grids such as a comprehensive overview of their readiness at different concentrations while data are fragmented among different sources. This paper addresses these gaps by analyzing the main characteristics and categorizing more than 20000 gas meters installed in THOTH2 project partners’ grids and by summarizing the performance of traditional technologies with H2NG mixtures and pure H2 based on literature review operators experience and manufacturers knowledge. Based on these insights recommendations are given to stakeholders on overcoming the identified barriers to facilitate a smooth transition.
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