Increasing total energy demand, depletion of fossil resources, and the need to limit the environmental impact of processes (emissions of pollutants and greenhouse gases) are the world’s major challenges today. They require the use of eco-efficient solutions for the energy mix integrating multi-energy interactions, the development and optimisation of which must be accompanied by research in a wide range of fields, disciplines and approaches. Among all the options of the energy mix, the use of alternative gaseous fuels is becoming increasingly important vis-à-vis fossil fuel resources. These fuels can be biogas generated by anaerobic fermentation, synthetic gases from biomass, industrial residual gases or dihydrogen produced by various processes. Combating global warming requires the reduction of greenhouse gas emissions through, inter alia, CO2 capture and sequestration (CCS) concepts at centralised industrial sites. Among CCS processes, the pre-combustion technique consists of gasifying, reforming and converting hydrocarbons to produce mainly dihydrogen usable as an energy carrier and on the other hand carbon dioxide which is then collected and stored geologically. Dihydrogen — called in the rest of the hydrogen document as usual — has the advantage of being a decarbonised fuel that generates only water vapour during its oxidation and can be produced from bio-based processes. It is estimated that if hydrogen were deployed on a large scale, it alone could contribute to a 20 % reduction in CO2 emissions. The recovery of hydrogen as an energy carrier is broken down into three successive stages: its production, storage & distribution and use. Hydrogen is virtually not present in the natural state on Earth in its stable molecular form, and a very large number of processes exist for its anthropogenic production. Hydrogen can be produced by gasification of fossil fuels — as formerly coal gas used as ‘city gas’ in the distribution network — or by gasification of biomass. Hydrogen is also present in residual gases of industrial processes, such as coking plant gas and blast furnace gas, some of which are still poorly valued. Hydrogen is also considered an energy carrier to compensate for the differences between electricity generation and demand, by producing it by electrolysis of water in hollow periods. This power-to-gas solution is all the more relevant for very intermittent renewable energy systems such as solar (day/night alternation) or wind (weather conditions). Other means of hydrogen production without electricity generation exist, such as photocatalytic decomposition of water under visible (solar) light. These innovative systems must always be optimised in terms of efficiency and the use of expensive materials. ...... See more in the attached document: “RAPHYD Application Form 2018 INSA”.