Hydrogen pathways in France: Results of the HyFrance3 Project

Role of hydrogen in resolving electricity grid issues

“…The pressure in salt caverns typically varies between 70 and 200 bar [16]. This low value maintains the cavern's mechanical integrity (to avoid crushing by the surrounding geomechanical pressure), so the cavern is pre-filled with the appropriate quantity of hydrogen: cushion gas.…”

“…The concept of "semi-large-scale" can also be found for volumes of tens of thousands of cubic meters. Hydrogen, rarely found in the form of natural underground deposits, can very easily be stored in a large-scale underground site [16]. The analysis performed in the HyFrance3 project [16] led to the consideration of large-scale underground storage in salt caverns, the most appropriate by far for storing pressurized hydrogen, both in terms of the leak-tight nature of the caverns and the dynamics of injection and extraction.…”

“…To evaluate the compressor data, we used two-stage piston reciprocating compressors. The HyFrance3 data [16] allowed us to reconstitute the investment (CAPEX) and operating (OPEX) graphs as a function of the compression power and the hydrogen flow at the electrolyser output (Fig. 1).…”

“…Initially, we determined the compressor costs: investment, operation and maintenance, from the compression power. To do this, we used data from the HyFrance3 project [16]. To evaluate the compressor data, we used two-stage piston reciprocating compressors.…”

Study on Water Splitting Potential of Some Metallurgical Wastes for Production of Hydrogen

“…Therefore, development of a reliable and cost-effective technology to produce hydrogen is very important in the context of climate change mitigation. Not only the economically feasible production of hydrogen but also its transportation and storage in large quantities are noted among the challenges to overcome [4,5]; consequently, on-site production of inexpensive hydrogen at a steelmaking enterprise can be considered as an important step for bringing about novel hydrogen-based ironmaking processes to an industrial scale.…”