4 ms·
Using renewable electricity to make Hydrogen is bonkers today. Using high temperature nuclear heat is not. You just need gas-cooled reactors that can make 900
by hairytrog 7y ago
Using renewable electricity to make Hydrogen is bonkers today.
Using high temperature nuclear heat is not. You just need gas-cooled reactors that can make 900 to 1000 °C steam.
This company is making gas-cooled reactor in Canada and claim they can make competitive Hydrogen: https://usnc.com/FCM.html https://usnc.com/FCM.html
The processes are different from electrolysis. From https://art.inl.gov/NGNP/NEAC%202010/INL_NGNP%20References/R-6917-00-01%20NGNP%20Hydrogen%20Tech%20-%20IRT%20Eval.pdf https://art.inl.gov/NGNP/NEAC%202010/INL_NGNP%20References/R...
"1. SI Process: A thermochemical process that incorporates: (1) endothermic decomposition of hydrogen iodide (HI) at about 450°C in the presence of a carbon catalyst to yield hydrogen and I2, (2) recycle of the iodine to a concurrent or countercurrent column reactor where it reacts exothermically at about 120°C with sulfur dioxide (SO2) via the Bunsen reaction to form hydriodic acid (HI) and sulfuric acid (H2SO4), (3) gravimetric separation of the HI and H2SO4, and (4) thermal/catalytic decomposition of sulfuric acid (H2SO4) to oxygen and SO2 at high temperature, up to 900°C, with the SO2 recycled back to the Bunsen reaction section. In the SI process, H2SO4 acts as oxygen carrier and HI as a hydrogen carrier.
2. HTSE Process: A ceramic electrolyte and electrode electrolysis process operating at up to 950°C. Water is the only reactant, and high temperatures allow for some of the energy required to split the steam (water) to be supplied as heat as opposed to electricity alone, as in LTE cells.
3. HyS Process: A hybrid process that produces hydrogen and oxygen in a polymer membrane based electrolysis cell operating at temperatures below 125°C. In the HyS process, SO2 is used to depolarize the cell and allow it to operate at lower voltages and hence higher efficiencies and current densities as compared to higher temperature electrolysis cells. Sulfuric acid is produced along with hydrogen in the cells, with the SO2 recycled from a sulfuric acid decomposer similar to that used in the SI process."