3 ms·
As it is apparently essentially a purified bauxite, I imagine it would be a desirable raw material for an aluminum smelter. Consuming it in this manner would cr
by mannykannot 5y ago
As it is apparently essentially a purified bauxite, I imagine it would be a desirable raw material for an aluminum smelter. Consuming it in this manner would create a closed cycle for generating hydrogen from electricity (as aluminum smelting is an electrolytic process) - electrolysis of water by proxy, if you will.
https://www.usgs.gov/centers/nmic/bauxite-and-alumina-statistics-and-information?qt-science_support_page_related_con=0#qt-science_support_page_related_con https://www.usgs.gov/centers/nmic/bauxite-and-alumina-statis...
One downside is that currently, graphite anodes are used, with which the oxygen of the hydroxide anion reacts, creating CO2 in an amount commensurate with the amount of of hydrogen produced - so this process would be far from carbon-neutral, though presumably this CO2 could be relatively easily captured in a pure form (disposing of it is another matter.)
Here's some research into reducing the CO2 production (by 50%) as well as being more efficient, but it is still in development with some as-yet unsolved problems:
https://news.osu.edu/electrode-to-lower-cost-of-aluminum-smelting-lessen-pollution/ https://news.osu.edu/electrode-to-lower-cost-of-aluminum-sme...