Supporting Information for the following article: "Hydrogen Generation and Serpentinization of Olivine under Flow Conditions"
Year: 2025
Type: article
Abstract: Serpentinization of olivine is often studied in the laboratory under batch conditions. Olivine conversion in situ with enhanced natural hydrogen production will likely be implemented via injection of aqueous solutions. Hence, transport is relevant to the extent of olivine reaction and, potentially, the morphology of precipitates formed. To test conditions for optimal H2 generation and outcomes, serpentinization was induced by injecting pH = 12.5 brine at 0.015 cm3/min (0.5 pore volumes per day) into an olivine sand pack (250 to < 355 µm grain size) at 245°C generating, at minimum 76 and 89 mol% H2 at 35 and 57 d, respectively. Grain-coating serpentine with radiating needles cemented the reacted sand grains. Importantly, pore space was maintained between the dissolving grains and the serpentine precipitates. Hence, reactivity continued as a result of fluid access to mineral surfaces, the large grain size, and the continuous injection of undersaturated alkaline fluids.
Source: Stanford Digital Repository
DOI: 10.25740/jz161px5889
Language: English
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6926952952
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