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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,153 records · Page 64
All sourcesNASA NTRSDOE OSTI
DOE OSTI2018

Roll-to-Roll Advanced Materials Manufacturing Lab Consortium

Oak Ridge National Laboratory (ORNL), Argonne National Laboratory (ANL), Lawrence Berkeley National Laboratory (LBNL), and the National Renewable Energy Laboratory (NREL) in collaboration with Eastman Kodak Business Park (Kodak) and Citrine Informatics (Citrine) formed a consortium to broadly disseminate materials, process science, and advanced technologies to industry in the area of R2R manufacturing.

36 MATERIALS SCIENCE↗
DOE OSTI2018

Electrical conductivity of methane hydrate with pore fluids: new results from the lab

With renewed U.S. Department of Energy (DOE) support to characterize the evolution of gas hydrate systems using marine electromagnetic (EM) methods paired with laboratory studies, we extended previous electrical conductivity measurements on methane hydrate, with and without sediment, to include a liquid component. Here we report the pronounced effects of adding pure H 2 O water or NaCl-bearing brine, and we track the development of the fluid phase within samples. Pure H 2 O pore water, generated in situ through partial dissociation of methane hydrate at 5°C, increases conductivity by at least a factor of 3 (0.5 on a log scale), as water accumulates in roughly 15 ± 5 vol.% of the sample. Brine, generated by adding NaCl to sample reactants prior to methane hydrate synthesis, elicited a considerably stronger effect; at 5°C, the addition of 2.5wt% NaCl increases conductivity by over 2 orders of magnitude (log-scale) relative to pure methane hydrate. Cryogenic scanning electron microscopy (cryo-SEM) imaging of quenched samples revealed the distribution of the liquid component within samples, thus allowing evaluation of conduction mechanisms and pathways.

58 GEOSCIENCES↗