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Carbon Dioxide - OSTI GOV

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Last Updated: 10 January 2023

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Potential use of engineered nanoparticles in ocean fertilization for large-scale atmospheric carbon dioxide removal

AOF carbon sequestration results seem lower than natural ocean fertilization processes, owing in large part to the poor bioavailability of added nutrients, as well as low export rates of AOF-produced biomass to the deep ocean. Net CO 2 capture for iron, SiO 2 and Al 2 O 3 ENPs with costs of 2 to 3 times greater than conventional AOF, according to life-cycle analysis and cost estimates, while improving AOF productivity by ENPs could substantially raise net CO 2 capture and minimize these costs.

Source link: https://www.osti.gov/biblio/1905988


A Scalable Process for Upcycling Carbon Dioxide (CO 2 ) and Coal Combustion Residues into Construction Products

Anthropogenic sources of carbon dioxide are available from a variety of sources, but the most common of these are ordinary Portland cement production and fossil fuel combustion. Cement production is the world's biggest global CO 2 source from carbonates' mineral decomposition. The combination of the limestone decomposition and heating requirements of the clinkering process results in cement production accounting for 89% of annual global CO 2 emissions. The aim of this project is to demonstrate the Reversa process, which has progressed from a TRL-3 system on the bench-scale up to TRL-6 technology at the pilot-scale. The Reversa technology was used to demonstrate the safe manufacture of concrete masonry units at bench scale, where the units met the required 13. 8 MPa compressive strength standards. A practical substitute for traditional concrete, this project's overall aim was to accelerate the development of a CO 2 mineralization process that synergistically uses CO 2 in flue gas and coal combustion residues to synthesize carbonated concrete. The CO 2 use during the production runs at NCCC and ITC is a function of time, 24-h CO 2 uptake, electricity use, and 28-d net area compressive strength for each run. The NCCC demo did outshine the NCCC's CO2 utilization efficiency of 75% for some production runs.

Source link: https://www.osti.gov/biblio/1811705


Improved retrievals of carbon dioxide from Orbiting Carbon Observatory-2 with the version 8 ACOS algorithm

Since September 2014, NASA's Orbiting Carbon Observatory-2 satellite has been collecting measurements of reflected solar spectra and using them to predict atmospheric carbon dioxide levels. For the nearly 100 000 cloud-free measurements recorded by OCO-2 each day, this paper provides information about the OCO-2 retrieval algorithm, versions 7 and 8, which is used to calculate the column-averaged dry air mole fraction of atmospheric CO 2 for the column-averaged dry air mole fraction of atmospheric CO 2 for the column-averaged dry air mole fraction of atmospheric CO 2 for the column-averaged dry air mole fraction of atmospheric CO 2 for the column-averaged dry air mole fraction of atmospheric CO 2 for the column-averaged cloud-free results collected by OCO-2 The algorithm is based on the Atmospheric Carbon Observations from Space algorithm, which has been applied to observations from the Greenhouse Gases Observing SATellite since 2009, with modifications required for OCO-2. Many aspects of the extracted data products have been enhanced by updates to the radiance calibration and retrieval forward model in version 8. Although this paper outlines the significant advancements in the ACOS algorithm, it will continue to evolve and improve as the CO2 data record grows.

Source link: https://www.osti.gov/biblio/1557767


Time Lapse Charged Wellbore Casing Controlled Source Electromagnetic Surveys for Monitoring Injected Carbon Dioxide

An oil field's life is extended by a carbon dioxide injection for enhanced oil recovery and long-term carbon storage while keeping CO2 out of the atmosphere. Monitoring CO2 migration during EOR operations is vital to increasing efficiency and detecting unexpected CO2 migration within a short time. At an active EOR site undergoing CO2 injection, we track CO2 migration using time-lapse charged well casing controlled source electromagnetics at a live EOR site under CO2 injection. This innovative survey device aims to monitor CO2 injection safely and unobtrusively from the surface by electromagnetic field measurements since the reservoir's electrical conductivity changes as CO2 replaces other fluids. Charged well casing studies reveal deeper conductivity trends than those that use only surface electrodes, allowing CO2 movement at the depth of the reservoir to be shown more clearly.

Source link: https://www.osti.gov/biblio/1868028

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions