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Results for “CO 2 capture”
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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Implementation of a Core–Shell Design Approach for Constructing MOFs for CO 2 Capture
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Cold Temperature Direct Air CO 2 Capture with Amine-Loaded Metal–Organic Framework Monoliths
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Iron Impurity Impairs the CO 2 Capture Performance of MgO: Insights from Microscopy and Machine Learning Molecular Dynamics
Magnesium oxide (MgO) is a promising sorbent for direct air capture (DAC) of carbon dioxide. Iron (Fe) is a common impurity in naturally occurring MgO and minerals used to produce MgO, yet a molecular-scale understanding of Fe-doping effects on carbonation is lacking. Here, in this study, we observed reduced carbonation performance in Fe-doped MgO experimentally. The energetics of adsorbing a (bi)carbonate ion on pristine and Fe-doped MgO(001) surfaces were further investigated using ab initio and machine learning potential molecular dynamics coupled with metadynamics simulations. Both pristine and Fe-doped surfaces exhibited a basic (OH – ) hydration layer, where the (bi)carbonate ion adsorption is thermodynamically favorable. However, the dissolution of surface Fe had smaller energy barriers and was more favorable than Mg. Leached Fe likely neutralized the near-surface basicity, yielding reduced reactivity on Fe-doped MgO. Our observations offer critical insights for material selection and emphasize the importance of evaluating the geologic origin of earth materials used for DAC.
Electrochemically Induced CO 2 Capture Enabled by Aqueous Quinone Flow Chemistry
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Humidity-Responsive Polymorphism in CALF-20: A Resilient MOF Physisorbent for CO 2 Capture
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Advanced Theory and Simulation to Guide the Development of CO 2 Capture Solvents
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Carbonic Anhydrase Robustness for Use in Nanoscale CO 2 Capture Technologies
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Addition to “Carbonic Anhydrase Robustness for Use in Nanoscale CO 2 Capture Technologies”
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Application of Solid-Supported Amines for Thermocatalytic Reactive CO 2 Capture
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High-Capacity, Cooperative CO 2 Capture in a Diamine-Appended Metal–Organic Framework through a Combined Chemisorptive and Physisorptive Mechanism
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Effect of multiple calcination cycles on CO 2 capture efficiency during carbonation of MgO in a mineral looping process
Magnesium oxide (MgO) is considered as a potential sorbent for direct air capture of carbon dioxide in a looping process. Previous research on mineral looping for carbon capture from flue gas using MgO has shown deactivation of the sorbent with repeated cycles but repeated cycling for carbonation at ambient conditions has not been yet investigated. Here, we tested three cycles of carbonation for MgO nano-scale powders with different starting surface area. We find that carbonation efficiency is higher at higher surface area. No decrease in carbonation efficiency was observed with cycling, instead we find that carbonation efficiency and surface area are stable or even increasing with cycling. Based on our experimental data, we hypothesize that the carbonation in presence of relative humidity leads to first hydration of MgO, leading to formation of brucite (Mg(OH) 2 ). This formation of Mg(OH) 2 is a volume-increasing reaction, which leads to fracturing of MgO particles and results in an increase in surface area. We observed formation of amorphous and crystalline hydrated carbonates. The crystalline phase observed was nesquehonite (MgCO 3 ⋅ 3H 2 O). Our results show that MgO does not show any deactivation with repeated cycling for carbon capture at ambient conditions and in the presence of humidity. These findings therefore indicate that MgO is a suitable candidate as sorbent material for direct air capture of carbon dioxide.
Next steps for solvent-based CO 2 capture; integration of capture, conversion, and mineralisation
In this perspective, we detail how solvent-based carbon capture integrated with conversion can be an important element in a net-zero emission economy.
Enhanced H 2 recovery by coupling the water–gas shift reaction with in situ CO 2 capture and mineralization using earth abundant Ca- and Mg-silicates and hydroxides
Decarbonization of clean energy carriers such as H 2 by integrating multiphase chemical pathways with inherent carbon mineralization is a thermodynamically downhill approach designed for a sustainable energy and environmental future.
Water-enhanced CO 2 capture with molecular salt sodium guanidinate
Solid-state amine absorbent materials, including those containing guanidine derivatives, have received tremendous attention as the world combats the challenges of climate change.