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At least 1,279 records · Page 71
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KCd(CO2)3 by Materials Project

KCd(CO2)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.77–2.94 Å. Cd2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.33–2.40 Å. There are two inequivalent C3+ sites. In the first C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.25 Å. In the second C3+ site, C3+ is bonded in a bent 120 degrees geometry to two equivalent O2- atoms. Both C–O bond lengths are 1.26 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Cd2+, and one C3+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Cd2+, and one C3+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+, one Cd2+, and one C3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr(CO2)3 by Materials Project

Sr(CO2)3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.57–2.84 Å. There are three inequivalent C+3.33+ sites. In the first C+3.33+ site, C+3.33+ is bonded in a bent 150 degrees geometry to two O2- atoms. There is one shorter (1.22 Å) and one longer (1.23 Å) C–O bond length. In the second C+3.33+ site, C+3.33+ is bonded in a bent 150 degrees geometry to two O2- atoms. There is one shorter (1.21 Å) and one longer (1.23 Å) C–O bond length. In the third C+3.33+ site, C+3.33+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.27 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sr2+ and one C+3.33+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+3.33+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sr2+ and one C+3.33+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sr2+ and one C+3.33+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Sr2+ and one C+3.33+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sr2+ and one C+3.33+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaMnH3(CO2)3 by Materials Project

NaMnH3(CO2)3 crystallizes in the cubic P2_13 space group. The structure is three-dimensional. Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share edges with three equivalent MnO6 octahedra. There are three shorter (2.40 Å) and three longer (2.48 Å) Na–O bond lengths. Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share edges with three equivalent NaO6 octahedra. There are three shorter (2.22 Å) and three longer (2.23 Å) Mn–O bond lengths. C2+ is bonded in a trigonal planar geometry to one H1+ and two O2- atoms. The C–H bond length is 1.11 Å. Both C–O bond lengths are 1.27 Å. H1+ is bonded in a single-bond geometry to one C2+ atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Mn2+, and one C2+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Mn2+, and one C2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CO2 by Materials Project

CO2 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. C4+ is bonded to four equivalent O2- atoms to form corner-sharing CO4 tetrahedra. All C–O bond lengths are 1.40 Å. O2- is bonded in a bent 120 degrees geometry to two equivalent C4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaMg(CO2)2 by Materials Project

BaMg(CO2)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ba2+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. There are four shorter (2.79 Å) and four longer (2.83 Å) Ba–O bond lengths. Mg2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Mg–O bond lengths are 2.18 Å. C2+ is bonded in a bent 120 degrees geometry to two equivalent O2- atoms. Both C–O bond lengths are 1.32 Å. O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, one Mg2+, and one C2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Co2(PO3)5 by Materials Project

Co2(PO3)5 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are two inequivalent Co+2.50+ sites. In the first Co+2.50+ site, Co+2.50+ is bonded to five O2- atoms to form distorted CoO5 square pyramids that share corners with five PO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.93–2.11 Å. In the second Co+2.50+ site, Co+2.50+ is bonded to five O2- atoms to form distorted CoO5 square pyramids that share corners with five PO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.96–2.13 Å. There are five inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two CoO5 square pyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.60 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CoO5 square pyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CoO5 square pyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.62 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two CoO5 square pyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.61 Å. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two CoO5 square pyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Co+2.50+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Co+2.50+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Co+2.50+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Co+2.50+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co+2.50+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co+2.50+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Co+2.50+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the thirteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Co+2.50+ and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Co+2.50+ and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Co+2.50+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CO2 by Materials Project

CO2 is Cyanogen Chloride-derived structured and crystallizes in the orthorhombic Cmce space group. The structure is zero-dimensional and consists of four carbon dioxide molecules. C4+ is bonded in a linear geometry to two equivalent O2- atoms. Both C–O bond lengths are 1.17 Å. O2- is bonded in a single-bond geometry to one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CO2 by Materials Project

CO2 is Cyanogen Chloride-derived structured and crystallizes in the trigonal R-3c space group. The structure is zero-dimensional and consists of twenty-four carbon dioxide molecules. C4+ is bonded in a linear geometry to two equivalent O2- atoms. Both C–O bond lengths are 1.18 Å. O2- is bonded in a single-bond geometry to one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnMoH6(CO2)2 by Materials Project

MoSnH6(CO2)2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four equivalent SnC2O4 octahedra. The corner-sharing octahedra tilt angles range from 0–31°. There are a spread of Mo–O bond distances ranging from 1.77–1.81 Å. Sn4+ is bonded to two C4- and four O2- atoms to form SnC2O4 octahedra that share corners with four equivalent MoO4 tetrahedra. There are one shorter (2.12 Å) and one longer (2.13 Å) Sn–C bond lengths. There are a spread of Sn–O bond distances ranging from 2.14–2.57 Å. There are two inequivalent C4- sites. In the first C4- site, C4- is bonded in a distorted trigonal non-coplanar geometry to one Sn4+ and three H1+ atoms. All C–H bond lengths are 1.09 Å. In the second C4- site, C4- is bonded in a distorted trigonal non-coplanar geometry to one Sn4+ and three H1+ atoms. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C4- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C4- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C4- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C4- atom. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Mo6+ and one Sn4+ atom. In the second O2- site, O2- is bonded in a linear geometry to one Mo6+ and one Sn4+ atom. In the third O2- site, O2- is bonded in a distorted linear geometry to one Mo6+ and one Sn4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CO2 by Materials Project

CO2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded to four O2- atoms to form corner-sharing CO4 tetrahedra. There are a spread of C–O bond distances ranging from 1.39–1.42 Å. In the second C4+ site, C4+ is bonded to four O2- atoms to form corner-sharing CO4 tetrahedra. There are a spread of C–O bond distances ranging from 1.38–1.42 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two C4+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two C4+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent C4+ atoms. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent C4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2025

CO2 Plume Imaging with Accelerated Deep Learning-based Data Assimilation Considering Multiple Realizations: Application to the Illinois Basin-Decatur Carbon Sequestration Project

We propose a fast and efficient deep learning workflow for near real-time data assimilation, forecasting and visualization of CO2 plume evolution in saline aquifer and demonstrate its application at a field site. Unlike the previous work, this study incorporates the impact of spatial heterogeneity using multiple realizations. In the proposed workflow, a neural network model utilizes available monitoring data such as downhole pressure measurements as input and predicts the propagating pressure ‘front’ using the diffusive time of flight (DTOF) map which is considered as representative reservoir image of the flow field. The DTOF is the arrival time of pressure front propagation, which can be computed by the Fast Marching Method rapidly without flow simulations. Reservoir model calibration can be implemented by selecting the training data samples that describe the predicted DTOF map based on observed data. The power and efficacy of our workflow is demonstrated by application to the Illinois Basin-Decatur Project.

CO2 plume imaging↗
DOE OSTI2022

Advanced Ceramic Membranes/Modules for Ultra Efficient Hydrogen (H2) Production/Carbon Dioxide (CO2) Capture for Coal-Based Polygeneration Plants: Fabrication, Testing and CFD Modeling

Inorganic membrane-based systems are a promising technology for precombustion CO2 capture with simultaneous H2 production. State-of-the-art packages for high temperature and pressure service consist of multiple tube membrane bundles prepared in a "candle filter" configuration, in which the membrane tubes are open at one end and sealed at the other. This configuration is used for practical reasons, specifically the need to minimize problems due to thermal expansion mismatch between the ceramic tube bundle and the steel housing. However, the primary technical problem with the candle filter format for commercial-scale installations is the inability to purge the tube side (typically the permeate side), a feature that is crucial for high H2 recovery. In this study, the focus is to design and fabricate the first dual-end open full ceramic multiple tube membrane bundle that enables tube side (permeate) purge for gas separation applications. An additional key feature of this design is the simplified module layout, as the membrane bundles can be installed end-to-end with tube side (permeate) flow directly from one bundle to the next. This layout simplifies the membrane to housing seals and yields significant improvement in membrane packing density. Detailed focus areas in our studies include: (i) Materials development and preparation of the tube-to-tube sheet potting for the dual-ended bundle; (ii) the sealing and optimal module configuration design to minimize membrane stress upon module mounting; (iii) the demonstration, via the fabrication of CMS and Pd-alloy membranes supported on full-size, dual-ended ceramic support bundles, of the first example of a purgeable ceramic membrane and module; and (iv) development of a CFD model of the membrane module for calculation of feed flow distribution, and for use in scale-up, and capital cost estimating. The CFD model was validated using experimental data with the multi-tubular membrane system, employing He/N2 as a model gas mixture (surrogate for H2/CO2), and has been shown to be quite accurate. Employing the model, we are able to study the effects of operating pressure and temperature, feed and sweep gas flow rates, and the choice of membrane tube configuration on system performance.

20 FOSSIL-FUELED POWER PLANTS↗
DOE OSTI2024

Novel Full-Ceramic Multi-Tubular Membrane Systems for Pre-Combustion CO2 Capture with Simultaneous H2 Production: Fabrication, Performance Testing, and 3D CFD Modeling

Inorganic membranes show promise for application in pre-combustion CO2 capture with simultaneous H2 production. State-of-the-art systems for use under high temperature and pressure conditions consist of multiple membrane tube bundles prepared in a "candle-filter" configuration, in which the membrane tubes are open at one end and sealed at the other. This configuration is used for practical reasons, specifically the need to minimize potential problems due to thermal expansion mismatch, at high temperatures, between the ceramic tube bundle and the steel housing. The primary technical problem with the candle-filter configuration for use in commercial-scale installations is the inability to purge the permeate side (typically the tube side), a feature that is crucial for high H2 recovery. In this study, we fabricated dual-end open, commercial-size ceramic multiple-tube bundles made of zeolite, palladium (Pd), and carbon molecular sieve (CMS) membranes that enable permeate-side (tube-side) purge for gas separation applications. Experimental gas separation data with these membrane bundles under harsh operating conditions (temperatures up to 350 and pressures up to 800 psig), to be presented at the meeting, manifest excellent performance. Parallel to the membrane bundle construction and testing efforts, we have also developed a detailed 3D CFD modeling package using COMSOL Multiphysics software to gain more insight into the effect on the H2 purity and recovery of the detailed geometry of the multi-tubular membrane system, including the number of tubes used, their dimensions, and placement in the bundle, as well as the number, type, and positioning of internal baffles and other flow-enhancement accessories. The CFD package is validated with experimental data from different systems (1-tube, 3-tube, and 19-tube bundles), and shows high accuracy in predicting the experimental results (<5 % error in all cases). The results of our study show that the detailed internal geometry of these multi-tubular membrane systems has a considerable impact on the performance of the system as the flow maldistribution within the shell-side can substantially decrease (>40%) the H2 recovery.

20 FOSSIL-FUELED POWER PLANTS↗