The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
Bernard J. Coakley - One of the best experts on this subject based on the ideXlab platform.
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UltraMafic and Mafic Rock Distributions in Central Alaska and Implications for CO_2 Sequestration
Natural Resources Research, 2015Co-Authors: Carla Susanne Tomsich, Catherine L. Hanks, David B. Stone, Rainer J. Newberry, Bernard J. CoakleyAbstract:Understanding the distribution of Mafic and ultraMafic Rocks in Interior Alaska provides important constraints on potential economic uses of these igneous Rocks, such as future sites for CO_2 sequestration. However, poor surface exposure limits understanding of the subsurface geometry and extent of these Rocks. In this study, regional aeromagnetic and gravity surveys, geologic maps, drill hole data, physical Rock properties, and magnetic data from surface samples were used to build an integrated potential field model that provides a model of the distribution and volume of two of the most significant of these bodies, the Mafic and ultraMafic Rocks of the Tozitna and Livengood Terranes. Although solutions to theoretically calculated geophysical models are non-unique and consequently subject to unquantified uncertainties, our highly integrated model provides a first-order approximation of the distribution of these Rocks. Modeling results indicate that Mafic and ultraMafic Rocks in both Terranes are sheet-like, probably thrust-bounded, and continue to significant depths. First approximation volume estimates suggest that there is up to 3,300 billion m^3 of Mafic and ultraMafic Rocks between the surface and 3,000 m depth within 10 km of the existing transportation corridor. The maximum carbonation potential of Mg-bearing minerals via a combination of surface and subsurface CO_2 injection techniques in these two Terranes is 722 gigatons of CO_2. Assuming an actual CO_2 uptake capacity of these Rocks of only 1 %, this study indicates there is a sufficient quantity of Mafic and ultraMafic Rocks adjacent to existing transportation corridors to meet foreseeable CO_2 sequestration needs in Interior Alaska.
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ultraMafic and Mafic Rock distributions in central alaska and implications for co2 sequestration
Natural resources research, 2015Co-Authors: Carla Susanne Tomsich, Catherine L. Hanks, David B. Stone, Rainer J. Newberry, Bernard J. CoakleyAbstract:Understanding the distribution of Mafic and ultraMafic Rocks in Interior Alaska provides important constraints on potential economic uses of these igneous Rocks, such as future sites for CO2 sequestration. However, poor surface exposure limits understanding of the subsurface geometry and extent of these Rocks. In this study, regional aeromagnetic and gravity surveys, geologic maps, drill hole data, physical Rock properties, and magnetic data from surface samples were used to build an integrated potential field model that provides a model of the distribution and volume of two of the most significant of these bodies, the Mafic and ultraMafic Rocks of the Tozitna and Livengood Terranes. Although solutions to theoretically calculated geophysical models are non-unique and consequently subject to unquantified uncertainties, our highly integrated model provides a first-order approximation of the distribution of these Rocks. Modeling results indicate that Mafic and ultraMafic Rocks in both Terranes are sheet-like, probably thrust-bounded, and continue to significant depths. First approximation volume estimates suggest that there is up to 3,300 billion m3 of Mafic and ultraMafic Rocks between the surface and 3,000 m depth within 10 km of the existing transportation corridor. The maximum carbonation potential of Mg-bearing minerals via a combination of surface and subsurface CO2 injection techniques in these two Terranes is 722 gigatons of CO2. Assuming an actual CO2 uptake capacity of these Rocks of only 1 %, this study indicates there is a sufficient quantity of Mafic and ultraMafic Rocks adjacent to existing transportation corridors to meet foreseeable CO2 sequestration needs in Interior Alaska.
Daniel M Sturmer - One of the best experts on this subject based on the ideXlab platform.
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geological carbon sequestration modeling Mafic Rock carbonation using point source flue gases
International Journal of Greenhouse Gas Control, 2020Co-Authors: Daniel M Sturmer, Regina N Tempel, Mohamad Reza SoltanianAbstract:Abstract Basaltic Rocks are being considered as a key host for carbon dioxide (CO2) storage. This is a function of their global distribution and relative reactivity, resulting in CO2 mineralization. However, the reactivity of Mafic minerals allows for reaction and sequestration of other gases associated with point source emissions. Though many mechanisms exist to separate CO2 from flue gas, these can be costly system additions for existing point source emitters. In this study, we model the effect of adding minor amounts of SO2 to CO2 during ex-situ mineral carbonation of basalt samples from Nevada, USA. We compare reaction path geochemical models at temperatures between 0° and 200 °C and at three different SO2 concentrations. Results from these models are compared to published data evaluating the interaction of these samples with CO2 only. The models have carbon trapped in four minerals (magnesite, siderite, dolomite, and dawsonite). Sulfur is sequestered as one sulfide (pyrite) and up to four sulfates (alunite, anhydrite, gypsum, and thenardite). With added SO2, between 43–161 grams of carbon are trapped per kg Rock reacted. These models show -25 % to +18 % change in carbon sequestration, though decreases are more prevalent with increasing SO2. One major issue with adding SO2 as a reactant is pyrite precipitation, which may result in acid Rock drainage from the reaction product. However, adding NO2 as a reactant inhibits pyrite formation by increasing oxygen fugacity. Ultimately, these methods can be used as an initial, inexpensive screening tool when evaluating between potential Mafic Rock carbonation projects.
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modeling Mafic carbonation efficiency using Mafic Rock chemistries from nevada usa
Computers & Geosciences, 2019Co-Authors: Daniel M Sturmer, Regina N Tempel, Jonathan G PriceAbstract:Abstract Mineral carbonation is one of the many ways that are being actively investigated to sequester point-source carbon dioxide emissions. However, relations between reaction conditions, variations in reactant mineral composition, and carbon sequestration potential are poorly understood. In this study we used reaction path geochemical modeling to evaluate carbon sequestration potential during ex-situ mineral carbonation of ten Mafic Rock samples from Nevada, USA. Models were run using arbitrary dissolution kinetics at temperatures between 0 and 200 °C. A subset of models were run using true dissolution kinetics. In the models, carbon is sequestered in 5 mineral phases: magnesite, siderite, dolomite, calcite, and dawsonite, with magnesite and dolomite the most abundant. Dawsonite sequesters carbon at T > 150 °C in most of the arbitrary kinetics models but is not a significant carbon sink in the models using true dissolution kinetics. The arbitrary kinetics models resulted in 4.5–13 mol of carbon sequestered per kg of reacted Mafic Rock. True kinetics models only resulted in 1–2 mol of carbon sequestered, but the models only reacted 12.5 to 15 wt percent of the Mafic Rock inputs. Product minerals using the arbitrary kinetics model have volumes 150%–470% larger than the reactant volumes, whereas using true kinetics the models have a modest increase. Modeling presented herein confirms several areas of Nevada as having potential for Mafic Rock carbonation, some of which are located near existing coal- and natural gas-fired power plants. As shown in this study, reaction path modeling is a vital and inexpensive tool to help optimize costs and reaction conditions for ex-situ Mafic Rock carbonation projects.
Carla Susanne Tomsich - One of the best experts on this subject based on the ideXlab platform.
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UltraMafic and Mafic Rock Distributions in Central Alaska and Implications for CO_2 Sequestration
Natural Resources Research, 2015Co-Authors: Carla Susanne Tomsich, Catherine L. Hanks, David B. Stone, Rainer J. Newberry, Bernard J. CoakleyAbstract:Understanding the distribution of Mafic and ultraMafic Rocks in Interior Alaska provides important constraints on potential economic uses of these igneous Rocks, such as future sites for CO_2 sequestration. However, poor surface exposure limits understanding of the subsurface geometry and extent of these Rocks. In this study, regional aeromagnetic and gravity surveys, geologic maps, drill hole data, physical Rock properties, and magnetic data from surface samples were used to build an integrated potential field model that provides a model of the distribution and volume of two of the most significant of these bodies, the Mafic and ultraMafic Rocks of the Tozitna and Livengood Terranes. Although solutions to theoretically calculated geophysical models are non-unique and consequently subject to unquantified uncertainties, our highly integrated model provides a first-order approximation of the distribution of these Rocks. Modeling results indicate that Mafic and ultraMafic Rocks in both Terranes are sheet-like, probably thrust-bounded, and continue to significant depths. First approximation volume estimates suggest that there is up to 3,300 billion m^3 of Mafic and ultraMafic Rocks between the surface and 3,000 m depth within 10 km of the existing transportation corridor. The maximum carbonation potential of Mg-bearing minerals via a combination of surface and subsurface CO_2 injection techniques in these two Terranes is 722 gigatons of CO_2. Assuming an actual CO_2 uptake capacity of these Rocks of only 1 %, this study indicates there is a sufficient quantity of Mafic and ultraMafic Rocks adjacent to existing transportation corridors to meet foreseeable CO_2 sequestration needs in Interior Alaska.
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ultraMafic and Mafic Rock distributions in central alaska and implications for co2 sequestration
Natural resources research, 2015Co-Authors: Carla Susanne Tomsich, Catherine L. Hanks, David B. Stone, Rainer J. Newberry, Bernard J. CoakleyAbstract:Understanding the distribution of Mafic and ultraMafic Rocks in Interior Alaska provides important constraints on potential economic uses of these igneous Rocks, such as future sites for CO2 sequestration. However, poor surface exposure limits understanding of the subsurface geometry and extent of these Rocks. In this study, regional aeromagnetic and gravity surveys, geologic maps, drill hole data, physical Rock properties, and magnetic data from surface samples were used to build an integrated potential field model that provides a model of the distribution and volume of two of the most significant of these bodies, the Mafic and ultraMafic Rocks of the Tozitna and Livengood Terranes. Although solutions to theoretically calculated geophysical models are non-unique and consequently subject to unquantified uncertainties, our highly integrated model provides a first-order approximation of the distribution of these Rocks. Modeling results indicate that Mafic and ultraMafic Rocks in both Terranes are sheet-like, probably thrust-bounded, and continue to significant depths. First approximation volume estimates suggest that there is up to 3,300 billion m3 of Mafic and ultraMafic Rocks between the surface and 3,000 m depth within 10 km of the existing transportation corridor. The maximum carbonation potential of Mg-bearing minerals via a combination of surface and subsurface CO2 injection techniques in these two Terranes is 722 gigatons of CO2. Assuming an actual CO2 uptake capacity of these Rocks of only 1 %, this study indicates there is a sufficient quantity of Mafic and ultraMafic Rocks adjacent to existing transportation corridors to meet foreseeable CO2 sequestration needs in Interior Alaska.
Regina N Tempel - One of the best experts on this subject based on the ideXlab platform.
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geological carbon sequestration modeling Mafic Rock carbonation using point source flue gases
International Journal of Greenhouse Gas Control, 2020Co-Authors: Daniel M Sturmer, Regina N Tempel, Mohamad Reza SoltanianAbstract:Abstract Basaltic Rocks are being considered as a key host for carbon dioxide (CO2) storage. This is a function of their global distribution and relative reactivity, resulting in CO2 mineralization. However, the reactivity of Mafic minerals allows for reaction and sequestration of other gases associated with point source emissions. Though many mechanisms exist to separate CO2 from flue gas, these can be costly system additions for existing point source emitters. In this study, we model the effect of adding minor amounts of SO2 to CO2 during ex-situ mineral carbonation of basalt samples from Nevada, USA. We compare reaction path geochemical models at temperatures between 0° and 200 °C and at three different SO2 concentrations. Results from these models are compared to published data evaluating the interaction of these samples with CO2 only. The models have carbon trapped in four minerals (magnesite, siderite, dolomite, and dawsonite). Sulfur is sequestered as one sulfide (pyrite) and up to four sulfates (alunite, anhydrite, gypsum, and thenardite). With added SO2, between 43–161 grams of carbon are trapped per kg Rock reacted. These models show -25 % to +18 % change in carbon sequestration, though decreases are more prevalent with increasing SO2. One major issue with adding SO2 as a reactant is pyrite precipitation, which may result in acid Rock drainage from the reaction product. However, adding NO2 as a reactant inhibits pyrite formation by increasing oxygen fugacity. Ultimately, these methods can be used as an initial, inexpensive screening tool when evaluating between potential Mafic Rock carbonation projects.
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modeling Mafic carbonation efficiency using Mafic Rock chemistries from nevada usa
Computers & Geosciences, 2019Co-Authors: Daniel M Sturmer, Regina N Tempel, Jonathan G PriceAbstract:Abstract Mineral carbonation is one of the many ways that are being actively investigated to sequester point-source carbon dioxide emissions. However, relations between reaction conditions, variations in reactant mineral composition, and carbon sequestration potential are poorly understood. In this study we used reaction path geochemical modeling to evaluate carbon sequestration potential during ex-situ mineral carbonation of ten Mafic Rock samples from Nevada, USA. Models were run using arbitrary dissolution kinetics at temperatures between 0 and 200 °C. A subset of models were run using true dissolution kinetics. In the models, carbon is sequestered in 5 mineral phases: magnesite, siderite, dolomite, calcite, and dawsonite, with magnesite and dolomite the most abundant. Dawsonite sequesters carbon at T > 150 °C in most of the arbitrary kinetics models but is not a significant carbon sink in the models using true dissolution kinetics. The arbitrary kinetics models resulted in 4.5–13 mol of carbon sequestered per kg of reacted Mafic Rock. True kinetics models only resulted in 1–2 mol of carbon sequestered, but the models only reacted 12.5 to 15 wt percent of the Mafic Rock inputs. Product minerals using the arbitrary kinetics model have volumes 150%–470% larger than the reactant volumes, whereas using true kinetics the models have a modest increase. Modeling presented herein confirms several areas of Nevada as having potential for Mafic Rock carbonation, some of which are located near existing coal- and natural gas-fired power plants. As shown in this study, reaction path modeling is a vital and inexpensive tool to help optimize costs and reaction conditions for ex-situ Mafic Rock carbonation projects.
Jonathan G Price - One of the best experts on this subject based on the ideXlab platform.
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modeling Mafic carbonation efficiency using Mafic Rock chemistries from nevada usa
Computers & Geosciences, 2019Co-Authors: Daniel M Sturmer, Regina N Tempel, Jonathan G PriceAbstract:Abstract Mineral carbonation is one of the many ways that are being actively investigated to sequester point-source carbon dioxide emissions. However, relations between reaction conditions, variations in reactant mineral composition, and carbon sequestration potential are poorly understood. In this study we used reaction path geochemical modeling to evaluate carbon sequestration potential during ex-situ mineral carbonation of ten Mafic Rock samples from Nevada, USA. Models were run using arbitrary dissolution kinetics at temperatures between 0 and 200 °C. A subset of models were run using true dissolution kinetics. In the models, carbon is sequestered in 5 mineral phases: magnesite, siderite, dolomite, calcite, and dawsonite, with magnesite and dolomite the most abundant. Dawsonite sequesters carbon at T > 150 °C in most of the arbitrary kinetics models but is not a significant carbon sink in the models using true dissolution kinetics. The arbitrary kinetics models resulted in 4.5–13 mol of carbon sequestered per kg of reacted Mafic Rock. True kinetics models only resulted in 1–2 mol of carbon sequestered, but the models only reacted 12.5 to 15 wt percent of the Mafic Rock inputs. Product minerals using the arbitrary kinetics model have volumes 150%–470% larger than the reactant volumes, whereas using true kinetics the models have a modest increase. Modeling presented herein confirms several areas of Nevada as having potential for Mafic Rock carbonation, some of which are located near existing coal- and natural gas-fired power plants. As shown in this study, reaction path modeling is a vital and inexpensive tool to help optimize costs and reaction conditions for ex-situ Mafic Rock carbonation projects.
