Multiphase sequestration geochemistry: Model for mineral carbonation

White, Signe K.; McGrail, B. Peter; Schaef, Herbert T.; Hu, Jianzhi; Hoyt, David; Felmy, Andrew R.; Rosso, Kevin M.; Wurstner, S.K.

doi:10.1016/j.egypro.2011.02.472

Cited by 21 publications

(40 citation statements)

References 20 publications

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“…Conventional MAS NMR rotors can contain liquids and gases at near ambient pressure, and various designs have been proposed to increase the pressure limits. In particular, several pressurized MAS rotor systems − were pioneered at PNNL, where they were initially employed for geochemical ,− and biogeochemical studies. Although these previous rotor designs were capable of handling pressures up to 200 bar at 20 °C, they required the use of a loading chamber that enabled mechanical opening and closing of the rotor valve under pressure. , Such loading chambers are expensive, custom equipment, and the dead volume of the vessel increases the gas consumption (an important factor with isotopically labeled gases).…”

Section: Introductionmentioning

confidence: 99%

Operando MAS NMR Reaction Studies at High Temperatures and Pressures

Walter

Qi²,

Chamas³

et al. 2018

J. Phys. Chem. C

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Operando MAS NMR studies provide unique insights into the details of chemical reactions; comprehensive information about temperature-and time-dependent changes in chemical species is accompanied by similarly rich information about changes in phase and chemical environment. Here we describe a new MAS NMR rotor (the WHiMS rotor) capable of achieving internal pressures up to 400 bar at 20 °C or 225 bar at 250 °C, a range that includes many reactions of interest. The MAS NMR spectroscopy enabled by these rotors is ideal for studying the behavior of mixed-phase systems, such as reactions involving solid catalysts and volatile liquids, with the potential to add gases at high pressure. The versatile operation of the new rotors is demonstrated by collecting operando 1 H and 13 C spectra during the hydrogenolysis of benzyl phenyl ether, catalyzed by Ni/γ-Al 2 O 3 at ca. 250 °C, both with and without H 2 (g) supplied to the rotor. The 2-propanol solvent, which exists in the supercritical phase under these reaction conditions, serves as an internal source of H 2 . The NMR spectra provide detailed kinetic profiles for the formation of the primary products toluene and phenol as well as secondary hydrogenation and etherification products.

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Section: Introductionmentioning

confidence: 99%

Operando MAS NMR Reaction Studies at High Temperatures and Pressures

Walter

Qi²,

Chamas³

et al. 2018

J. Phys. Chem. C

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“…The CRB system was used as an example case and our results were compared to earlier reported laboratory experiments and numerical simulations of CO 2 -basalt interactions. As CO 2 stored underground will distribute spatially in the reservoir to give a range of reactive conditions, such as the potential of reactions by H 2 O dissolved in supercritical CO 2 [7,8] or reactions in the H 2 O-rich phase from residually trapped CO 2 , we divided the simulations into three systems representing different parts of CO 2 storage: (1) basalt alteration in the H 2 O-rich phase at constant CO 2 pressure; (2) basalt alteration in a H 2 O saturated CO 2 phase, and (3) reactions at the boundary of the CO 2 plume where CO 2 diffuses into the aquifer from the boundary of the CO2 plume (Figure 1). …”

Section: Introductionmentioning

confidence: 99%

On the potential for CO2mineral storage in continental flood basalts – PHREEQC batch- and 1D diffusion–reaction simulations

2012

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Continental flood basalts (CFB) are considered as potential CO2 storage sites because of their high reactivity and abundant divalent metal ions that can potentially trap carbon for geological timescales. Moreover, laterally extensive CFB are found in many place in the world within reasonable distances from major CO2 point emission sources.Based on the mineral and glass composition of the Columbia River Basalt (CRB) we estimated the potential of CFB to store CO2 in secondary carbonates. We simulated the system using kinetic dependent dissolution of primary basalt-minerals (pyroxene, feldspar and glass) and the local equilibrium assumption for secondary phases (weathering products). The simulations were divided into closed-system batch simulations at a constant CO2 pressure of 100 bar with sensitivity studies of temperature and reactive surface area, an evaluation of the reactivity of H2O in scCO2, and finally 1D reactive diffusion simulations giving reactivity at CO2 pressures varying from 0 to 100 bar.Although the uncertainty in reactive surface area and corresponding reaction rates are large, we have estimated the potential for CO2 mineral storage and identified factors that control the maximum extent of carbonation. The simulations showed that formation of carbonates from basalt at 40 C may be limited to the formation of siderite and possibly FeMg carbonates. Calcium was largely consumed by zeolite and oxide instead of forming carbonates. At higher temperatures (60 – 100 C), magnesite is suggested to form together with siderite and ankerite. The maximum potential of CO2 stored as solid carbonates, if CO2 is supplied to the reactions unlimited, is shown to depend on the availability of pore space as the hydration and carbonation reactions increase the solid volume and clog the pore space. For systems such as in the scCO2 phase with limited amount of water, the total carbonation potential is limited by the amount of water present for hydration of basalt.

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“…The acidified brine will dissolve the existing carbonates, thereby liberating Ca 2+ and/or Mg 2+ cations that will eventually recombine with the injected CO 2 to again form carbonates and/or bicarbonates [41]. The overall bicarbonate reaction is included below.…”

Section: Carbonatesmentioning

confidence: 99%

Mineralization of Carbon Dioxide: A Literature Review

et al. 2015

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Research on carbon capture and storage has been focused on CO 2 storage in geologic formations, with many potential risks. An alternative to conventional geologic storage is carbon mineralization, where CO 2 is reacted with metal cations to form carbonate minerals. Mineralization methods can be broadly divided into two categories: in situ and ex situ. In situ mineralization, or mineral trapping, is a component of underground geologic sequestration, in which a portion of the injected CO 2 reacts with alkaline rock present in the target formation to form solid carbonate species. In ex situ mineralization, the carbonation reaction occurs above ground, within a separate reactor or industrial process. This literature review is meant to provide an update on the current status of research on CO 2 mineralization.

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Multiphase sequestration geochemistry: Model for mineral carbonation

Cited by 21 publications

References 20 publications

Operando MAS NMR Reaction Studies at High Temperatures and Pressures

Operando MAS NMR Reaction Studies at High Temperatures and Pressures

On the potential for CO2mineral storage in continental flood basalts – PHREEQC batch- and 1D diffusion–reaction simulations

Mineralization of Carbon Dioxide: A Literature Review

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