Evaluation of ultramafic deposits in the Eastern United States and Puerto Rico as sources of magnesium for carbon dioxide sequestration

Goff, Fraser; Guthrie, George D.; Lipin, Bruce R.; Fite, Melissa; Counce, D.; Kluk, Emily; Ziock, H.

doi:10.2172/754045

Cited by 17 publications

(7 citation statements)

References 22 publications

(55 reference statements)

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“…Horoman Hill in Japan (100 Mt), and the Xixia and Yubian Counties in China (9 Mt) (Caserini et al, 2022;Harben and Smith, 2006). In the United States, a large dunite deposit (200 Gt) is present at Twin Sister Mountain (Caserini et al, 2022;Goff et al, 2000;Kremer et al, 2019), and a smaller one (300 Mt) in North Carolina (Caserini et al, 2022;Goff and Lackner, 1998).…”

Section: Availability Of Olivinementioning

confidence: 99%

Review and syntheses: Ocean alkalinity enhancement and carbon dioxide removal through coastal enhanced silicate weathering with olivine

Geerts,

Hylén,

Meysman

2024

Preprint

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Abstract. Coastal enhanced silicate weathering (CESW) is increasingly receiving attention as a marine-based carbon dioxide removal (CDR) technology. The method aims to achieve ocean alkalinity enhancement (OAE) by introducing fast-weathering silicate minerals into coastal systems. The latter is envisioned to act as a large natural biogeochemical reactor, where ambient physical and biological processes can stimulate silicate dissolution, thus generating a concomitant alkalinity release and increasing the seawater’s capacity to sequester CO2. Olivine has been forwarded as the prime candidate mineral for CESW, but to the present, no results from larger-scale field studies in actual coastal systems are available, so all information is exclusively derived from idealized laboratory experiments. As a result, key uncertainties remain concerning the efficiency, CO2 sequestration potential, and impact of olivine-based CESW under relevant field conditions. In this review, we summarize recent research advancements to bridge the gap between existing laboratory results and the real-world environment in which CESW is intended to take place. To this end, we identify the key parameters that govern the dissolution kinetics of olivine in coastal sediments, and the associated CO2 sequestration potential, which enable us to identify a number of uncertainties that are outstanding with respect to the implementation and upscaling of olivine-based CESW, as well as the monitoring, reporting, and verification (MRV). From our analysis, we conclude that the current knowledge base is not sufficient to predict the outcome of in situ CESW applications. Particularly, the impact of pore water saturation on the olivine dissolution rate and the question of the additionality of alkalinity generation remain critical unknowns. To more confidently assess the potential and impact of olivine-based CESW, dedicated pilot studies under filed conditions are needed, which should be conducted at a sufficiently large spatial scale and monitored for a long enough time with sufficient temporal resolution. Additionally, our analysis indicates that the specific sediment type of the application site (e.g. cohesive versus permeable) will be a critical factor for olivine-based CESW applications, as it will significantly impact the dissolution rate by influencing the ambient pore water pH, saturation dynamics, and natural alkalinity generation. Therefore, future field studies should also target different coastal sediment types.

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Section: Availability Of Olivinementioning

confidence: 99%

Review and syntheses: Ocean alkalinity enhancement and carbon dioxide removal through coastal enhanced silicate weathering with olivine

Geerts,

Hylén,

Meysman

2024

Preprint

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“…There are several proposed technological processes of MgO or MgO precursors recovery, e.g. brucite, magnesite or HMCs [6,[22][23][24][25]. Examples for such processes are the NETL (National Energy Technology Laboratory, US) or ÅAU (Åbo Akademi University, Finland) process [12,23].…”

Section: Introductionmentioning

confidence: 99%

Hydrous Carbonate-Containing Brucite (Hcb) in Mgo / Hydromagnesite Blends

German¹,

Winnefeld²,

Lura³

et al. 2023

Preprint

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“…This is the recently favored process for magnesium silicates to produce disordered crystalline structures for mineral carbonation uses (Alex et al, 2016). Olivine and serpentine group minerals are the most appropriate Ca/Mg silicate mineral raw materials for CO2 mineral carbonation, as they are abundant in nature and bind relatively more CO2 per unit mass (Goff et al, 2000). Lizardite, the most common mineral of the serpentine group, is a trioctahedral phyllosilicate type mineral and has the general chemical formula of Mg3Si2O5(OH)4.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Activation of Lizardite by Dry Grinding for Enhanced Mineral Carbonation

Çiftçi

2023

mijst

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Mechanical activation of Ca/Mg silicates by grinding is a pre-treatment of some mineral carbonization processes. In this study, the mechanical activation of lizardite ore from a chromite beneficiation plant waste by grinding in a stirred media mill was studied. For grinding studies, grinding times of 10-20-30 min and stirring speeds of 600-800-1000-1200 rpm were the parameters investigated, while the ball charge rate was 60% and the ore charge rate was kept constant at 40%. This way, the effects of grinding time and stirring speed on particle size distribution and energy consumption were investigated. At the end of the grinding studies, the stirring speed was determined as 1200 rpm, and the grinding time was 10 min for the finer particle size distribution (d10: 2,7 µm, d50: 13,6 µm, d90: 57.6 µm) with less energy consumption (130.4 kWh/ton). FT-IR analyses proved that the samples were dehydroxylated by the milling process. As a result, according to the analysis performed after grinding, it can be said that the finer product obtained can be used in mineral carbonation processes.

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Evaluation of ultramafic deposits in the Eastern United States and Puerto Rico as sources of magnesium for carbon dioxide sequestration

Cited by 17 publications

References 22 publications

Review and syntheses: Ocean alkalinity enhancement and carbon dioxide removal through coastal enhanced silicate weathering with olivine

Review and syntheses: Ocean alkalinity enhancement and carbon dioxide removal through coastal enhanced silicate weathering with olivine

Hydrous Carbonate-Containing Brucite (Hcb) in Mgo / Hydromagnesite Blends

Mechanical Activation of Lizardite by Dry Grinding for Enhanced Mineral Carbonation

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