Magnesium oxide-based adsorbents for carbon dioxide capture: Current progress and future opportunities

Ruhaimi, A.H.; Aziz, M.A.A.; Jalil, Aishah Abdul

doi:10.1016/j.jcou.2020.101357

Cited by 73 publications

(45 citation statements)

References 128 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…MgO's unique features such as its basic surface may induce CO 2 uptake performance. MgO possesses an advantage in that it helps in the adsorption process, which occurs when acidic CO 2 reacts with the basic Mg 2+ sites and forms carbonate species such as carbonate and bicarbonate [1]. The Fe oxide mineral is one of the metal-bearing oxides other than Mg and Ca silicates that can undergo a chemical reaction with CO 2 to form stable solid carbonates through the process of mineral carbonation [33][34][35].…”

Section: Carbon Capture and Storage In Cementitious Productmentioning

confidence: 99%

“…Climate change is intensified by the introduction of greenhouse gas (GHG) emissions into the atmosphere through various anthropogenic and natural processes. Global emissions of carbon dioxide (CO 2 ) have been increasing mainly due to industrialization, associated with the combustion of fossil fuel, cement and lime industries that have inflicted the earth [1]. According to International Energy Agency (IEA), 13% reduction in cumulative CO 2 emissions is required by 2050, which is around 6 billion tons of CO 2 removal per year [2].…”

Section: Introductionmentioning

confidence: 99%

“…Included in this concept is the utilization of captured CO 2 as a feedstock for making products in which CO 2 is permanently stored [8]. Reaction of CO 2 with mineral systems, i.e., mineral carbonation or carbon mineralization, has been the key to mineralization technology, which is a method of carbon dioxide removal in the category of CCUS technology [1,7,15]. Mineral carbonation is a process that helps sequester CO 2 permanently in stable carbonates, which can prevent the release of CO 2 back into the atmosphere [9,16].…”

Section: Introductionmentioning

confidence: 99%

“…This silicate mineral that can be found in many ore deposits in the environment is suitable as feedstock for mineral carbonation [27][28][29]. Mg-silicates are ideal minerals as adsorbents for the CO 2 sequestration process because of their low solubility of alkaline earth minerals, which makes them stable on a geological timescale [1,30,31]. While the minerals were often mined as the targeted minerals for carbonation, they were found in mine waste materials as the by-product of mining processes, thereby indicating the potential utilization of mine waste for carbon sequestration [32].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characterization of Gold Mining Waste for Carbon Sequestration and Utilization as Supplementary Cementitious Material

et al. 2021

View full text Add to dashboard Cite

This study aims to identify the potential of gold mining waste for CO2 sequestration and its utilization for carbon storage in cementitious material. Samples of mine waste were identified from a gold mine for mineralogical and chemical composition analysis using X-ray diffractogram and scanning electron microscopy with energy-dispersive X-ray. Mine waste was utilized in a brick-making process as supplementary cementitious material and as an agent for CO2 capture and storage in bricks. Carbonation curing was incorporated in brick fabrication to estimate CO2 uptake of the brick product. Results indicated that the mine wastes were composed of silicate minerals essential for mineral carbonation such as muscovite and illite (major) and chlorite-serpentine, aerinite, albite and stilpnomelane (moderate/minor phases). The mine wastes were identified as belonging to the highly pozzolanic category, which has a great role in improving the strength properties of brick products. Carbonated minerals served as an additional binder that increased the strength of the product. CO2 uptake of the product was between 0.24% and 0.57% for bricks containing 40–60% of gold mine waste, corresponding to 7.2–17.1 g CO2/brick. Greater performance in terms of compressive strength and water adsorption was observed for bricks with 3 h carbonation curing. The carbonation product was evidenced by strong peaks of calcite and reduced peaks for calcium hydroxide from XRD analysis and was supported by a densified and crystalline microstructure of materials. It has been demonstrated that gold mine waste is a potential feedstock for mineral carbonation, and its utilization for permanent carbon storage in brick making is in line with the concept of CCUS for environmental sustainability.

show abstract

Section: Carbon Capture and Storage In Cementitious Productmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of Gold Mining Waste for Carbon Sequestration and Utilization as Supplementary Cementitious Material

et al. 2021

View full text Add to dashboard Cite

show abstract

“…CaO-based sorbents are by far the most widespread in terms of research literature, much of which is focused on the optimization of the archetypal CaO on an industrial process scale; for summaries of this work, we refer to a number of review papers [40]- [50] and also to papers covering specifically Mg- [51], [52] and Li-based [53], [54] sorbents. In contrast, this review will investigate questions at a much more fundamental level, including the influence of material structure, ionic conduction and particle morphology on CO2 absorption, and how the structural and operando analysis of a wide range of Ca, Mg and Li containing materials reveals trends tying performance to these chemo-physical properties.…”

Section: Introduction and Objectives -Co2 Capture By Metal Oxidesmentioning

confidence: 99%

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Dunstan¹,

Donat²,

Bork³

et al. 2021

Preprint

View full text Add to dashboard Cite

Carbon dioxide capture and mitigation forms a key part of the technological response to combat climate change and reduce CO2 emissions. Solid materials capable of reversibly absorbing CO2 have been the focus of intense research for the past two decades, promising stability and low energy costs to implement and operate compared to the more widely used liquid amines. In this Review, we explore the fundamental aspects underpinning solid CO2 sorbents based on alkali and alkaline earth metal oxides operating at mid- to high temperature: how their structure, chemical composition and morphology impact their performance and long-term use. Various optimization strategies are outlined to improve upon the most promising materials, and we combine recent advances across disparate scientific disciplines including materials discovery, synthesis, and in situ characterization to present a coherent understanding of the mechanisms of CO2 absorption both at surfaces and within solid materials.

show abstract

Unravelling the Mechanism of Intermediate‐Temperature CO₂ Interaction with Molten‐NaNO₃‐Salt‐Promoted MgO

et al. 2021

View full text Add to dashboard Cite

The optimization of MgO‐based adsorbents as advanced CO2‐capture materials is predominantly focused on their molten‐salt modification, for which theoretical and experimental contributions provide great insights for their high CO2‐capture performance. The underlying mechanism of the promotion effect of the molten salt on CO2 capture, however, is a topic of controversy. Herein, advanced experimental characterization techniques, including in situ environmental transmission electron microscopy (eTEM) and CO2 chemisorption by diffuse‐reflectance infrared Fourier transform spectroscopy (DRIFTS), transient 18O‐isotopic exchange, and density functional theory (DFT), are employed to elucidate the mechanism of the CO2 interaction with molten‐salt‐modified MgO in the 250–400 °C range. Herein, eTEM studies using low (2–3 mbar) and high (700 mbar) CO2 pressures illustrate the dynamic evolution of the molten NaNO3 salt promoted and unpromoted MgO carbonation with high magnification (<50 nm). The formation of 18O‐NaNO3 (use of 18O2) and C16O18O following CO2 interaction, verifies the proposed reaction path: conversion of NO3− (NO3− → NO2+ + O2–), adsorption of NO2+ on MgO with significant weakening of CO2 adsorption strength, and formation of [Mg2+… O2−] ion pairs preventing the development of an impermeable MgCO3 shell, which largely increases the rate of bulk MgO carbonation.

show abstract

Magnesium oxide-based adsorbents for carbon dioxide capture: Current progress and future opportunities

Cited by 73 publications

References 128 publications

Characterization of Gold Mining Waste for Carbon Sequestration and Utilization as Supplementary Cementitious Material

Characterization of Gold Mining Waste for Carbon Sequestration and Utilization as Supplementary Cementitious Material

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Unravelling the Mechanism of Intermediate‐Temperature CO₂ Interaction with Molten‐NaNO₃‐Salt‐Promoted MgO

Contact Info

Product

Resources

About

Magnesium oxide-based adsorbents for carbon dioxide capture: Current progress and future opportunities

Cited by 73 publications

References 128 publications

Characterization of Gold Mining Waste for Carbon Sequestration and Utilization as Supplementary Cementitious Material

Characterization of Gold Mining Waste for Carbon Sequestration and Utilization as Supplementary Cementitious Material

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Unravelling the Mechanism of Intermediate‐Temperature CO2 Interaction with Molten‐NaNO3‐Salt‐Promoted MgO

Contact Info

Product

Resources

About

Unravelling the Mechanism of Intermediate‐Temperature CO₂ Interaction with Molten‐NaNO₃‐Salt‐Promoted MgO