Performance evaluation and environment risk assessment of steel slag enhancement for seawater to capture CO2

Li, Hongwei; Zhang, Rongjun; Wang, Tianye; Wu, Yu; Xu, Ruo; Wang, Qiang; Tang, Zhigang

doi:10.1016/j.energy.2021.121861

Cited by 13 publications

(3 citation statements)

References 62 publications

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“…They showed that salinity and CO 2 solubility are inversely related and that the addition of inorganic substances that promote precipitation, such as CaO, can enhance the solubility by up to 79%. One such solution can be the addition of steel slag which has been proven to be quite effective [116]. Usually, such systems operate as full capture, utilization, and sequestration systems and may seem favorable for use in maritime systems; however, further studies are needed in order to determine if seawater can be a viable solution for CO 2 capture.…”

Section: Other Solventsmentioning

confidence: 99%

Solvents for Membrane-Based Post-Combustion CO2 Capture for Potential Application in the Marine Environment

et al. 2022

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Carbon capture on-board ships represents a powerful technological measure in order for the shipping industry to meet the very stringent GHG emission reduction requirements. Operation within the ship environment introduces a number of constraints associated mainly with space, energy supply, and safety which have to be addressed using compact yet efficient solutions. To this end, solvent-based membrane CO2 capture offers several advantages and has the necessary technological maturity for on-board installation. Solvent choice remains a critical issue both for reasons associated with process efficiency as well as on-board safety. In this paper, we present an up-to-date comprehensive review of the different solvents that can be used for post-combustion CO2 capture. Furthermore, we investigated the solvents’ performance as determined by their inherent characteristics, properties, and behavior for a range of operating conditions against the strict shipping requirements. A preliminary qualitative comparative assessment was carried out based on appropriately selected key performance indicators (KPIs) pertinent to the requirements of the shipping industry. The identified solvent classes were compared using the most critical KPIs for system integration with the ship. It was concluded that at present, no solvent category can efficiently address all the requirements of the ship. However, widely used solvents such as secondary amines showed relatively good compatibility with the majority of the introduced KPIs. On the other hand, more recently developed molecules, such as phase change solvents and ionic liquids, can easily prevail over the vast majority of the identified solvents as long as they are brought to the same level of technological maturity with benchmark solvents. Such a conclusion points toward the need for accelerating research on more tailor-made and performance-targeted solvents.

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Section: Other Solventsmentioning

confidence: 99%

Solvents for Membrane-Based Post-Combustion CO2 Capture for Potential Application in the Marine Environment

et al. 2022

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“…Many researchers have previously reported gaseous CO 2 capture and CaCO 3 production techniques. − However, the utilization of CO 2 in atmospheric air for CaCO 3 production has been little reported. Seawater is a well-studied material for CO 2 sequestration because it is economically feasible and contains sufficient Ca 2+ (about 10 mM). − Although a high pH is required for the dissolution of CO 2 , raising the pH of seawater to above 10 causes the precipitation of Mg(OH) 2 as an impurity. , In this study, we conducted CO 2 capture from atmospheric air with a pH below 10 by adding NaOH to seawater and sequestering CO 2 in the form of CaCO 3 . NaOH can be produced by the electrolysis of NaCl obtained from evaporated waste seawater.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric CO₂ Sequestration in Seawater Enhanced by Molluscan Shell Powders

Namikawa,

Suzuki

2024

Environ. Sci. Technol.

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Carbon capture, utilization, and storage (CCUS) are widely recognized as a promising technology for mitigating climate change. CO 2 mineralization using Ca-rich fluids and highconcentration CO 2 gas has been studied extensively. However, few studies have reported CO 2 mineralization with atmospheric CO 2 , owing to the difficulty associated with its low concentration. In seawater, the biomineralization process promotes Ca accumulation and CaCO 3 precipitation, assisted by specific organic matter. In this study, we examined the conversion of atmospheric CO 2 into CaCO 3 in seawater using shell powders (Pinctada fucata, Haliotis discus, Crassostrea gigas, Mizuhopecten yessoensis, Turbo sazae, and Saxidomus purpurata). Among the six species, the shell powder of S. purpurata showed the highest rate of CaCO 3 formation and recovery of CaCO 3 . NaClO treatment test revealed that the organic matter in the shells enhanced the CO 2 mineralization. All materials used in this study, including atmospheric CO 2 , seawater, and shells, are economically feasible for large-scale applications. Using shell powder for CO 2 mineralization in seawater embodies an innovative technological advancement to address climate change.

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“…Anthropogenic carbon dioxide emissions contribute significantly to global warming and climate change, prompting significant international efforts to investigate and develop effective materials for CO 2 capture. [1][2][3][4][5][6] The iron and steel industry contributed approximately 5-7% of global CO 2 emissions, which is the largest consumer of energy. [7][8][9][10] As a result, it is critical to significantly reduce global CO 2 emissions in the future.…”

Section: Introductionmentioning

confidence: 99%

Direct Conversion of Desiliconization Slag to a CaO-Mesoporous Silica Composite for CO<sub>2</sub> Capture: Effect of Acid Dissolution Agent

et al. 2023

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Calcium looping (CaL) utilizing CaO-based adsorbent has been studied to reduce carbon dioxide emissions (CO 2 ). Synthesis of the CaO-based adsorbents from waste slags has captured the interest of the iron and steel industry, which is dealing with intensive amounts of waste slag produced. The drawback of using CaO-based adsorbents is their low regenerative ability during cyclic CO 2 adsorption. In this study, aiming to synthesize a CaO-based adsorbent with better cyclic stability, we used desiliconization slag as a raw material, which is produced during the steel purification process by minimizing the silicon concentration. We synthesized a CaO and mesoporous silica (CaO-MS) composite from desiliconization slag using P123 as an organic template and several organic acids, including formic acid (FA), acetic acid (AA), and citric acid (CA) as dissolution agents. The structure and performance of the adsorbents were investigated using X-ray diffraction analysis (XRD), N 2 adsorption-desorption, transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and thermogravimetric analysis (TG). Compared to the samples synthesized with other organic acids, the slag-derived adsorbent synthesized with acetic acid (DSslag-CaO-MS(AA)) displayed the optimum CO 2 adsorption capacity with 21.0 wt% per mass of adsorbent and the highest stability. The findings demonstrated that the mesoporous structure enhanced the CO 2 adsorption and acetic acid is the best dissolution agent in synthesizing CaO-MS adsorbent by separating the crystalline CaO phase and SiO 2 phase. Environmentally benign and economically viable CaO-based adsorbents synthesized from desiliconization slag can be used for CO 2 capture, particularly in the iron and steel industry.

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Performance evaluation and environment risk assessment of steel slag enhancement for seawater to capture CO2

Cited by 13 publications

References 62 publications

Solvents for Membrane-Based Post-Combustion CO2 Capture for Potential Application in the Marine Environment

Solvents for Membrane-Based Post-Combustion CO2 Capture for Potential Application in the Marine Environment

Atmospheric CO₂ Sequestration in Seawater Enhanced by Molluscan Shell Powders

Direct Conversion of Desiliconization Slag to a CaO-Mesoporous Silica Composite for CO<sub>2</sub> Capture: Effect of Acid Dissolution Agent

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Performance evaluation and environment risk assessment of steel slag enhancement for seawater to capture CO2

Cited by 13 publications

References 62 publications

Solvents for Membrane-Based Post-Combustion CO2 Capture for Potential Application in the Marine Environment

Solvents for Membrane-Based Post-Combustion CO2 Capture for Potential Application in the Marine Environment

Atmospheric CO2 Sequestration in Seawater Enhanced by Molluscan Shell Powders

Direct Conversion of Desiliconization Slag to a CaO-Mesoporous Silica Composite for CO<sub>2</sub> Capture: Effect of Acid Dissolution Agent

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Atmospheric CO₂ Sequestration in Seawater Enhanced by Molluscan Shell Powders