Mineral carbonation using alkaline waste and byproducts to reduce CO2 emissions in Taiwan

Ho, Hsing Jung; Iizuka, Atsushi; Lee, Cheng‐Han; Chen, Weisheng

doi:10.1007/s10311-022-01518-6

Cited by 20 publications

(1 citation statement)

References 157 publications

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“…Some studies focused on the introduction of CCUS technologies in the cement production stage, summarizing strategies for the separation of CO 2 from flue gas and strategies for clinker substitution [18,19]. Other studies focused on the introduction of CCUS technologies in the concrete production stage, analysing different prospects for the carbonation and utilization of concrete and industrial waste within the concrete composition [20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Strategies for OPC Paste Carbonation: Relationship between Microstructure, Performance and Net CO2 Balance

Silva,

Nogueira,

Bogas

2023

Sustainability

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Carbon capture storage and utilization is the main technology for reducing CO2 emissions, accounting for 56% of the overall reduction required to achieve the carbon neutrality of concrete by 2050. Different strategies have been explored in cement-based materials towards this end, namely, in concrete. However, the impact on carbonated concrete differs depending on the moment at which cementitious material comes into contact with CO2, either in terms of CO2 uptake or in terms of its lifetime performance. This paper presents three leading strategies that rely on the direct carbonation of a cementitious binder to reduce the carbon footprint. For each strategy, the effect of the carbonation process on the kinetics and microstructure of cementitious paste, the estimation of its carbon capture capability and the application feasibility are discussed. Accelerated carbonation curing is one approach widely studied by academics. However, despite some CO2 capture effectiveness, its industrial processing is still a long way off. A second strategy consists of incorporating CO2 during the mixing process, which has been shown to speed up the hardening reactions of cement. However, this effect is of short term and may negatively affect its long-term performance. Finally, the carbonation of hydrated cement waste is shown to be a very promising strategy that enables the recycling of hydrated cement waste as a supplementary cementitious material which also has a potentially high CO2 uptake. The integrated analysis of the three strategies highlights a wide variability in the reduction of CO2 emissions from 1% to 37% in relation to current emissions, where the best result was achieved using carbonated waste (third strategy) in the production of a concrete subjected to carbonation curing (first strategy).

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Section: Introductionmentioning

confidence: 99%

Strategies for OPC Paste Carbonation: Relationship between Microstructure, Performance and Net CO2 Balance

Silva,

Nogueira,

Bogas

2023

Sustainability

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Total Resource Circulation of Desalination Brine: A Review

Lee,

Ho,

Chen

et al. 2024

Advanced Sustainable Systems

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Desalination brine is a concentrated stream that is generated during the desalination process. Brine commonly has high salinity and TDS (total dissolved ions), which contains ions such as Na+, K+, Ca2+, Mg2+, Cl−, SO42−, HCO3−, PO43−, and some critical elements. Currently, the brine treatment mainly applies direct disposal, like surface water discharge, sewer discharge, deep‐well injection, and evaporation ponds. However, these methods can cause harm to marine ecosystems, soil, and groundwater. Therefore, brine can be regarded as a resource to be reutilized. This work then aims to highlight the novel developments of brine application. For example, Na, Ca, and Mg in brine can be employed for carbon capture and utilization with ammonia, amines, and alkaline substances. With slight adjustment, brine can also be directly used as irrigation water, aquaculture water, and the activation of biochar. Furthermore, brine holds a higher concentration of critical elements, which makes many countries and scholars start to conduct element extraction, reducing the amount of ore exploitation. At last, the major obstacles related to these advancements in sustainability, expenses, and technological aspects are outlined, and promising research trends of brine reutilization are also suggested.

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Portlandite wet-synthesis process from phosphogypsum waste using hydroxide medium: application in both CO2 capture and brine water salinity reduction

Bouargane

Biyoune

Pérez-Moreno

et al. 2023

J Mater Cycles Waste Manag

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Mineral carbonation using alkaline waste and byproducts to reduce CO2 emissions in Taiwan

Cited by 20 publications

References 157 publications

Strategies for OPC Paste Carbonation: Relationship between Microstructure, Performance and Net CO2 Balance

Strategies for OPC Paste Carbonation: Relationship between Microstructure, Performance and Net CO2 Balance

Total Resource Circulation of Desalination Brine: A Review

Portlandite wet-synthesis process from phosphogypsum waste using hydroxide medium: application in both CO2 capture and brine water salinity reduction

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