Strategies to accelerate CO2 sequestration of cement-based materials and their application prospects

Wang, Dianchao; Xiao, Jianzhuang

doi:10.1016/j.conbuildmat.2021.125646

Cited by 74 publications

(24 citation statements)

References 125 publications

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“…Based on the current cement consumption level, global cement production may further grow by 12%-23% by 2050 to meet the needs of the rising global population, urbanization and infrastructure developments [90] . Therefore, it is necessary to consider CO 2 emission reduction in the cement industry [92] for the common carbon neutral goal by 2050. The main reactive material of cement is calcium silicate hydrate (C-S-H), which is also suitable for CO 2 mineralization [90,93,94] .…”

Section: Co 2 Mineralization In Cement Industrymentioning

confidence: 99%

Status of CO2 mineralization and its utilization prospects

Wang¹,

Dreisinger²

2022

Miner Miner Mater

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Action is currently being taken globally to mitigate global warming.The objective of reducing CO2 emissions is not a burden for society but is a significant opportunity for evolution in various industries for the sustainable production of energy and the essential minerals, metals, and materials required for modern society. CO2 mineralization is one of the most promising methods to effectively reduce CO2 emissions via the formation of stable mineral carbonates. Accelerated mineral carbonation requires high capital costs for implementation. Accordingly, it has thus far not been economically feasible to carry out accelerated CO2 mineralization alone. Accelerated CO2 mineralization must be combined with other associated technologies to produce high-value products. The technical developments in enhanced metal recovery, nanomaterials, enhanced flotation, H2 production and applications in the cement industry may be suitable options. The utilization and generation of valuable byproducts may determine the economic feasibility of CO2 mineralization processes. The need for CO2 reduction and utilization can contribute to driving the development of many innovative and sustainable technologies for the future benefit of society. The implementation of carbon taxation may also significantly motivate the development of these technologies and their potential application.

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Section: Co 2 Mineralization In Cement Industrymentioning

confidence: 99%

Status of CO2 mineralization and its utilization prospects

Wang¹,

Dreisinger²

2022

Miner Miner Mater

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“…混凝土的碳化反应可吸收水泥煅烧反应释放的 CO 2 ，形成了基于化学反应的碳循环 [48] 。在上述被动碳吸收效应下，通过在水泥生产过程中开展主动的碳捕捉与储存 [96] ，有望构建水泥基材料的负碳排放路径。然而，正常服役的混凝土结构在其生命周期内平均仅实现 17%的化学过程碳吸收 [39] ，但从促进使用阶段碳化出发增加碳吸收，从结构安全耐久角度常是不合理的。混凝土破碎后，比表面积显著增大，其中所含水泥基胶凝材料的 CO 2 吸收速率得到大幅提升 [97] 。然而，废弃混凝土破碎过程本身也需消耗额外能耗，并造成附加碳排放。所幸破碎产生的再生原料可用于混凝土生产，从而减少天然材料开采与生产需求。过去二十余年间，为应对严峻的资源短缺与城市固废消纳问题，再生粗骨料混凝土已形成较为完整的理论、技术体系 [19] ，工程应用已大范围铺开 [98] ；再生细骨料 [99] 、再生粉体 [100,101] 相关研究方兴未艾，结合 3D 打印再生混凝土 [102] 等技术拓宽了应用场景；全再生混凝土的研究正处于起步阶段，再生原料的全组分复掺可提升废弃混凝土的资源化率。再生混凝土带来的废弃物附加值提升，促进了混凝土破碎生产与全产业链推广应用，助推了混凝土材料碳循环的实现。废弃混凝土破碎过程的碳排放与天然骨料生产相近，再生混凝土碳排放较天然混凝土的差异主要在于水泥用量微增、运输距离减少和骨料储存阶段的碳吸收。过去研究多关注前两类因素，得出的再生混凝土碳排放量级与天然混凝土相近，减排效果存在争议 [34,[40][41][42] 。进一步，重点关注再生原料碳吸收效益，可发掘混凝土碳汇潜力，并体现再生混凝土减排优势。在不超过 3 个月的储存时间内，再生原料即可实现 11kg CO 2 /t 的碳吸收，从而减少约 5.5%的混凝土结构生命周期隐含碳排放 [103] ；采用优化的废弃物管理机制可进一步促进再生原料的充分碳化，使水泥煅烧释放 CO 2 的吸收比例提高约 80% [97] ，相当于降低约 20%的混凝土结构隐含碳排放。同时，碳化产物可填充再生骨料附着老砂浆的孔隙，改善骨料品质 [104] ，提升再生骨料混凝土新老砂浆结合界面过渡区的性能 [105] ；碳化还有助于提升再生粉体在混凝土中的胶凝作用 [106,107] 。由此，与碳循环相结合的再生混凝土研发可在结构-环境共生系统中创造双赢。 By briefly reviewing the history of concrete industry, we illustrate the trend of low-carbon transition, for which it is urgently needed to shift the perspective of structural design from centering on human needs to meeting the sustainable needs of the integrated system of concrete structures and environment. Based on the characteristics of carbon emission and uptake of concrete structures, the significance of regulating concrete structures' net embodied carbon emissions for climate change mitigation is clarified.…”

Section: 碳循环技术unclassified

Prospects for low-carbon design theory of concrete structures

Xia¹,

Xiao²,

Li³

et al. 2022

Chin. Sci. Bull.

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Life-cycle based analytical theory of concrete-filled steel tubular structures and its applications Chinese Science Bulletin 65, 3173 (2020); concrete structures, which includes clarifying the carbon emission benchmarks and goals for concrete industry, strengthening the identification and management of failure risks and possible failure consequences under climate change, enriching and improving available low-carbon design technologies, and developing codes and software for integrated low-carbon design.

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“…Sequestration in cement-based materials has also been investigated. 22 Injecting CO 2 into natural gas-containing rock formations is a popular application of CO 2 sequestration, as natural gas molecules are thus displaced by CO 2 , increasing recovery of the natural gas. However, it is important to consider the limited storage capacity, as well as possible leakage of CO 2 , leading to groundwater contamination.…”

Section: Introductionmentioning

confidence: 99%

“…Shales, coals, or saline aquifers are examples of rock formations where CO 2 sequestration is possible. Sequestration in cement-based materials has also been investigated . Injecting CO 2 into natural gas-containing rock formations is a popular application of CO 2 sequestration, as natural gas molecules are thus displaced by CO 2 , increasing recovery of the natural gas.…”

Section: Introductionmentioning

confidence: 99%

New Insights on Catalytic Valorization of Carbon Dioxide by Conventional and Intensified Processes

Olivier

Desgagnés

Mercier

et al. 2023

Ind. Eng. Chem. Res.

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Carbon capture is an emerging technology that is often mentioned as a potential solution to the global warming crisis. However, most of the captured carbon is now treated as waste, discarded, and not used in any meaningful way. On the other hand, from a sustainable development point of view, CO 2 valorization could be a very appealing approach that offers an economic potential when this compound is recycled into valuable chemical products. In this regard, this state-of-the-art review encompasses a wide range of different processes to achieve the conversion of CO 2 into a large variety of products. It does not focus solely on a specific reaction or method, but rather brings different aspects together to provide a far more complete portrait of this emerging subject. Several methods and approaches are discussed, namely thermochemical, electrochemical, photochemical, photoelectrochemical, biochemical, and plasma-assisted conversion. The current state of CO 2 valorization, as well as emerging alternatives and stimulating prospects, was examined, while bearing in mind the realities that limit the application of such technologies. Special emphasis was placed on the optimization of reaction conditions and the development of materials that ensure the best possible production of valuable and environmentally friendly compounds from CO 2 . This review also highlights the challenges related to the application of CO 2 valorization at an industrial scale, which are also important in directing further research in this domain and assessing the prospects of these technologies. Due to the growing number of published papers on the subject, and the limited number of papers offering such a large perspective, we thus believe that this review will be a valuable addition to guide all researchers involved in the field of CO 2 valorization, but also for industrial and political leaders interested in investing in and developing these promising new technologies.

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Strategies to accelerate CO2 sequestration of cement-based materials and their application prospects

Cited by 74 publications

References 125 publications

Status of CO2 mineralization and its utilization prospects

Status of CO2 mineralization and its utilization prospects

Prospects for low-carbon design theory of concrete structures

New Insights on Catalytic Valorization of Carbon Dioxide by Conventional and Intensified Processes

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