Achieving net zero greenhouse gas emissions in the cement industry via value chain mitigation strategies

Miller, Sabbie A.; Habert, Guillaume; Myers, Rupert J.; Harvey, John T.

doi:10.1016/j.oneear.2021.09.011

Cited by 138 publications

(65 citation statements)

References 119 publications

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“…A growing body of evidence has shown the potential for emissions reduction through efforts focusing on the supply side of the cement and concrete cycle, including energy efficiency improvements 7 , 9 , clinker-to-cement ratio reduction 10 , 11 , low-carbon fuel utilization 12 , cement substitution with alternative binders 13 , 14 , carbon capture and storage (CCS) 15 , 16 , and carbon capture and utilization (CCU) 17 . Among these various supply-side measures, industry pledges and policy discussions are particularly dependent on CCS 18 – 20 , even though it belongs to the lowest hierarchy of strategies due to technology lock-in concerns and low resource efficiency 21 . In contrast, an emerging research stream has shown that significant, but largely untapped, opportunities exist on the demand side through more efficient material use 22 – 26 .…”

Section: Introductionmentioning

confidence: 99%

“…However, these studies do not provide a pathway for achieving net-zero emissions by approximately mid-century, an underlying requirement for meeting the 1.5–2 °C climate target 8 . Recent literature reviews summarizing the large body of available evidence suggest the importance of cross-cutting strategies that span the entire cement and concrete cycle 21 , 27 – 29 ; however, relevant empirical analyses remain largely lacking. While several pioneering efforts have been undertaken to fill this gap 6 , 30 , they tend to consider only a limited set of concrete end uses and thus do not capture a large part of concrete flows and stocks.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed model is then used to explore 16 strategies (nine supply-side and seven demand-side interventions) for achieving net-zero emissions by 2050. The principal storyline here focuses on whether it is possible to achieve net-zero emissions across the cement and concrete cycle without relying on CCS, which belongs to the lowest tier of mitigation strategies 21 .…”

Section: Introductionmentioning

confidence: 99%

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Efficient use of cement and concrete to reduce reliance on supply-side technologies for net-zero emissions

et al. 2022

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Decarbonization strategies for the cement and concrete sector have relied heavily on supply-side technologies, including carbon capture and storage (CCS), masking opportunities for demand-side intervention. Here we show that cross-cutting strategies involving both the supply and demand sides can achieve net-zero emissions by 2050 across the entire Japanese cement and concrete cycle without resorting to mass deployment of CCS. Our analysis shows that a series of mitigation efforts on the supply side can reduce 2050 CO2 emissions by up to 80% from baseline levels and that the remaining 20% mitigation gap can be fully bridged by the efficient use of cement and concrete in the built environment. However, this decarbonization pathway is dependent on how CO2 uptake by carbonation and carbon capture and utilization is accounted for in the inventory. Our analysis underscores the importance of including demand-side interventions at the heart of decarbonization strategies and highlights the urgent need to discuss how to account for CO2 uptake in national inventories under the Paris Agreement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficient use of cement and concrete to reduce reliance on supply-side technologies for net-zero emissions

et al. 2022

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“…The amount of CO 2 generated during sintering accounts for approximately 93% of the total emissions during cement manufacturing, where 33% originates from the combustion of fossil fuels and 60% from the decomposition of limestone. The process of limestone decomposition proceeds according to Equation (1) [ 7 , 8 , 9 ]. CaCO 3 + heat → CaO + CO 2 …”

Section: Introductionmentioning

confidence: 99%

Fundamental Studies on CO2 Sequestration of Concrete Slurry Water Using Supercritical CO2

Sim

Ryu

2021

Materials

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To prevent drastic climate change due to global warming, it is necessary to transition to a carbon-neutral society by reducing greenhouse gas emissions in all industrial sectors. This study aims to prepare measures to reduce the greenhouse gas in the cement industry, which is a large source of greenhouse gas emissions. The research uses supercritical CO2 carbonation to develop a carbon utilization fixation technology that uses concrete slurry water generated via concrete production as a new CO2 fixation source. Experiments were conducted using this concrete slurry water and supernatant water under different conditions of temperature (40 and 80 °C), pressure (100 and 150 bar), and reaction time (10 and 30 min). The results showed that reaction for 10 min was sufficient for complete carbonation at a sludge solids content of 5%. However, reaction products of supernatant water could not be identified due to the presence of Ca(HCO3)2 as an aqueous solution, warranting further research.

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“…Reducing the energy intensity of cement production and reducing the volume of CO 2 emissions into the atmosphere may be by improving the production technology [5,6], using alternative fuels [7,8], and capturing and storing carbon [9,10]. However, the most effective way of emissions tumbling in cement production is to reduce the clinker proportion in cement [11,12].…”

mentioning

confidence: 99%

Investigation of the influence of technological factors and compositions of binders on the strength characteristics of blast–furnace cement with magnetized ferromagnetic additives

Sakhno

Yanova

Pischikova

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Cement production is a significant source of carbon dioxide emissions. One of the ways to reduce emissions is to reduce the proportion of clinker in cement by introducing active mineral additives into its composition, particularly granulated blast-furnace slag. One of the ways to increase the activity of such cement is the effect of magnetic fields on the spin multiplicity of the substances involved in the hardening reaction. In this case, the maximum effect is ensured by introducing a magnetized finely dispersed ferromagnetic substance into the cement composition. The activation effect depends on the additive’s adding method to the cement’s composition, the components ratio in the cement, and the cement hardening mode. This work aims to identify the influence of the adding method of the additive, the slag and additive proportion in cement, and the steam curing temperature on the activity effect of the binder. Three groups of studies were carried out to determine the strength characteristics of laboratory samples hardened both in natural conditions and during steaming. In the first group, cement samples have tested containing 40% slag obtained by joint grinding and joint mixing of the additive with cement for 0.5, 1, 2, 4 and 8 minutes. In the second group, samples have tested with the additive amount varied from 0 to 2.5%, and slag amount from 0 to 80%. Finally, cement samples were tested in the third group containing 50% slag and from 0 to 2.5% additive. The samples were steam cured at temperatures ranging from 50 to 90° C and tested one day, 28 and 90 days after steam curing. As a result of the research, it has revealed that to obtain the maximum effect, the additive must be introduced into the cement composition by joint grinding. The factors influencing the activity have been determined. At the same time, the time of joint grinding should ensure uniform mixing of the components and the formation of new surfaces of cement grains in the presence of magnetic fields. Too long joint grinding leads to the loss of the magnetic properties of the addition. It was found that the activation effect from the additive addition increases with an increase in the proportion of slag. In cement without slag, an increase in the additive content leads to a drop in strength. It was revealed that the introduction of magnetized ferromagnetic dust additives into the composition of the SPC makes it possible to reduce the steam curing temperature of products by 20-25° C. Studies have shown that using a finely dispersed ferromagnetic substance as an activating additive can save energy resources and reduce emissions.

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Achieving net zero greenhouse gas emissions in the cement industry via value chain mitigation strategies

Cited by 138 publications

References 119 publications

Efficient use of cement and concrete to reduce reliance on supply-side technologies for net-zero emissions

Efficient use of cement and concrete to reduce reliance on supply-side technologies for net-zero emissions

Fundamental Studies on CO2 Sequestration of Concrete Slurry Water Using Supercritical CO2

Investigation of the influence of technological factors and compositions of binders on the strength characteristics of blast–furnace cement with magnetized ferromagnetic additives

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