CO₂-removal News

Peer-reviewed Publications

Poeplau et al. (2024): Towards an ecosystem capacity to stabilise organic carbon in soils

Christopher Poeplau, Rene Dechow, Neha Begill, Axel Don IN: Global Change Biology, https://doi.org/10.1111/gcb.17453

Soil organic carbon (SOC) accrual, and particularly the formation of fine fraction carbon (OCfine), has a large potential to act as sink for atmospheric CO2. For reliable estimates of this potential and efficient policy advice, the major limiting factors for OCfine accrual need to be understood. The upper boundary of the correlation between fine mineral particles (silt + clay) and OCfine is widely used to estimate the maximum mineralogical capacity of soils to store OCfine, suggesting that mineral surfaces get C saturated. Using a dataset covering the temperate zone and partly other climates on OCfine contents and a SOC turnover model, the authors provide two independent lines of evidence, that this empirical upper boundary does not indicate C saturation. 

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Peer-reviewed Publications

Xu et al. (2024): Comprehensive performance evaluation of HVAC systems integrated with direct air capture of CO2 in various climate zones

Youmin Xu, Xu Han, Xiangkun Elvis Cao IN: Building and Environment, 266, 112048, https://doi.org/10.1016/j.buildenv.2024.112048

This study presents a comprehensive performance evaluation of integrating DAC in HVAC systems, which can reduce indoor CO2 concentration and improve energy efficiency of HVAC systems. The DAC equipment is modeled in Modelica based on isotherm and thermodynamic equations, and pressure drop curves of the CO2 sorbent described in literature. The model is validated with data from the literature, and then integrated into a typical HVAC system available in Modelica Buildings library.

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Peer-reviewed Publications

Titus et al. (2024): Techno-economic analysis of geothermal combined with direct and biomass-based carbon dioxide removal for high-temperature hydrothermal systems

K.A. Titus, David Dempsey, Rebecca A.M. Peer, Rosalind Archer IN: Geothermics, 125, https://doi.org/10.1016/j.geothermics.2024.103159

Here, the authors present a techno-economic comparison of renewable electricity generation coupled with either BECCS or DACCS at high-temperature, low-gas hydrothermal systems. They use a systems model that quantifies energy, carbon and financial flows through a generic hybrid power plant.

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Peer-reviewed Publications

Nature – Cavan et al. (2024): Antarctic krill sequester similar amounts of carbon to key coastal blue carbon habitats

E. L. Cavan, N. Mackay, S. L. Hill, A. Atkinson, A. Belcher, A. Visser IN: Nature Communications, 15, https://doi.org/10.1038/s41467-024-52135-6

Here the authors show that just a single pelagic harvested species, Antarctic krill, sequesters a similar amount of carbon through its sinking faecal pellets as marshes, mangroves and seagrass. Antarctic krill are being impacted by rapid polar climate change and an expanding fishery, thus krill populations and their habitat warrant protection to preserve this valuable carbon sink.

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Peer-reviewed Publications

Feng et al. (2024): Understanding the mechanisms and potential pathways of soil carbon sequestration from the biogeochemistry perspective

Xiaojuan Feng, Guohua Dai, Ting Liu, Juan Jia, Erxiong Zhu, Chengzhu Liu, Yunpeng Zhao, Ya Wang, Enze Kang, Jun Xiao, Wei Li IN: Science China Earth Sciences, 2024, https://doi.org/10.1007/s11430-024-1359-9

This paper reviews recent progress in the related domestic and international research and provides an overview of the key processes and mechanisms of soil carbon sequestration. The main pathways for enhancing soil carbon sequestration (including plant inputs, mineral protection, microbial transformation, and rock weathering) are summarized. The paper also discusses and synthesizes how advanced biogeochemical methods and technologies may be employed to explore soil carbon sequestration mechanisms and potentials.

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Peer-reviewed Publications

Weimann & Bentsen (2024): Potential for carbon dioxide removal of carbon capture and storage on biomass-fired combined heat and power production

Gertrud Græsbøll Weimann, Niclas Scott Bentsen IN: Global Change Biology Bioenergy, 16, https://doi.org/10.1111/gcbb.13184

The authors present a case study of Bioenergy with Carbon Capture and Storage (BECCS) by installing CCS at a biomass-fired CHP plant and the aim is to quantify the CDR potential and carbon dynamics of the BECCS system. Moreover, the study aims to quantify the emissions related to capturing and store CO2.

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Peer-reviewed Publications

Presty et al. (2024): Mapping the landscape of carbon dioxide removal research: a bibliometric analysis

Romain Presty, Olivier Massol, Emma Jagu, Pascal da Costa IN: Environmental Research Letters, 19, https://doi.org/10.1088/1748-9326/ad71e0

This study conducts an updated analysis of the international research effort on CDR from 2012 to 2023, examining 7893 publications using bibliometric techniques. The authors focus on the geographic distribution of technology-specific research and the funding driving this research.

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Peer-reviewed Publications

Johnson et al. (2024): Can coastal and marine carbon dioxide removal help to close the emissions gap? Scientific, legal, economic, and governance considerations

Martin Johnson, Erik van Doorn, Nathalie Hilmi, Christa Marandino, Natasha McDonald, Helmuth Thomas, Denis Allemand, L. Delvasto Algarin, Lara Lebleu, David T. Ho, Mary Oloyede, Alain Safa, Peter Swarzenski IN: Elementa: Science of the Anthropocene, 12, https://doi.org/10.1525/elementa.2023.00071

In this Policy Bridge, zhe auhtors present the key issues regarding the safety, efficacy, funding, and governance of coastal and marine systems in support of climate change mitigation. Novel insights into the likely potential of these systems for use in mitigating excess carbon dioxide emissions are presented.

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Peer-reviewed Publications

Nayab et al. (2024): Review Analysis on Scalability of Carbon Removal Methods and Regulatory Framework for Carbon Management for Companies that sell materials to remove CO2

Tooba Nayab, Talal Ahmed, Devindi Wijekoon IN: Journal of Applied Geosciences and Engeneering, 3, https://doi.org/10.37905/jage.v3i1.25695

This article provides a comprehensive overview of various carbon capture and sequestration (CCS) technologies and approaches aimed at reducing atmospheric carbon dioxide (CO2) concentrations. It evaluates the effectiveness, costs, and potential scalability of different methods proposed by companies and research organizations worldwide. The article also examines the costs associated with these technologies and their capacity to remove significant amounts of CO2 from the atmosphere. Furthermore, it explores future pathways and frameworks for achieving gigaton-scale carbon dioxide removal, emphasizing the importance of interdisciplinary collaboration and technological innovation in addressing the urgent challenge of climate change.

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Peer-reviewed Publications

Park et al. (2024): Harnessing green tide Ulva biomass for carbon dioxide sequestration

Jihae Park, Hojun Lee, Jonas De Saeger, Stephen Depuydt, Jana Asselman, Colin Janssen, Philippe M. Heynderickx, Di Wu, Frederik Ronsse, Filip M. G. Tack, Masanori Hiraoka, Lalit K. Pandey, Ondrej Mašek, Yung Hung, Taejun Han IN: Reviews in Environmental Science and Bio/Technology,
https://doi.org/10.1007/s11157-024-09705-3

This review explores the potential repurposing of harmful Ulva blooms for carbon sequestration, addressing the critical global issue of CO2 emission. The authors conducted a comprehensive literature review and examined the conversion of shoreline Ulva biomass into biochar through pyrolysis, a process that can be implemented directly at biorefineries. This approach not only facilitates carbon sequestration but also mitigates greenhouse gas emissions and enhances soil quality through soil amendments.

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