CO2-removal News

Peer-reviewed Publications

Zhao et al. (2025): Is the topsoil carbon sequestration potential underestimated of agricultural soils under best management?

Zheng Zhao, Tong Li, Kun Cheng, Genxing Pan IN: Soil and Tillage Research, 250, https://doi.org/10.1016/j.still.2025.106528

When estimating changes in soil organic carbon (SOC) stock under best management practices (BMPs), a default soil depth is often used without considering that BMPs may alter the topsoil depth (through volume expansion in line with the changes in bulk density), potentially leading to an underestimation of C sequestration. To achieve a more robust estimate of SOC stock change, it is necessary to rectify soil depth.

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Reports

Böttcher et al. (2025): Scientific Support for the Design of a Certification Framework for Carbon Dioxide Removals in the EU

Hannes Böttcher, Felix Fallasch, Nils Meyer-Ohlendorf, German Environment Agency: Dessau-Roßlau, 2025

This report summarizes the results of the research project „Scientific support for the design of an EU Carbon Removal Certification Framework“ (CRCF) that provided support to national policy makers during the negotiation process and pursued the following objectives. 

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Peer-reviewed Publications

Antonopoulou  et al. (2025): Accelerated carbonate weathering by immobilized recombinant carbonic anhydrase

Io Antonopoulou, Ayanne de Oliveira Maciel, Marikagiusy Di Giacomo, Maria Elena Russo, Ulrika Rova, Paul Christakopoulos, Piero Salatino, Antonio Marzocchella IN: Jpournal of CO2 Utilization, 94, https://doi.org/10.1016/j.jcou.2025.103050

CO2 absorption in aqueous alkaline solutions promoted by carbonic anhydrase (CA) has received increased attention as a solution for post-combustion CO2 capture. In particular, accelerated weathering has emerged as an alternative approach for CO2 capture, mimicking nature’s way to sequestrate CO2. In this study, an evolved CA from Desulfovibrio vulgaris was immobilized on magnetic nanoparticles (MNPs) offering a promising solution for the effective enzyme separation and recovery from complex and heterogeneous reaction media. As a following step, MNPs-DvCA8.0 were applied as promoter in the accelerated weathering of insoluble lime mud, originating as a residue from a paper and pulp industry.

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Peer-reviewed Publications

Nature – Liu et al. (2025): Unprotected carbon dominates decadal soil carbon increase

Minglong Liu, Shilu Zheng, Elise Pendall, Pete Smith, Jiajia Liu, Jinquan Li, Changming Fang, Bo Li, Ming Nie IN: Nature Communications, 16, https://doi.org/10.1038/s41467-025-57354-z

Changes in the distribution of soil organic carbon (SOC) fractions – particulate organic carbon (POC; unprotected carbon) vs. mineral-associated organic carbon (MAOC; protected carbon) – affect SOC storage and stability. Here, the authors compile a SOC fraction dataset from 7219 soil samples across six continents.

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Peer-reviewed Publications

Crîstiu et al. (2025): Strategic Design and Multiperiod Optimization under Uncertainty of Solid Sorbent Direct Air Capture Supply Chains in EuropeClick to copy article link

Daniel Crîstiu, Fengqi You, Federico d’Amore, Fabrizio Bezzo IN: Industrial & Engineering Chemistry Research, 2025, https://doi.org/10.1021/acs.iecr.4c04040

This study develops a multiperiod mixed-integer linear programming model for strategic planning of direct air capture (DAC) supply chains across Europe aiming at minimizing overall costs under uncertainty. The optimization considers uncertainty in key parameters to ensure resilient decision-making. The model incorporates the influence of ambient air conditions on DAC performance, with temperature and humidity impacting productivity and energy consumption. Country-specific energy costs and greenhouse gas emission factors are accounted for, impacting the net cost of CO2 removal.

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Peer-reviewed Publications

Akaya et al. (2025): Amine-Functionalized Cellulose as Promising Materials for Direct CO2 Capture: A Review

Hicham Akaya, Soukaina Lamnini, Houssine Sehaqui, Johan Jacquemin IN: ACS Applied Materials & Interfaces, https://doi.org/10.1021/acsami.4c20801

Herein, the potential use of amine-functionalized cellulose as a low-cost and sustainable sorbent for CO2 capture is reviewed. This literature analysis specifically highlights various advanced preparation methods used to synthesize functionalized cellulose supports with an enhanced affinity for the sorption of CO2 molecules.

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Peer-reviewed Publications

Ye et al. (2025): Review on in-situ CO2 mineralization sequestration: mechanistic understanding and research frontiers

Hang Ye, Qi Liu, Qi Bao, Zhanpeng Wang, Yan Xie, Tiong Michelle, Wentao Zhao, Chenggang Xian IN:  
International Journal of Coal Science & Technology, https://doi.org/10.1007/s40789-025-00755-8

In-situ CO2 mineralization sequestration, compared to conventional geological storage methods such as depleted oil and gas reservoirs, unmineable coal seams, and deep saline aquifers, offers the advantage of permanent immobilization of injected carbon. However, uncertainties persist regarding the characteristics of geochemical interactions under reservoir pore conditions, as well as the kinetic mechanisms of mineralization reactions. Additionally, geochemical reactions may lead to solid particle transport and deposition, potentially causing pore throat occlusion. Pilot projects in Iceland and the United States have demonstrated the feasibility of this technology, but the field remains in the early deployment stage. In this review, the mechanisms of in-situ mineralization have been elucidated, the primary factors influencing the reaction kinetics have been discussed, and the current research status in this field has been summarized.

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Peer-reviewed Publications

Wang et al. (2025): The Carbon Sequestration Potential of Skyscraper Greenery: A Bibliometric Review (2003–2023)

Mo Wang, Haoyu Xu, Jiayu Zhao, Chuanhao Sun, Yongqi Liu, Jianjun Li IN: Sustainability, https://doi.org/10.3390/su17051774

This study provides a comprehensive bibliometric analysis of skyscraper greenery research from 2003 to 2023, employing advanced tools such as CiteSpace and Bibliometrix to assess publication trends, elucidate key research themes, and identify prevailing knowledge gaps. The findings underscore the environmental benefits of skyscraper greenery, including its role in alleviating the urban heat island effect, improving air quality, and enhancing urban biodiversity. Additionally, economic advantages, such as reductions in energy consumption and operational costs, further highlight its multifaceted utility. Carbon sequestration within skyscraper greenery primarily occurs through vegetation’s photosynthetic processes, which are influenced by plant species, substrate composition, and system design.

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Peer-reviewed Publications

Verma et al. (2025): Modeling the Impact of Direct Air Capture on Forest Biomass and Population Dynamics

Priya Verma, Jasmeet Kaur, Maninder Singh Arora, Muhammad Mubashar Dogar, Sanju Purohit IN: Earth Systems and Environment, https://doi.org/10.1007/s41748-025-00599-x

This study presents a novel mathematical model that integrates DAC with human population, forest biomass, atmospheric temperature and concentration of CO2. The model system has four non-negative equilibria, out of which, three are boundary equilibria and one is biologically feasible positive equilibrium. The stability of the system’s positive equilibrium is established through Lyapunov’s direct method. The stability conditions demonstrate that CO2 depletion rate via DAC has a stabilizing effect on the climate system, whereas the anthropogenic emission rate has destabilizing impact.

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Peer-reviewed Publications

Helmrich et al. (2025): Reactive transport simulation of organic and inorganic carbon cycling following carbon dioxide sorption onto soil amendments in drylands

 Stefanie Helmrich, Alexandra Jo Ringsby, Kate Maher IN: Frontiers in Climate Change, doi: 10.3389/fclim.2025.1505472

Drylands cover approximately 45 % of the global land area and are threatened by soil degradation, necessitating the deployment of CDR methods for drylands that also promote soil health. Soil amendments with high CO2 sorption capacity, such as biochar, could provide CDR potential and soil health benefits in drylands provided they do not negatively impact the large inorganic carbon pools typical of dryland soils. The dynamics of soil CO2 are therefore critical for assessing the response of dryland systems to sorbing amendments. To assess the soil response to CO2 sorption, we developed a 1D reactive transport model of unsaturated soils in equilibrium with dissolved inorganic carbon and calcite under varying soil respiration rates and soil amendment application conditions.

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