CO2-removal news

Nature – Edelenbosch et al. (2024): Reducing sectoral hard-to-abate emissions to limit reliance on carbon dioxide removal

Oreane Y. Edelenbosch, Andries F. Hof, Maarten van den Berg, Harmen Sytze de Boer, Hsing-Hsuan Chen, Vassilis Daioglou, Mark M. Dekker, Jonathan C. Doelman, Michel G. J. den Elzen, Mathijs Harmsen, Stratos Mikropoulos, Mariësse A. E. van Sluisveld, Elke Stehfest, Isabela S. Tagomori, Willem-Jan van Zeist, Detlef P. van Vuuren IN: Nature Climate Change, https://doi.org/10.1038/s41558-024-02025-y

To reach net-zero greenhouse gas targets, carbon dioxide removal (CDR) technologies are required to compensate for residual emissions in the hard-to-abate sectors. However, dependencies on CDR technologies involve environmental, technical and social risks, particularly related to increased land requirements for afforestation and bioenergy crops. Here, using scenarios consistent with the 1.5 °C target, the authors show that demand and technological interventions can substantially lower emission levels in four hard-to-abate sectors (industry, agriculture, buildings and transport) and reduce reliance on the use of bioenergy with carbon capture and storage. 

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Terlouw et al. (2024): Assessment of Potential and Techno-Economic Performance of Solid Sorbent Direct Air Capture with CO2 Storage in Europe

Tom Terlouw, Daniel Pokras, Viola Becattini, Marco Mazzotti IN: Environmental Science & Technology, https://doi.org/10.1021/acs.est.3c10041

Here, a geospatial analysis of the techno-economic performance of large-scale DACCS deployment in Europe is presented using two performance indicators: CDR costs and potential. Different low-temperature heat DACCS configurations are considered, i.e., coupled to the national power grid, using waste heat and powered by curtailed electricity.

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Honvault et al. (2024): Additive effects of basalt enhanced weathering and biochar co-application on carbon sequestration, soil nutrient status and plant performance in a mesocosm experiment

Nicolas Honvault, Marie-Laure Tiouchichine, Joana Sauze, Clément Piel, Damien Landais, Sébastien Devidal, Emmanuel Gritti, Delphine Bosch, Alexandru Milcu IN: Applied Geochemistry 169, 106054, https://doi.org/10.1016/j.apgeochem.2024.106054

Co-deployment of a portfolio of carbon removal technologies is anticipated in order to remove several gigatons of carbon dioxide from the atmosphere and meet climate targets. However, co-application effects between carbon removal technologies have rarely been examined, despite multiple recent perspectives suggesting potential synergies between basalt enhanced weathering and biochar application. To study the co-application effects of basalt for enhanced weathering and biochar on carbon sequestration, along with related co-benefits and risks, the authors conducted a fully replicated factorial mesocosm experiment with wheat. 

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Nature – Li et al. (2024): Capturing carbon dioxide from air with charged-sorbents

Huaiguang Li, Mary E. Zick, Teedhat Trisukhon, Matteo Signorile, Xinyu Liu, Helen Eastmond, Shivani Sharma, Tristan L. Spreng, Jack Taylor, Jamie W. Gittins, Cavan Farrow, S. Alexandra Lim, Valentina Crocellà, Phillip J. Milner, Alexander C. Forse IN: Nature, https://doi.org/10.1038/s41586-024-07449-2

In this work, the authors introduce a new class of designer sorbent materials known as ‘charged-sorbents’. These materials are prepared through a battery-like charging process that accumulates ions in the pores of low-cost activated carbons, with the inserted ions then serving as sites for carbon dioxide adsorption. They use our charging process to accumulate reactive hydroxide ions in the pores of a carbon electrode, and find that the resulting sorbent material can rapidly capture carbon dioxide from ambient air by means of (bi)carbonate formation. 

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Jiang et al. (2024): Sponge iron-coupled biochar solution can achieve the synergistic augmentation of carbon sequestration, carbon sink capacity, and denitrification in ecological ditches

Bi–Ni Jiang, Ying–Ying Zhang, Yan Wang, Hai–qin Liu, Qing Zhou, Yi–Jing Yang, Zhi–Yong Zhang, Yu–Li Yang, Wen–jing Guo, Hai–Liang Song IN: Chemical Engineering Journal, 493, 152496, https://doi.org/10.1016/j.cej.2024.152496

Zero-waste biochar, a negative-carbon technology, remains contentious regarding C sequestration. Iron (Fe) enhances long-term organic carbon (OC) preservation, but the cascading effects of Fe-biochar interactions on the promotion of C accumulation are unclear in eco-ditches. In this paper, the authors fill these research gaps and employ sponge iron (s-ZVI) and biochar coupling (Fe-C) to enhance the iron gate C protection in eco-ditches.

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Salvador & Doong (2024): Simultaneous achievement of energy recovery and carbon sequestration through municipal solid waste management: A review

Ruben W. Salvador, Ruey-An Doong IN: Chemosphere, 361, 142478, https://doi.org/10.1016/j.chemosphere.2024.142478

With escalating global waste generation, there is an untapped opportunity to integrate carbon dioxide removal (CDR) technologies into existing municipal solid waste (MSW) management processes. This review explores current research on utilizing MSW for CDR, emphasizing its potential for both energy generation and carbon sequestration. The investigation covers three waste management practices: landfilling, waste-to-energy (WtE), and biochar production, revealing two paths for carbon sequestration. First, MSW serves as a feedstock in bioenergy with carbon capture and storage (BECCS), acting as a carbon-neutral resource that avoids fossil fuel and energy crop use, reducing GHG emissions and generating value through energy production. Second, direct storage of organic MSW and its derivatives, like biochar, in various carbon sinks allows for extended sequestration, offering a comprehensive approach to address the challenges of waste management and climate change mitigation.

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Salas et al. (2024): Life cycle assessment of bioenergy with carbon capture and storage: A review

D. A. Salas, A. J. Boero, A. D. Ramirez IN: Renewable and Sustainable Energy Reviews 199, 114458, https://doi.org/10.1016/j.rser.2024.114458

This research aims to explore the current evidence on the sustainability of Bioenergy with Carbon Capture and Storage under a life cycle approach and to understand how research on this topic has evolved in the last decade. A systematic literature review was performed, and the main focus was identifying methodological shortcomings and analysing Global Warming Potential results. Forty-seven studies were selected for in-depth revision.

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Sugiyama et al. (2024): Residual emissions and carbon removal towards Japan’s net-zero goal: a multi-model analysis

Masahiro Sugiyama, Shinichiro Fujimori, Kenichi Wada, Etsushi Kato, Yuhji Matsuo, Osamu Nishiura, Ken Oshiro Takashi Otsuki IN: Environmental Research Communications, 6, 5, DOI 10.1088/2515-7620/ad4af2

The authors study Japan’s net-zero emissions target by 2050 in a multi-model framework, focusing on residual emissions and carbon dioxide removal (CDR). Four energy-economic and integrated assessment models show similar but stronger strategies for the net-zero target, compared to the previous, low-carbon policy target (80% emissions reduction).

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Nature – Li et al. (2024): Solar thermal energy-assisted direct capture of CO2 from ambient air for methanol synthesis

Shuangjun Li, Runkai Chen, Junyao Wang, Shuai Deng, Hui Zhou, Mengxiang Fang, Huiyan Zhang, Xiangzhou Yuan IN: npj Materials Sustainability 2, 11, https://doi.org/10.1038/s44296-024-00014-y

Solar thermal energy-assisted direct air capture is widely considered as a novel carbon-negative technical route, innovatively enabling an effective removal of CO2 directly from ambient air. Here, an advanced concept is introduced that involves the conversion of CO2 captured by the solar thermal energy-assisted DAC into liquid methanol, simultaneously mitigating climate change and supplying green chemicals.

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Satter et al. (2024): Reactive direct air capture of CO2 to C–C coupled products using multifunctional materials

Shazia Sharmin Satter, Johnny Saavedra Lopez, Michael L. Hubbard, Yuan Jiang, Robert A. Dagle, Jotheeswari Kothandaraman IN: Green Chemistry, https://doi.org/10.1039/D4GC01244E

Current direct air capture approaches require a significant amount of energy for heating CO2-sorbed materials for regeneration and for compressing CO2 for transportation purposes. Rationally designing materials offering both capture and conversion functionalities could enable more energy and cost-efficient DAC and conversion. A single sorbent-catalytic (non-noble metal) material for the Integrated Direct Air Capture and CATalytic (iDAC-CAT) conversion of captured CO2 into value-added products was developed.

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