Monat: Mai 2023

Peer-reviewed Publications

Mu et al. (2023): Considerations for hypothetical carbon dioxide removal via alkalinity addition in the Amazon River watershed

Linquan Mu, Jaime B. Palter, Hongjie Wang IN: Biogeosciences, 20, 1963–1977, https://doi.org/10.5194/bg-20-1963-2023

The authors conduct a sensitivity analysis of hypothetical ocean alkalinity enhancement (OAE) via quicklime addition in the Amazon River watershed, examining the response of carbonate chemistry and air–sea carbon dioxide flux to the alkalinity addition. Through a series of sensitivity tests, they show that the detectability of the OAE-induced alkalinity increment depends on the perturbation strength (or size of the alkalinity addition, ΔTA) and the number of samples: there is a 90 % chance to meet a minimum detectability requirement with ΔTA>15 µmol kg−1 and sample size >40, given background variability of 15–30 µmol kg−1.

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Peer-reviewed Publications

Unnikrishnan & Bala (2023): A comparison of the climate and carbon cycle effects of carbon removal by afforestation and an equivalent reduction in fossil fuel emissions

Koramanghat Unnikrishnan Jayakrishnan & Govindasamy Bala IN: Biogeosciences, 20, 1863–1877, https://doi.org/10.5194/bg-20-1863-2023

In this paper, the authors compare the climate and carbon cycle consequences of carbon removal by afforestation and an equivalent fossil fuel emission reduction using simulations from an intermediate complexity Earth system model. They performed two major sets of idealized simulations in which fossil fuel emissions follow extended Shared Socioeconomic Pathway (SSP) scenarios (SSP2-4.5, 3-7.0, and 5-8.5), and equal amounts of carbon are removed by afforestation in one set and by a reduction in fossil fuel emissions in another set.

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Media

A Powerful Climate Solution Just Below the Ocean’s Surface

by Tatiana Schlossberg on The New York Times, May 24, 2023

„Restoring seagrass meadows is one tool that coastal communities can use to address climate change, both by capturing emissions and mitigating their effects. They can bolster the coastlines, break the force of hurtling waves, provide housing for fish, shellfish, and migrating birds, clean the water, store as much as 5 percent of the world’s carbon dioxide, and pump oxygen into the ocean, in part making it possible for life on Earth as we know it.“

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Peer-reviewed Publications

Pereira & Gamboa (2023): In situ carbon storage potential in a buried volcano

Ricardo Pereira, Davide Gamboa IN: Geology, https://doi.org/10.1130/G50965.1

In situ mineral carbonation in porous and permeable mafic and ultramafic volcanic rocks is proposed to be a promising process that can contribute toward safe and permanent CO2 sequestration. Here,the authors investigated a partially buried Late Cretaceous composite volcano located offshore the central West Iberian margin as a proxy for potential in situ mineral carbonation in volcanic edifices on continental margins worldwide. Based on seismic data, geochemistry, and petrophysical properties, deterministic scenarios for permanent carbon storage were estimated.

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Events

Webinar: The value of Research, Development & Demonstration in the Commercial Deployment of CCS

Wed, Jun 7, 2023 4:00 PM – 5:00 PM CEST by IEAGHG

The aim of the webinar is to describe some of the R&D conducted and its value to commercial deployment of CCS. SINTEFF, TERC and TNO will inform the wider CCS community on how their CCS research activities give value to large-scale trials and ultimately translates to commercial deployment of CCS projects around the world. Practical examples of some of the studies conducted and their impact on large scale CCS projects will be described.

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Peer-reviewed Publications

Xiang et al. (2023): Synthesis of stable single-crystalline carbon dioxide clathrate powder by pressure swing crystallization

Zhiling Xiang, Congyan Liu, Chunhui Chen, Xin Xiao, Thien S. Nguyen, Cafer T. Yavuz, Qiang Xu, Bo Liu IN: Cell Reports Physical Science 4, 101383, https://doi.org/10.1016/j.xcrp.2023.101383

Here, the authors report the pressure swing crystallization of CO2 in a single-crystalline guanidinium sulfate-based clathrate salt under practical conditions of 52 kPa and 298 K, with a high CO2 density (0.252 g cm−3) and capacity (17 wt %). The captured CO2 is released as a pure stream through moderate means of pressure or temperature stimulation, all while the desorbed Gua2SO4 is ready for another cycle. The clathrate is selective exclusively to CO2 even in the presence of common flue gas components, such as water vapor and N2, owing to the specific electrostatic interaction between the CO2 and guanidinium cations. The mechanism unraveled through single-crystal studies is distinctively different from physisorption or chemisorption, opening up a promising venue for future carbon capture and storage technologies through rapid CO2 solidification using an abundant salt.

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Events

Climeworks Direct Air Capture Summit 2023

June 6, 2023, 08 am -7 pm CET, by climeworks, hybrid: in Zurich, Switzerland and online

Since 2020, Climeworks Direct Air Capture Summit has been a unique platform that brings together the carbon removal industry’s key players. Featuring technology, business, climate science and policy experts, our full-day event aims to spark insightful discussions and inspire new partnerships to fulfil the potential of direct air capture and carbon removal in the fight against global warming. Inspire, connect, act – these are the core pillars of the Direct Air Capture Summit and through which we want to drive meaningful progress in the scale up of the carbon removal industry.

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Peer-reviewed Publications

La Plante et al. (2023): Electrolytic Seawater Mineralization and the Mass Balances That Demonstrate Carbon Dioxide Removal

Erika Callagon La Plante, Xin Chen, Steven Bustillos, Arnaud Bouissonnie, Thomas Traynor, David Jassby, Lorenzo Corsini, Dante A. Simonetti, Gaurav N. Sant IN: ACS EST Engg., https://doi.org/10.1021/acsestengg.3c00004

The authors present the mass balances associated with carbon dioxide (CO2) removal (CDR) using seawater as both the source of reactants and as the reaction medium via electrolysis following the “Equatic” (formerly known as “SeaChange”) process. This process involves the application of an electric overpotential that splits water to form H+ and OH– ions, producing acidity and alkalinity, i.e., in addition to gaseous coproducts, at the anode and cathode, respectively. Geochemical simulations quantify the extents of net CO2 removal including the dependencies on the process configuration. It is furthermore indicated that the efficiency of realkalinization of the acidic anolyte using alkaline solids depends on their acid neutralization capacity and dissolution reactivity.

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Reports

Report: Strengthening MRV standards for greenhouse gas removals to improve climate change governance

Leo Mercer & Josh Burke; Grantham Research Institute on Climate Change and the Environment

This report seeks to identify the factors underpinning the monitoring, reporting and verification (MRV) of greenhouse gas removal (GGR) across the spectrum of biological, chemical and geochemical techniques, and the risks associated with GGR-specific MRV. It provides recommendations for policymakers to reduce the complexity and ensure the industry continues to innovate with high levels of integrity.

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