Schlagwort: enhanced weathering

Master thesis: Combating Global Warming: Modeling Enhanced Rock Weathering of Wollastonite Using Density Functional Theory

Luan, Brian (2022) Thesis. Rochester Institute of Technology. 88 pp.; accessed from RIT Scholar Works

To obtain an atomic scale understanding of the weathering process and to design more reactive silicates for enhanced rock weathering, CO2 adsorption on low Miller index wollastonite (CaSiO3) surfaces was modeled using density functional theory. Atomic scale structure of (100), (010), and (001) surfaces of wollastonite was predicted and the thermodynamics of their interaction with CO2 was modeled. Mechanisms for electronic charge transfer between the adsorbate and the substrate were studied to shed light on the fundamental aspects of these interactions.

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Research Topic on Frontiers: Constraining the potential of land-based Negative Emissions Technologies (NETs) from a data-driven perspective

Submission Deadlines: Abstract – 13 July 2022; Manuscript – 14 September 2022

In this Research Topic of the Frontiers Journal, the editors aim to constrain the weathering rate of rock powders spread on soils in the field by collecting research that focuses on field measurement data over local, regional, or global scales. In addition, secondary CO2 emissions from the ERW supply chain (e.g., mining, grinding, transport, spread) needs to be quantified in order to draw a holistic picture of net lifecycle CDR through ERW. Furthermore, the impact of ERW on the soil and food security needs to be further investigated.

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Nature-Eufrasio et al. (2022): Environmental and health impacts of atmospheric CO2 removal by enhanced rock weathering depend on nations’ energy mix

Rafael M. Eufrasio, Euripides P. Kantzas, Neil R. Edwards, Philip B. Holden, Hector Pollitt, Jean-Francois Mercure, S. C. Lenny Koh & David J. Beerling IN: Commun Earth Environ 3, 106 (2022), https://doi.org/10.1038/s43247-022-00436-3

Here the authors address the requirement of diverse stakeholders for informative studies quantifying possible environmental and health risks of Enhanced Rock Weathering. Using life-cycle assessment modelling of potential supply chain impacts for twelve nations undertaking Enhanced Rock Weathering deployment to deliver up to net 2 Gt CO2 yr−1 CDR, the authors find that rock grinding rather than mining exerts the dominant influence on environmental impacts.

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CDR Horizons Ep.2: Wollastonite Enhanced Weathering

by OpenAir on Youtube (38 min)

For this second episode of „CDR Horizons“ – a new OpenAir YouTube series – hosts Charles Yang and Harsh Sanghi welcome Dr. Rafael Santos from the University of Guelph (Canada). Dr. Santos shares details about his research into the CDR and productivity gain value of applying crushed wollastonite minerals to agricultural lands. 

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Nature-Kantzas et al. (2022): Substantial carbon drawdown potential from enhanced rock weathering in the United Kingdom

Euripides P. Kantzas, Maria Val Martin, Mark R. Lomas, Rafael M. Eufrasio, Phil Renforth, Amy L. Lewis, Lyla L. Taylor, Jean-Francois Mecure, Hector Pollitt, Pim V. Vercoulen, Negar Vakilifard, Philip B. Holden, Neil R. Edwards, Lenny Koh, Nick F. Pidgeon, Steven A. Banwart, David J. Beerling IN: Nature Geoscience (2022). https://doi.org/10.1038/s41561-022-00925-2

Here the authors use dynamic carbon budget modelling to assess the carbon dioxide removal potential and agricultural benefits of implementing enhanced rock weathering strategies across UK arable croplands. They find that enhanced rock weathering could deliver net carbon dioxide removal of 6–30 MtCO2 yr−1 for the United Kingdom by 2050, representing up to 45% of the atmospheric carbon removal required nationally to meet net-zero emissions.

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Tan et al. (2022): Optimization of Enhanced Weathering Networks with Alternative Transportation Modes

Raymond R. Tan, Beatriz A. Belmonte, Michael Francis D. Benjamin, Viknesh Andiappan, Kathleen B. Aviso IN: Carbon Resources Conversion, 2022, https://doi.org/10.1016/j.crcon.2022.04.002.

Future enhanced weathering systems can be envisioned as supply chain-like networks which have to be optimized to deliver maximum CDR given physical constraints. There is a notable research gap in the literature on decision support for such systems. To address this gap, a mixed integer linear programming (MILP) model is developed in this work to optimize enhanced weathering networks for CDR.

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Amann & Hartmann (2022): Carbon accounting for Enhanced Weathering

Thorben Amann and Jens Hartmann IN: Frontiers in Climate, doi: 10.3389/fclim.2022.849948

„Enhanced Weathering as one of the negative emission technologies is being tested in the field now, but lacks a verifiable and cost-effective carbon accounting approach. Based on results from a lab scale column experiment and field observations, it is hypothesised that the observed stable positive correlation between total alkalinity and electrical conductivity may present a way to easily predict CO2 sequestration by chemical mineral weathering at low costs.“

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Vienne et al. (2022): Enhanced weathering using basalt rock powder: carbon sequestration, co-benefits and risks in a mesocosm study with Solanum tuberosum

Arthur Vienne, Silvia Poblador Ibanez, Miguel Portillo-Estrada, Jens Hartmann, Samuel Ijiehon, Peter Wade, Sara Vicca IN: Frontiers in Climate, doi: 10.3389/fclim.2022.869456

Enhanced weathering (EW) of silicate rocks can remove CO2 from the atmosphere, while potentially delivering co-benefits for agriculture (e.g. reduced nitrogen losses, increased yields). However, quantification of inorganic carbon sequestration through EW and potential risks in terms of heavy metal contamination have rarely been assessed. Here, the authors investigate EW in a mesocosm experiment with Solanum tuberosum growing on alkaline soil.

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Report: Technology Readiness Assessment, Costs and Limitations of five shortlisted NETs

Kenneth Möllersten, Raza Naqvi, Mälardalen University, Report of the NET-RAPIDO Project: Negative emission technologies: readiness assessment, policy instrument design, options for governance and dialogue, 77 pp.

This report presents an in-depth technology readiness, cost assessment and an analysis of practical deployment barriers for NETs along with an analysis of related knowledge gaps and research needs. The selected NETs are (i) bioenergy with carbon capture and storage (BECCS); (ii) direct air capture and storage (DACCS); (iii) large-scale afforestation and reforestation; (iv) soil carbon sequestration; (v) Biochar as soil additive; (vi) Enhanced Weathering; (vii) Accelerated Mineralization; (viii) Ocean fertilization.

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This is CDR: Mineralization Pathways for CDR

Tue, April 5, 2022, 8:00 PM – 9:00 PM CEST

„This Is CDR“, an online event series, welcome Dr. Peter Kelemen of Columbia University’s Lamont Doherty Earth Observatory to talk about his research into mineralization pathways for CDR. Kelemen was recently awarded the American Geophysical Union Hess Medal. He is a member of the National Academy of Sciences, and is a Fellow of the American Geophysical Union, the Mineralogical Society of America, and the Geochemical Society.

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