27.09.2021

# New Publications

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Melnikova, Irina; et al. (2021): Impact of bioenergy crops expansion on climate-carbon cycle feedbacks in overshoot scenarios

Melnikova, Irina; Boucher, Olivier; Cadule, Patricia; Tanaka, Katsumasa; Gasser, Thomas; Hajima, Tomohiro et al. (2021): Impact of bioenergy crops expansion on climate-carbon cycle feedbacks in overshoot scenarios. In Earth Syst. Dynam. Discuss. (preprint). DOI: 10.5194/esd-2021-72.

"Stringent mitigation pathways frame the deployment of second-generation bioenergy crops combined with Carbon Capture and Storage (CCS) to generate negative CO2 emissions. This Bioenergy with CCS (BECCS) technology facilitates the achievement of the long-term temperature goal of the Paris Agreement. Here, we use five state-of-the-art Earth System models (ESMs) to explore the consequences of large-scale BECCS deployment on the carbon cycle and carbon-climate feedback under the CMIP6 SSP5-3.4-OS overshoot scenario, keeping in mind that all these models use generic crop vegetation to simulate BECCS crops. We show that an extensive cropland expansion for BECCS causes ecosystem carbon loss that drives the acceleration of carbon turnover and affects the estimates of the absolute values of the global carbon-concentration β and carbon-climate γ feedback parameters."

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27.09.2021

# New Publications

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Young, John P.; et al. (2021): Co-Adsorption and Pure-Component Isotherm Measurements on Direct Air Capture Adsorbents Using The Dvs Vacuum

Young, John P.; Martis, Vladimir; Garcia, Susana; van der Spek, Mijndert (2021): Co-Adsorption and Pure-Component Isotherm Measurements on Direct Air Capture Adsorbents Using The Dvs Vacuum. In SINTEF Proceedings (7). Available online at https://sintef.brage.unit.no/sintef-xmlui/bitstream/handle/11250/2780212/Co-Adsorption%20and%20Pure-Component%20Isotherm%20Measurements%20on%20Direct%20Air%20Capture%20Adsorbents%20Using%20The%20Dvs%20Vacuum.pdf?sequence=1&isAllowed=y.

"Temperature vacuum swing adsorption processes that employ amine-functionalised adsorbents are a promising technology to enable carbon dioxide removal directly from the atmosphere. These adsorbents capture carbon dioxide selectively over nitrogen from the air. They also capture significant amounts of water. The co-adsorption of carbon dioxide and water is still poorly understood due to the difficulty of measuring this effect. To date, water adsorption and co-adsorption measurements were time-consuming as breakthrough or equilibrium adsorption experiments were required for each point on an isotherm. Additionally, data required for the accurate modelling of the process includes pure-component water and carbon dioxide isotherms at a range of temperatures and co-adsorption isotherms at a range of temperatures and relative humidities. Attempting to model direct air capture (DAC) processes without this complete set of data might lead to a limited understanding of the process. As a result, process design may be sub-optimal, and the chosen operating conditions might be inefficient. Here we demonstrate how co-adsorption isotherms and purecomponent isotherms can be measured swiftly on an amine-functionalised adsorbent using the Dynamic Vapour Sorption (DVS) Vacuum instrument. We also show how the obtained data can be used to perform first-order kinetic analysis. In this study, Lewatit VP OC 1065® is chosen as an example of an amine-functionalised adsorbent, as it is believed to be similar to the sorbents used by some commercial DAC companies."

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27.09.2021

# Media

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The Guardian: Vast area of Scottish Highlands to be rewilded in ambitious 30-year project

"A large swathe of the Scottish Highlands stretching between the west coast and Loch Ness is to be rewilded as part of a 30-year project to restore nature."

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27.09.2021

# Media

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PhysOrg: Metals supercharge a promising method to bury harmful carbon dioxide under the sea

"There's a global race to reduce the amount of harmful gases in our atmosphere to slow down the pace of climate change, and one way to do that is through carbon capture and sequestration—sucking carbon out of the air and burying it. At this point, however, we're capturing only a fraction of the carbon needed to make any kind of dent in climate change.Researchers from The University of Texas at Austin, in partnership with ExxonMobil, have made a new discovery that may go a long way in changing that. They have found a way to supercharge the formation of carbon dioxide-based crystal structures that could someday store billions of tons of carbon under the ocean floor for centuries, if not forever."

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23.09.2021

# Calls & events

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Call for Submissions: Shopify's Sustainability Fund

Deadline: 12. October 2021

"Our Sustainability Fund was created to help reverse climate change. This means reducing and addressing emissions now, and also supporting emerging technologies that the world needs to mitigate the worst effects of climate change. [...] We will consider any project or solution that stores CO₂ outside of the atmosphere. This includes high-volume, short-term storage solutions that buy us precious time now while long-term, durable carbon removal technologies develop and scale. We are open to projects that are an idea on paper, all the way up to fully commercialized solutions."

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20.09.2021

# Projects

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Project: Flexible Carbon Capture and Storage Modeling (Kleinman Center for Energy Policy)

"In collaboration with Colorado State University and with funding from ARPA-E, the team continues to work on computer modeling for natural gas power plants with carbon capture systems (NGCC) in a future with increased renewables on the grid. This system includes a solution that stores both hot and cold energy when the NGCC plant is not contributing to the grid (i.e. during peak solar hours): the stored heat circles back to the carbon capture system and the stored cold energy feeds the natural gas plant, improving efficiency while reducing emissions."

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20.09.2021

# Projects

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Project: Indirect Carbonation of Alkaline Waste (Kleinman Center for Energy Policy)

"Connected to mine remediation, lab researchers are exploring chemistry that could support the process of reverse mining, or backfilling mines with mine waste infused with CO2. This process would clean the atmosphere while offering mine owners a more valuable product—a qualified carbon offset. An additional health benefit occurs with mine waste composed of asbestos. Reacting CO2 with asbestos alters it from a fibrous mineral (that can be inhaled) into a more benign form."

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20.09.2021

# Projects

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Project: State Mapping Study (Kleinman Center for Energy Policy)

"In partnership with the Nature Conservancy, the lab is working on a custom plan to help the state of Nevada achieve its Net-Zero by 2050 goal—through decarbonization and carbon removal. The plan considers the state’s assets and liabilities—for example, Nevada has a lot of opportunities for geothermal and solar but doesn’t have many forests (for carbon sinks). The goal is to create a sliding scale of options—from more decarbonization and less carbon removal to the flip side. From there, the team hopes to apply this model to other states."

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20.09.2021

# New Publications

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Akimoto, Keigo; et al. (2021): Climate change mitigation measures for global net-zero emissions and the roles of CO2 capture and utilization and direct air capture

Akimoto, Keigo; Sano, Fuminori; Oda, Junichiro; Kanaboshi, Haruo; Nakano, Yuko (2021): Climate change mitigation measures for global net-zero emissions and the roles of CO2 capture and utilization and direct air capture. In Energy and Climate Change, p. 100057. DOI: 10.1016/j.egycc.2021.100057.

"Many existing scenario studies show the need for large amounts of biomass energy with carbon dioxide capture and storage (BECCS) to achieve net-zero emissions, requiring high mitigation costs. This study provides comprehensive and cost-efficient technological portfolios for both energy supply and demand, and reveals the roles of carbon dioxide utilization (CCU) and direct air capture (DAC) for achieving global net-zero emissions by using a technology-rich global energy systems and climate change mitigation model which can assess them comprehensively, while considering several kinds of uncertainties. According to the analyses, DAC will be able to dramatically reduce emission reduction costs and alleviate dependence on BECCS. There are no feasible solutions for temperature increases below 1.5 °C in 2100 with 66% achievability under a temperature overshoot pathway unless DAC is used. Carbon free or nearly carbon free hydrogen plays important roles for net-zero emissions, and CCU helps increase the usability of hydrogen via synthetic fuels, and thus contributes to net-zero emissions. The relationships between DAC and CCU are very complex; the reductions in marginal abatement costs of carbon dioxide (CO2) due to DAC will reduce the roles of CCU around 2050 for many of the pathways to net-zero emissions. Meanwhile, for deeper reductions of CO2 emissions including net negative emissions in 2100, DAC will increase the roles of CCU by providing recovered CO2 from DAC, and also expand the opportunity for the use of recovered CO2 from fossil fuel combustion for synthetic fuels, because the related emissions are offset by larger negative emissions from the combination of DAC and CO2 storage (DACCS)."

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17.09.2021

# Media

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Global Cement: Aalborg Portland Cement to launch carbon capture and storage project at Rørdal cement plant in 2022

"Denmark: Aalborg Portland Cement will begin construction of a carbon capture and storage (CCS) system at its Rørdal, North Jutland, cement plant. It will collaborate with Project Greensand CCS consortium partners to store the captured CO2 in drained oilfields below the North Sea. The company estimates that the Danish part of the North Sea has 16Gt of CO2 storage capacity, out of 300Gt under all EU waters. The endeavour aims to help Denmark to realise its targeted 70% reduction of CO2 emissions by 2030."

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