04.10.2021

# Media

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Ends Report: BECCS, DACCS and blue carbon: Everything you need to know about negative emissions technologies

"MPs have announced an inquiry into how greenhouse gases can be absorbed and stored. Here’s what you need to know about capturing emissions from biomass combustion, filtering CO2 from the air and other rival ideas."

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30.09.2021

# Calls & events

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Call for Abstracts: 2nd International Conference on Negative CO2 Emissions

Deadline: 1. December 2021

"The objective of the Paris Agreement is to limit global warming to well below 2ºC, and to pursue efforts to limit the temperature increase to 1.5ºC. The carbon budget is the amount of carbon dioxide that we can emit while still limiting global temperature rise to a given level, for example 1.5ºC.The exact size of the carbon budget is uncertain and depends on many factors, including potential future warming of non-CO2 climate forcers. This said, the remaining budgets for limiting the warming to 1.5ºC or 2ºC have been estimated at about 420 and 1170 Gt of CO2 . With unchanged present emissions at about 40 Gt CO2/year these budgets would be exhausted in as few as 10 and 30 years, respectively. Most of the IPCC emission scenarios that meet a global two-degree target in 2100 overshoot the carbon budget at first and then remove the excess carbon with large negative emissions, typically on the order of 400‑800 Gt CO2 up to 2100.At the same time as negative emissions appear to be indispensable to meet adopted climate targets, the large future negative emissions assumed in climate models have been questioned and warnings have been raised about relying on very large and uncertain negative emissions in the future. With the future climate at stake, a deeper and fuller understanding of the various aspects of negative emissions is needed."

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27.09.2021

# Media

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The Guardian: Climate crisis: do we need millions of machines sucking CO2 from the air?

"Does the world need millions of machines sucking carbon dioxide directly out of the air to beat the climate crisis? There is a fast-growing number of companies that believe the answer is yes and that are deploying their first devices into the real world."

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27.09.2021

# Media

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Frankfurter Allgemeine: How to remove CO2 out of the air (German)

German newspaper article on Direct Air Capture. 

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27.09.2021

# Media

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Podcast: Energy Exchange: A Major Milestone For Direct-Air-CO2 Capture

"The world’s biggest carbon capture and storage machine launched last week in Iceland. It’s called Orca. According to Swiss startup Climeworks, the company which built the plant, it will capture 4,000 metric tons of CO2 per year and bury it underground."

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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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Video: C2G: Challenges and Opportunities for Harnessing Climate & SDG Synergies: the role of Carbon Dioxide Removal

"Five years on from the Paris Agreement, recognition is growing that without rapid acceleration in action, limiting global average temperature rise to 1.5-2 °C will not be possible. All the emission pathways in the Intergovernmental Panel on Climate Change (IPCC) Special Report on Global Warming of 1.5°C will require the removal of large volumes of carbon dioxide from the atmosphere using carbon dioxide removal (CDR) techniques to achieve net-zero and thereafter, net-negative emissions. CDR includes both nature-based approaches such as afforestation and reforestation, and technology-based approaches such as direct air carbon capture and storage (DACCS). If deployed at the scale and pace indicated by the IPCC, CDR would create co-benefits and trade-offs for delivery of the Sustainable Development Goals (SDGs). Substantial governance gaps exist around large-scale CDR which need to be addressed urgently to ensure that societal choices, policies, and investments consider regional and national specificities as well as climate and energy goals, in the context of the SDGs implementation. [...] The five UN Regional Commissions can play an instrumental role in bringing different actors together, addressing knowledge and governance gaps and breaking silos in implementing the SDGs. Enhancing governance of CDR could provide an excellent opportunity to focus and align regional and international efforts and foster a cross-sectorial approach. This side-event to the UN High-level Dialogue on Energy  on the 24th of September 2021, will feature the Executive Secretaries of the five UN Regional Commissions, who provide insight into how each region deals with synergies and trade-offs when it comes to responding to climate change objectives and the SDGs, including the role of CDR."

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20.09.2021

# Projects

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Project: High-efficiency, Low-cost, Additive-manufactured Air Contactor (Creare)

"Reducing the cost of CO2 removal from the air requires developing a new contactor, which captures CO2 so it can be recovered, concentrated, and stored. Creare aims to develop a contactor using Creare’s low-cost additive manufacturing methods. Creare will also incorporate a low-cost, durable sorbent that captures CO2 molecules from ambient air and releases CO2 for storage when heated to moderate temperatures. The contactor is designed for wind-driven operation, which reduces cost by eliminating the need for large arrays of fans to blow air through the system."

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20.09.2021

# Projects

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Project: Wind-Driven Direct Air Capture System Using 3D Printed, Passive, Amine-loaded Contactors (Georgia Institute of Technology)

"Georgia Institute of Technology aims to develop a simple, scalable, and modular device that can remove CO2 from the atmosphere. The device will be designed such that ambient wind is sufficient to contact the CO2-laden air with the materials that filter CO2 out. The filtered CO2 will then be concentrated using localized electric heating, which allows the device to be easily deployed and integrated with renewables or the existing electrical grid. The proposed technology is driven solely by electricity with only two moving parts (a damper and a vacuum pump), which dramatically simplifies scale-up and deployment compared with incumbent CO2 removal approaches."

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20.09.2021

# Projects

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Project: Electrochemical Direct Air Capture of CO2 using Redox-active Textiles (University of Michigan)

"The University of Michigan, in collaboration with the University of Massachusetts Amherst, will develop a technology that captures CO2 from the atmosphere using an electrochemical approach, rather than the temperature swing cycle which is typically powered by fossil fuel combustion. The team’s concept is a pH swing cycle that changes conditions between basic and acidic to capture and release CO2, respectively. Direct air capture (DAC) of CO2 by inexpensive renewable electricity could reduce the cost and improve the efficiency of DAC. The team aims to optimize the design of the cycle to achieve high rates of CO2 separation at low energy inputs."

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