04.03.2019

# New Publications

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Bajamundi, C.; et al. (2019): Capturing CO2 from air. Technical performance and process control improvement

Bajamundi, C.; Koponen, J.; Ruuskanen, V.; Elfving, J.; Kosonen, A.; Kauppinen, J. ; Ahola, J. (2019): Capturing CO2 from air. Technical performance and process control improvement. In: Journal of CO2 Utilization 30, S. 232–239. DOI: 10.1016/j.jcou.2019.02.002.

"Direct air capture (DAC) is a technology for collecting and concentrating carbon dioxide from ambient air. If driven with renewable power, DAC is potentially a negative CO2 emissions technology that can compensate emissions from non-point sources such as aviation, shipping and land-use change. This study presents the results of 10 days capture campaign done between May and July 2018 plus a process control improvement test."

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04.03.2019

# New Publications

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Reynolds, J. (2019): The Governance of Solar Geoengineering: Managing Climate Change in the Anthropocene

Reynolds, J. (2019): The Governance of Solar Geoengineering: Managing Climate Change in the Anthropocene. Cambridge: Cambridge University Press.

"Climate change is among the world's most important problems, and solutions based on emission cuts or adapting to new climates remain elusive. One set of proposals receiving increasing attention among scientists and policymakers is "solar geoengineering," (also known as solar radiation modification) which would reflect a small portion of incoming sunlight to reduce climate change. Evidence indicates that this could be effective, inexpensive, and technically feasible, but it poses environmental risks and social challenges. Governance will thus be crucial."

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04.03.2019

# New Publications

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Anderson, C.; et al. (2019): Natural climate solutions are not enough

Anderson, C.; DeFries, R.; Litterman, R.; Matson, P.; Nepstad, D.; Pacala, S. et al. (2019): Natural climate solutions are not enough. In: Science (New York, N.Y.) 363 (6430), S. 933–934. DOI: 10.1126/science.aaw2741.

"Stabilizing Earth's climate and limiting temperature increase to well below 2°C per the Paris Agreement requires a dramatic uptick in the rate of progress on reducing greenhouse gas (GHG) emissions. [...] Some of us have contributed to among the most optimistic assessments of the potential of NCS (1), whereas others have been more pessimistic (2, 3). But one thing on which we agree, and which technical literature generally acknowledges, is that the benefits of NCS do not decrease the imperative for mitigation from the energy and industrial sectors (2, 4, 5)."

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25.02.2019

# New Publications

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Goeppert, A.; et al. (2019): Efficient, stable, oxidation resistant and cost effective epoxide modified polyamine adsorbents for CO2 capture from various sources including air

Goeppert, A.; Zhang, H.; Sen, R.; Dang, H.; Prakash, S. (2019): Efficient, stable, oxidation resistant and cost effective epoxide modified polyamine adsorbents for CO2 capture from various sources including air. In: ChemSusChem. DOI: 10.1002/cssc.201802978.

"Carbon dioxide adsorbents based on the reaction of pentaethylenehaxamine (PEHA) or tetraethylenepentamine (TEPA) with propylene oxide (PO) were easily prepared in “one pot” by impregnation on a silica support in water. The starting materials are readily available and have a low cost facilitating the production of the adsorbents on a large scale. The prepared polyamine/epoxide adsorbents were efficient in capturing CO2 and regenerable under mild conditions (50‐85 °C)."

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25.02.2019

# New Publications

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Brown, C.; et al. (2019): Achievement of Paris climate goals unlikely due to time lags in the land system

Brown, C.; Alexander, P.; Arneth, A.; Holman, I.; Rounsevell, M. (2019): Achievement of Paris climate goals unlikely due to time lags in the land system. In: Nat. Clim. Chang. 9 (3), S. 203–208. DOI: 10.1038/s41558-019-0400-5.

"These shortcomings are partially the result of avoidable ‘blind spots’ relating to time lags inherent in the implementation of land-based mitigation strategies. Key blind spots include inconsistencies between different land-system policies, spatial and temporal lags in land-system change, and detrimental consequences of some mitigation options. We suggest that improved recognition of these processes is necessary to identify achievable mitigation actions, avoiding excessively optimistic assumptions and consequent policy failures."

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25.02.2019

# New Publications

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Lockley, A.; et al. (2019): Geoengineering and the blockchain: Coordinating Carbon Dioxide Removal and Solar Radiation Management to tackle future emissions

Lockley, A.; Mi, Z.; Coffman, D. (2019): Geoengineering and the blockchain: Coordinating Carbon Dioxide Removal and Solar Radiation Management to tackle future emissions. In: Frontiers of Engineering Management. DOI: 10.1007/s42524-019-0010-y.

"Pairing SRM and CDR offers a contractually complete solution for future emissions if effectively-scaled and coordinated. SRM offsets warming, while CDR takes effect.We suggest coordination using a blockchain, i.e. smart contracts and a distributed ledger. Specifically, we integrate CDR futures with time and volume-matched SRM orders, to address emissions contractually before release."

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25.02.2019

# New Publications

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Lockley, A. (2019): Security of solar radiation management geoengineering

Lockley, A. (2019): Security of solar radiation management geoengineering. In: Frontiers of Engineering Management. DOI: 10.1007/s42524-019-0008-5.

"Solar Radiation Management (SRM) geoengineering is a proposed response to anthropogenic global warming (AGW) (National Academy of Sciences, 2015). There may be profound – even violent – disagreement on preferred temperature. SRM disruption risks dangerous temperature rise (termination shock). Concentrating on aircraft-delivered Stratospheric Aerosol Injection (SAI), we appraise threats to SRM and defense methodologies. Civil protest and minor cyberattacks are almost inevitable but are manageable (unless state-sponsored)."

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25.02.2019

# New Publications

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Sharma, S.; et al. (2019): Carbon and evapotranspiration dynamics of a non-native perennial grass with biofuel potential in the southern U.S. Great Plains

Sharma, S.; Rajan, N.; Cui, S.; Maas, S.; Casey, K.; Ale, S.; Jessup, R. (2019): Carbon and evapotranspiration dynamics of a non-native perennial grass with biofuel potential in the southern U.S. Great Plains. In: Agricultural and Forest Meteorology 269-270, S. 285–293. DOI: 10.1016/j.agrformet.2019.01.037.

"Old world bluestem cultivar WW-B Dahl [Bothriochloa bladhii (Retz.), S. T. Blake] is a non-native perennial C4 bunch grass with biofuel production potential grown predominantly in the Southern U.S. Great Plains. Although this is a popular introduced grass cultivar, data on carbon fluxes and evapotranspiration (ET) from this warm-season grass is rare. In this study, the eddy covariance method was used to measure CO2 and ET from an established stand of bluestem for three years (2013–2015)."

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18.02.2019

# New Publications

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Emerson, D. (2019): Biogenic Iron Dust: A Novel Approach to Ocean Iron Fertilization as a Means of Large Scale Removal of Carbon Dioxide From the Atmosphere

Emerson, D. (2019): Biogenic Iron Dust: A Novel Approach to Ocean Iron Fertilization as a Means of Large Scale Removal of Carbon Dioxide From the Atmosphere. In: Front. Mar. Sci. 6, S. 3944. DOI: 10.3389/fmars.2019.00022.

"This is a proposal for ocean iron fertilization as a means to reduce atmospheric carbon dioxide levels. The idea is to take advantage of nanoparticulate, poorly crystalline Fe-oxides produced by chemosynthetic iron-oxidizing bacteria as an iron source to the ocean. Upon drying these oxides produce a fine powder that could be dispersed at altitude by aircraft to augment wind-driven Aeolian dust that is a primary iron source to the open ocean."

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18.02.2019

# New Publications

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Prajapati, A.; et al. (2019): Assessment of Artificial Photosynthetic Systems for Integrated Carbon Capture and Conversion

Prajapati, A.; Singh, M. (2019): Assessment of Artificial Photosynthetic Systems for Integrated Carbon Capture and Conversion. In: ACS Sustainable Chem. Eng. DOI: 10.1021/acssuschemeng.8b04969.

"Sustainable and continuous operation of an artificial photosynthetic (AP) system requires a constant supply of CO2 captured from the dilute sources such as the flue gas and the air to make fuels and chemicals. Although the architecture of AP systems resembles that of the natural leaves, they lack an important component like stomata to capture CO2 directly from the dilute sources. Here we design and evaluate the solar-to-fuel (STF) efficiency of the integrated AP system that captures CO2 directly from the air/flue gas and converts it to fuels using sunlight."

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