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Apr 18 7 tweets 6 min read Twitter logo Read on Twitter
🚨 PAPER 🚨

A viable & novel formula for a #CarbonNegative, environmentally friendly #concrete that is nearly as strong as regular concrete has been developed recently at Washington State University.

#Concrete
#Biochar
#CarbonSequestration

*Summary* in a🧵 below:
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🧫 Researchers exemplify "a synergistic C-capture strategy, i.e., using #concrete washout water & #biochar together to achieve carbon-negative concrete."

"This strategy enabled the biochar to #capture 22.85 wt% air-borne CO2, which precipitated CaCO3 onto the biochar."
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🔬"This carbon-negative cement paste consisted of 30 wt% CO2-weathered #biochar and 70 wt% portland limestone #cement, which achieved the 7-day and 28-day compressive strengths of 22.1 MPa and 27.6 MPa, respectively," microscopic investigation revealed.
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✅ "A concrete made of the material would be expected to continue #sequestering carbon dioxide for the lifetime of the #concrete, typically 30 years in pavement or 75 years in a bridge."
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🎯 To commercialize this technology, "the researchers have been working with the Office of Commercialization to protect intellectual property and have filed a provisional patent application on their #CarbonNegative #concrete work."
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Read insights on how researchers develop carbon-negative concrete with biochar here ⬇️
sciencedirect.com/science/articl…

#CarbonSequestration
#Concrete
#Biochar
#CarbonCapture
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More from @

Apr 20
🚨PAPER🚨

The newly published article focuses on the physical & chemical aspects of #CO2 #storage via liquid & solid chemical carriers & sorbents & gives an overview of the energetics around their use & options for their future development.
#CarbonRemoval
#CarbonStorage
🧵
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Research pointed that "exciting opportunities for coupling #capture and medium to high maturity multi-year #storage technologies could support #CarbonRemoval in the coming decades."
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Highlights of the analysis are:
🔸"The remarkable #storage capacity of oxalic acid & formic acid (CO2-density of 1857 kg m−3 & 1152 kg m−3, compared with condensed liquid CO2 at 993–1096 kg m−3, respectively)."
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Read 7 tweets
Apr 19
🚨PAPER🚨

A recent study funded by @DegreesNGO, executed by @peteirvine & others aims "to assess the impact of #SAG on Sea Surface Temperature (SST) in the Gulf of Guinea & its causes using GLENS simulations performed under high anthropogenic emission scenario (RCP8.5)."
🧵
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"Study focus on two dynamically different regions:
🔸Sassandra Upwelling in Côte d’Ivoire (SUC, located east of Cape Palmas)
🔸Takoradi Upwelling in Ghana (TUG, located east of Cape Three Points)"
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Results show that "in the SUC region, under climate change, there is an increase in SST (referred to as the current climate) all year long (by 1.52 °C on average) mainly due to an < in net heat flux (lead by the > in longwave radiation) & also in weak vertical mixing."
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Read 8 tweets
Apr 18
🚨NEW PAPER 🚨

"The energy-intensive nature of CO2 absorption-desorption processes has restricted deployment of #DAC operations. So, catalytic solvent regeneration is a valid solution to tackle this case by accelerating CO2 desorption at lower regeneration temperatures."
🧵
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The new work reports "a one-step synthesis methodology to prepare monodispersed #carbon nanospheres (MCSs) using trisodium citrate as a structure-directing agent with acidic sites."
#DirectAirCapture
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"The assembly of citrate groups on the surface of MCSs enables consistent spherical growth morphology, reduces agglomeration & enhances H2O dispersibility. The functionalization-assisted synthesis produces uniform hydrophilic nanospheres of 100–600nm range."
#DirectAirCapture
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Read 7 tweets
Apr 18
Michael Finus's project "The Governance Architecture of Climate Agreements in the Light of #SolarRadiation" analyzed "how #GeoEngineering in the form of #SRM, associated with the potential of high collateral damages, affects the governance architecture of climate agreements."
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This project "clarify under which conditions signatories to a climate agreement can avoid that non-signatories deploy risky #geoengineering."
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This study also "correct & qualify the results of Millard-Ball (2012): not only must collateral damages be above but also below a threshold so as the threat to deploy #geoengineering can stabilize a climate agreement on reducing #GHG."

Read Preprint ⬇️
papers.ssrn.com/sol3/papers.cf…
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Read 4 tweets
Apr 16
Top #CarbonDioxideRemoval stories/news from the past week covered in a 🧵below ⬇️
Featuring:
🔸@undo
🔸@noya
🔸Frontier
🔸@Climeworks
🔸Apple

Read below ⬇️ Image
1️⃣ @undocarbon inked a contract with Microsoft to #remove 5000 tonnes of atmospheric CO2 by spreading crushed #basalt rock on agricultural land, accelerating #RockWeathering.
#CarbonRemoval
2️⃣ The carbon removal startup @noya_carbon has announced the successful closing of its Series A financing round, with $11 million raised in investment for its future #DAC technology projects.
#CarbonRemoval
Read 6 tweets
Apr 16
🚨THESIS🚨
An analysis of published data exploring the effects of high pH on #phytoplankton growth rate & experimental assessment of pH dependence of viability & growth rate was used in a "lately published thesis" to assess potential impacts of #OceanAlkalinityEnhancement.
🧵
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📉 The results from this study suggest that there will be no significant impact on the viability or growth rates of Thalassiosira pseudonana or Pavlova lutheri with short-term (10-minute) exposure to elevated #pH
#OAE
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However, when long-term (days) exposure occurs there is a significant decrease in growth rates with high pH. Short-term exposure is predicted to more closely mirror the natural systems in which #OAE will be implemented because of system flushing & replenishment of nutrients. 
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Read 4 tweets

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