🚨NEW STUDY🚨
“Given the high expectations placed on #DAC for future #decarbonisation, recent study presents an extensive review of DAC tech, exploring a number of techno-economic aspects, including an updated collection of the current & planned DAC projects around the world.”
🧵
“A dedicated analysis focused on the production of synthetic methane, methanol, and diesel from #DAC and electrolytic hydrogen in the European Union (EU) is also performed, where the #carbonfootprint is analysed for different scenarios and energy sources.”
2/10
The results show that “the maximum grid carbon intensity to obtain #NegativeEmissions with #DAC is estimated at 468 gCO 2 e/kWh, which is compliant with most of the EU countries’ current grid mix.”
3/10
“Using only photovoltaics (PV) and wind, #NegativeEmissions of at least −0.81 tCO 2 e/tCO 2 captured can be achieved.”
4/10
“The maximum grid intensities allowing a reduction of the synthetic fuels carbon footprint compared with their fossil-fuels counterparts range btw 96 & 151 gCO 2 e/kWh.”
5/10
However, “to comply with the Renewable Energy Directive II (REDII) sustainability criteria to produce renewable fuels of non-biological origin, the maximum stays between 30.2 to 38.8 gCO 2 e/kWh.”
6/10
“Only when using PV and wind is the EU average able to comply with the REDII threshold for all scenarios and fuels, with fuel emissions ranging from 19.3 to 25.8 gCO 2 e/MJ.”
7/10
These results highlight the “importance of using renewable energies for the production of synthetic fuels compliant with the EU regulations that can help reduce emissions from difficult-to-decarbonise sectors.”
8/10
Read the paper entitled: "The Role of Direct Air Capture in EU’s Decarbonisation and Associated Carbon Intensity for Synthetic Fuels Production" here ⬇️ econpapers.repec.org/article/gamjen…
🚨 In a NEW study published today, researchers presented an analysis of the atmospheric sulfur budget using nine state-of-the-art global circulation models with interactive aerosol modules & sulfur chemistry.
In particular, "researchers showcase the burdens of the main sulfur species represented in these models (OCS, sulfate aerosols, and SO2), as well as their latitudinal and vertical distribution and seasonal variability. Emission and deposition fluxes were also discussed."
2/12
FINDINGS:
"Sulfate aerosol, carbonyl sulfide & SO2 behave very differently in the atm, providing insight into the modeled processes. OCS is almost chemically inert in troposphere & is primarily influenced by transport mechanisms but undergoes photolysis in stratosphere."
📰 Here's your round-up of top Carbon Dioxide Removal News / Developments, Reports & Scientific Papers from this week (𝟬𝟲 𝗠𝗮𝘆 - 𝟭𝟮 𝗠𝗮𝘆 𝟮𝟬𝟮𝟰)
🔗:
#CarbonDioxideRemoval
#CDR
🧵0/17
@SthlmExergi signed a contract with @Microsoft covering 3.33M tonnes of permanent CDRs over 10 years from BECCS plant at Värtan, Stockholm. "The agreement represents the world's largest permanent removals deal to date."
The Midwest Nuclear DAC Hub (MINDAC) – one of the 19 #DirectAirCapture projects announced for award negotiations by @ENERGY, received the $4 million investment by the DOE.
🚨NEW study explored a system that combines enhanced olivine weathering (EOW) with increased C fixation by diatoms.
EOW can boost ocean's ability to sequester DIC while stimulating diatom growth, which in turn would fix more C & reinforce biological C pump processes. #CDR
🧵1/8
In this study, researchers investigated the short-term synergistic CO2 removal effects of an olivine–diatom coculture system & found that:
2/8
1️⃣ "Over a 6-day incubation period, the olivine dissolution was 92%–144% higher in the olivine–diatom groups compared with the olivine-only groups."
🚨🚜 @Veolia, the UK’s leading resource management firm, has partnered with UK biotechnology startup, @fabricnano, to apply enzymes to rocks to trial faster, permanent #CarbonRemoval directly from the atmosphere.
#EnhancedRockWeathering
“With this world-first trial pairing biology with geology to accelerate rock weathering for carbon sequestration, @Veolia aims to reduce the energy consumption, emissions and timescales for carbon removal by utilizing enzymes to accelerate the natural weathering process.”
2/9
“@fabricnano’s patented technology immobilizes the Carbonic Anhydrase enzyme directly onto large particle basalt, accelerating carbon sequestration timelines from decades to just a couple of years.”