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Apr 29 β€’ 7 tweets β€’ 4 min read Twitter logo Read on Twitter
🚨PAPER🚨

"Many scenario analyses suggest that #NegativeEmissionTechnologies, such as #bioenergy with carbon capture and storage & #afforestation, are required to achieve #NetZero target, but their large-scale deployment has a trade-off relationship with food security."
🧡
1/7 Image
So, a new study considered an innovative #NET, "direct air carbon capture and storage (#DACCS), and analyzed its impact on global food access based on an indicator defined by food expenditure per GDP."
2/7
Study found that "the scenario considering DACCS mitigates the adverse impact on food access in regions such as Sub-Saharan Africa compared to the scenario not considering #DACCS by alleviating food expenditure increase & GDP loss associated with emission reduction efforts."
3/7
"In the former scenario, #DACCS becomes a mainstream #NET instead of bioenergy with carbon capture and storage (#BECCS), mitigating the food price increases associated with land use intensification."
4/7
Furthermore, "the implementation of #DACCS allows the use of gas and oil without CCS in regions and sectors where emission reduction is difficult, contributing to the mitigation of the #GDP loss associated with emission reduction."
5/7
So, "DACCS may be evaluated as a worthful option to pursue the simultaneous achievement of net-zero emissions and favorable food access," research (link.springer.com/article/10.100…) concluded.
6/7

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More from @geoengineering1

Apr 30
πŸ“πŸ’‘ π–πžπžπ€π₯𝐲 𝐇𝐒𝐠𝐑π₯π’π π‘π­π¬πŸ’‘πŸ“
Here's is your roundup of top #CarbonDioxideRemoval News Articles / Scientific Papers from the past week: 🌱πŸͺ¨πŸŽ›οΈπŸŒŠ

🧡
1/14 Image
1️⃣ #CarbonRemoval Policy Tracker launched by @CarbonGap to explore Europe’s #CDR #DAC #BECCS policy landscape & pilots.πŸŒ±πŸŽ›οΈ

➑️
2/14
2️⃣ ✍️ @fionaharvey's recent blog post explored the contentious issue related to #CarbonDioxideRemoval technologies.πŸ“°

➑️
3/14
Read 14 tweets
Apr 30
πŸš¨ππ„π– ππ€ππ„π‘πŸš¨

A lately published paper by @rosner_fabian, Schamberger & @hanna_breunig present "a novel #DirectAirCapture concept whereby cooling towers at #geothermal power plants are hybridized to capture CO2 at very #lowcost."

Details in a 🧡below⬇️
[1/6] Image
"The system design is elegant in its ability to overcome key technical challenges and highlights the potential for using existing infrastructure to lower #DirectAirCapture cost and land footprint, and secure utilities and public confidence."
2/6 Image
"The techno-economic analysis suggests a cost-of-capture of $100 per metric tonne of CO2 is feasible, allowing #geothermal facilities to increase their net profit by $29 per metric tonne of CO2 captured β€” or $6 million per year β€” under the 45Q tax credit."
3/6 ImageImage
Read 6 tweets
Apr 30
🚨NEW PAPER🚨

"The recent paper aims to highlight key operational challenges related to #CO2 #Injection in low-temp environments at various pressures."

So, a new approach is provided "to assess injectivity impairment phenomena, & their remediation at the lab scale."

🧡
1/11 Image
"A novel core flooding-based testing apparatus was used to reckon permeability changes of porous core medium during injection of #CO2 across a range of saturations/T/P. This shows the effect on injectivity of
formation-damage mechanisms, including formation of CO2Β hydrates."
2/11 Image
"The new dynamic dual-phase injection test rig was designed, built, and used in this study to assess a range of conditions expected during #CO2Β #injection either into deep saline aquifers or depleted oil and gas reservoirs."
3/11
Read 11 tweets
Apr 29
πŸš¨π‘π„π•πˆπ„π– ππ€ππ„π‘πŸš¨

"The recent review article discusses the basic operation of the marine #CarbonCycle & 2 #mCDR methods that are "thought to offer the greatest potential in terms of #CDR mass:
🌊#OceanIronFertilization
&
🌊#OceanAlkalinityEnhancement."

🧡
1/14 ImageImage
Various conclusions were drawn in the review which are enlisted below:

1️⃣ "The alkalinity of the ocean creates a massive increase in the ocean’s capacity to #store #carbon, relative to a scenario without #OceanAlkalinity."
2/14 Image
2️⃣ "Ocean warming causes decreases in both #CO2 #solubility and the Revelle factor (B), which make the ocean less efficient at #absorbing CO2."
3/14 Image
Read 14 tweets
Apr 29
🚨PAPER🚨

#DAC of CO2 from the atm. is being explored as a tech. that can contribute to the goal of reaching #NetZero CO2 emissions.

A new study led by @DonglongFu1 showed that the use of zeolitic materials are feasible for DAC when it is integrated with H2O harvesting.
🧡
1/7 Image
"A combination of a commercially available desiccant, AQSOA-Z02A, and a mordenite-type zeolite (MOR) enables
continuous operation of a designed #DAC system comprised of two
parallel units with a regeneration temperature of 100Β°C," research finds.
2/7 Image
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200Β°C and 300Β°C."
3/7 ImageImage
Read 7 tweets
Apr 28
πŸš¨ππ€ππ„π‘πŸš¨

πŸ“ "The N-doped #carbon material is one of the most efficient #adsorption materials in the field of carbon capture."Β So, in a recent study a series of N-doped #biochars were successfully prepared by a facile solvent-free method.

Details in a 🧡below ⬇️

[1/7] Image
Among all N-doped biochars, "the #biochar prepared with corncob🌽 powder, K2CO3 & urea at 800°C showed highest #adsorption ability (5.69 mmol/g at 0°C & 1 bar) & selectivity (38.24 at CO2/N2 = 10/90). The biochar also showed excellent thermal stability & cycle performance."
2/7
"Notable, correlation analysis showed that ultra-micropores were the decisive factor for #CO2Β #adsorption at low temperatures; nevertheless, the effect of N-doping would gradually appear with the increase of adsorption temperature."
3/7 Image
Read 7 tweets

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