#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.
𧡠1/7
"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
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200Β°C and 300Β°C." 3/7
"Techno-economic analyses of 12 process
scenarios reveal that the energy requirement of the best scenario
investigated is 71 GJ/tCO2, while the conventional pure zeolitebased system requires 200 GJ/tCO2." #DAC 4/7
Research declared that, "the optimized system gives a
cost between $246 and $568 per ton CO2 #captured, depending on
the energy costs, while system operates at sub-0Β°C temperatures or with
integration of water harvesting, respectively." #DAC 5/7
π Read open-access study performed by @DonglongFu1 & Mark Devis funded by @Caltech entitled: "Toward the feasible direct air capture of
carbon dioxide with molecular sieves by water
management," here β¬οΈ cell.com/cell-reports-pβ¦
ππ‘ ππππ€π₯π² ππ’π π‘π₯π’π π‘ππ¬π‘π
Here's is your roundup of top #CarbonDioxideRemoval News Articles / Scientific Papers from the past week: π±πͺ¨ποΈπ
"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
"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
"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."
π§΅
1/11
"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
"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
Various conclusions were drawn in the review which are enlisted below:
1οΈβ£ "The alkalinity of the ocean creates a massive increase in the oceanβs capacity to #store#carbon, relative to a scenario without #OceanAlkalinity."
2/14
2οΈβ£ "Ocean warming causes decreases in both #CO2#solubility and the Revelle factor (B), which make the ocean less efficient at #absorbing CO2."
3/14
"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."
𧡠1/7
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
π "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 π§΅below β¬οΈ
[1/7]
Among all N-doped biochars, "the #biochar prepared with corncobπ½ powder, K2CO3Β & urea at 800Β°C showed highest #adsorption ability (5.69 mmol/g at 0Β°C & 1 bar) & selectivity (38.24 at CO2/N2Β = 10/90).Β 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