Geoengineering Info Profile picture
May 14, 2023 β€’ 10 tweets β€’ 7 min read β€’ Read on X
πŸš¨βœοΈππ„π– πƒπŽπ‚π“πŽπ‘π€π‹ π“π‡π„π’πˆπ’βœοΈπŸš¨

"The discussion of energy consumption for cryogenic & combined #DirectAirCapture systems is explored in the newly published thesis."πŸŽ›οΈ

Details are discussed in aπŸ§΅β¬‡οΈ
1/10 ImageImage
In this novel approach, "a thermodynamic model was constructed using psychometric theories to model the #desublimation of CO2 in a #DAC system. The system was modeled
to include a precooling heat exchanger & a deposition chamber where the desublimation
of CO2 occurs."
2/10 Image
3️⃣ base systems studied:
πŸ”Έ NC (no precompression/turbine recovery)
πŸ”ΈPC (precompression only)
πŸ”ΈTR (precompression & turbine recovery)
at 3️⃣ different compression ratios, n=400, 800 & 2000.
Then, a combination #DAC system, PSA, was modeled."
3/10 Image
"A dual-column, 4️⃣-step Skarstrom Cycle PSA (pressure swing adsorption & cryogenic distillation) unit was analyzed using Extended Langmuir Models & the
ideal gas law to simulate a CO2 conc. prior to the deposition chamber. The NC & PSA systems were assessed at Tamb= -50β—¦C."
4/10 Image
This study finds that "while increasing the compression ratio of the system, there is no net energy benefit when capturing CO2 given the current state-of-the-art in commercial compressor & #cryocooler capabilities."
5/10 Image
"The assessment of the efficiency of a precooler versus TR finds that it is more advantageous to utilize a heat exchanger precooler than precompression with turbine recovery in a #DAC system. Combining DAC systems may yield a more efficient system."
6/10 Image
"PSA combined with cryogenic capture is less energy intensive than cryogenic capture alone. In a combined #DAC system with PSA and cryogenic distillation,
the PSA unit has a significantly lower energy consumption than the #cryocooler."
7/10 ImageImage
"Increasing the concentration of CO2 entering the deposition chamber significantly decreases the required energy consumption of the #cryocooler."
8/10 Image
Read the complete #Doctoral #Thesis entitled: "Atmospheric Carbon Capture: A Review on Current Technologies and Analysis of Energy Consumption for Various Direct Air Capture (DAC) Systems" here ⬇️
commons.erau.edu/edt/728/

#DirectAirCapture
#DAC

9/10

β€’ β€’ β€’

Missing some Tweet in this thread? You can try to force a refresh
γ€€

Keep Current with Geoengineering Info

Geoengineering Info Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @geoengineering1

Apr 23
🚨A new 3-year study found that by combining crushed rock + compost + biochar could remove 51.7 million tons of COβ‚‚e/yearβ€”just by treating 8% of California’s rangelands.
#ERW #CDR #biochar

Here’s the details:🧡1/9 Image
2/ Researchers spread finely crushed metabasaltic rocks across test plots in Browns Valley, California, in each of 3yrs.

Along with the crushed rock, some of the applications included compost or a combination of compost & biochar (burned pine & fir left over from local logging). Image
3/ Other plots were treated with only compost, and a group of control plots received no treatment.

Throughout the year, the team monitored each plot for levels of soil organic and inorganic carbon, pore water dissolved carbon, aboveground biomass, and greenhouse gas emissions.
Read 10 tweets
Apr 20
πŸ“πŸ’‘π–πžπžπ€π₯𝐲 𝐂𝐃𝐑 𝐇𝐒𝐠𝐑π₯π’π π‘π­π¬πŸ’‘πŸ“

πŸ“° Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (14 April - 20 April 2025):

πŸ”—:

🧡0/18
Microsoft has entered into the world’s largest carbon removal agreement, securing a 15-year contract to purchase 6.75 million metric tons of permanent CDR from AtmosClear, a subsidiary of Fidelis, utilizing BECCS technology.

1/18
reuters.com/sustainability…
Occidental Petroleum has acquired carbon removal startup @holoceneclimate, marking its second direct air capture acquisition in two years. The deal was made through its low-carbon arm, Oxy Low Carbon Ventures, for an undisclosed amount.

2/18
heatmap.news/climate-tech/o…
Read 21 tweets
Apr 18
πŸš¨πŸ—“We launched the first-of-its-kind Solar Geoengineering Events Calender last year, to create the go-to public resource for anyone tracking key events in #SRM. From conferences to job deadlines, we update it regularly.

πŸ”—

Here’s what’s coming up:🧡1/15 teamup.com/ks64mmvtit583e…Image
EVENTβ€”Geoengineering & Climate Intervention: Unconference + Drinks by Emma K & SF Climate Week

πŸ—“20 April 2025 | San Francisco, California
πŸ”—

2/15lu.ma/huhghe6g
EVENTβ€”Earth System Intervention Roundtable by ClimateImpact Calendar

πŸ—“22 April 2025 | California
πŸ”—

3/15lu.ma/earthsystemint…
Read 16 tweets
Apr 15
πŸš¨πŸ—“CDR REMINDERS!πŸ—“πŸš¨

Here's a list of what's coming up this week (15 April - 21 April 2025) in the field of #CarbonDioxideRemoval:

πŸ”—πŸ—“οΈLink to the CDR Events Calendar:


#CDREvents #CDRJobs #Deadlines

🧡1/12 teamup.com/kshqbfhrqkw36s…Image
EVENTβ€”This is CDR: Tropical Scale, Global Impact - NetZero’s Bold Biochar Vision for Brazil by @openaircollect

πŸ—“15 April 2025 | Online
πŸ”—

2/12lu.ma/a9ds7z4y
EVENTβ€”Nellie Show & Tell. A Carbon Dioxide Removal Discovery Day by Nellie Technologies

πŸ—“16 April 2025 | United Kingdom
πŸ”—

3/12eventbrite.co.uk/e/nellie-show-…
Read 13 tweets
Apr 13
πŸ“πŸ’‘π–πžπžπ€π₯𝐲 𝐂𝐃𝐑 𝐇𝐒𝐠𝐑π₯π’π π‘π­π¬πŸ’‘πŸ“

πŸ“° Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (07 April - 13 April 2025):

πŸ”—:

🧡0/21
CO280 signed a landmark 3.69 million tonne agreement with Microsoft over 12 years to scale-up carbon dioxide removal in the us pulp and paper industry.

1/21
prnewswire.com/news-releases/…
Occidental and its subsidiary 1PointFive have secured the first-ever Class VI permits issued by the U.S. Environmental Protection Agency for sequestering CO2 from direct air capture operations.

2/21
eenews.net/articles/epa-i…
Read 24 tweets
Apr 11
🚨A new study from China introduced a groundbreaking system that couples liquid-based direct air capture (L-DAC) with diabatic compressed air energy storage (D-CAES). This integration captures COβ‚‚ & stores energy at competitive costsβ€”$0.53/kWh & $259/tCOβ‚‚. #DAC

DETAILS🧡1/8 Image
2/ Led by researchers at East China University of Science & Technology and Tongji University, the system innovatively combines solvent-based COβ‚‚ capture for both atmospheric and point-source emissions with energy storage.
3/ In the L-DAC component, ambient air is brought into contact with a sprayed alkaline solution.

This reaction converts COβ‚‚ into a carbonate solution that precipitates as solid carbonatesβ€”capturing roughly 1 Mt of COβ‚‚ and delivering 1.48 Mt dry COβ‚‚ annually. Image
Read 9 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(