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SEAscrubber: Flash Seawater CO2
("Scrubber" is the correct term for an apparatus that removes gas impurities from another gas or liquids.)
Slide show of a possible path to remove
the air's CO2 via capturing seawater's CO2 from a flash distillation system's
Desalination - Nuclear - Overview - IAEA.pdf
Using alkaline lakes or even the oceans as CO2 concentrators gives us a better way to extract millions of tons of CO2 from the air every day.
How a flash distillation system works: https://en.wikipedia.org/wiki/Multi-stage_flash_distillation
The above diagram illustrates the idea but not the machine for removing tons of CO2 per day from seawater.
The air in the first few stages of a flash distiller is rich with the CO2 that was earlier absorbed by seawater.
Massive desalination for agricultural purposes could both
restore groundwater aquifers and reduce sea level rise.
California's central valley comes to mind. According to the table above, the weight ratio of CO2 to seawater is 11,111 to 1.
Shoaiba flash distiller and power station, Saudi Arabia. Can consume two small oil tankers of oil per day.
This is why ThorCon's molten salt nuclear reactor is being suggested. Powering SEAscrubbers
Multi-Stage Flash Desalination Plant at Jebel Ali G Station, Dubai. Notice the extensive use of tubular equipment shapes.
Building a fossil fuel powered
developmental prototype SEAscrubber Flash CO2 Capture
We don't have to wait 5 or 10 years for ThorCon's 250 megaWatt(e) molten salt reactor to become a market product.
Footnotes & Links
CARBON DIOXIDE, DISSOLVED (OCEAN)
The ocean contains about sixty times more carbon in the form of dissolved inorganiccarbon than in the pre-anthropogenic atmosphere (~600 Pg C). On time scales <105 yrs, the ocean is the largest inorganic carbon reservoir (~38,000 Pg C) in exchange with atmospheric carbon dioxide (CO2) and as a result, the ocean exerts a dominant control on atmospheric CO2 levels.
The average concentration of inorganic carbon in the ocean is ~2.3 mmol kg−1 and its residence time is ~200 ka.
Dissolved carbon dioxide in the ocean occurs mainly in three inorganic forms: free aqueous carbon dioxide (CO2(aq)), bicarbonate (HCO3 −), and carbonate ion (CO3 2− ).
A minor form is true carbonic acid (H2CO3) whose concentration is less than 0.3% of [CO2(aq)].
The sum of [CO2(aq)] and [H2CO3] is denoted as [CO2].
The majority of dissolved inorganic carbon in the modern ocean is in the form of HCO3 − (>85%) [bicarbonate].
Above 50 °C (122°F) sodium bicarbonate gradually decomposes into sodium carbonate, water and carbon dioxide.
The conversion is fast at 200 °C: 2 NaHCO3 → Na2CO3 + H2O + CO. Most bicarbonates undergo this dehydration reaction.
1 million gallons of water would form a cube 51 feet on a side. A million
gallons of water weighs 8,340,000 pounds.
It will take 11 billion tons of seawater to extract 1 million tons of CO2.
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