Perhaps this synthetic sequence could remove CO2 from the air at low
cost and high throughput.
(1) Electrolysis of water (solar or wind energy) -----> hydrogen gas
http://en.wikipedia.org/wiki/Electrolysis_of_water
(2) Haber process using hydrogen gas from (1) + nitrogen from air -----
> ammonia
http://en.wikipedia.org/wiki/Haber_process
(3) Carbonic anydrase in water + CO2 from air -----> carbonic acid
-----> carbon dioxide gas
http://en.wikipedia.org/wiki/Carbonic_anhydrase
(4) carbon dioxide from (3) + ammonia from (2) ------> urea
http://en.wikipedia.org/wiki/Urea
(5) urea -----> cyanuric acid -----> land fill
http://en.wikipedia.org/wiki/Cyanuric_acid
Step 3) would reduce CO2 levels rather than just avoid increasing them
(as with carbon capture), in case of a real emergency in which we must
remove CO2 or perish.
Step 1) could put wind and solar energy equipment to good use for a
change, and less need for cooperation by existing electrical grid
operators than renewable energy projects normally entail.
As to the energy consumption of the Haber process, it may be
reasonable since the hydrogen in not from reformation of methane.
Regards,
Robert Hahl, Ph.D., Patent Attorney
Neifeld IP Law, PC
4813-B Eisenhower Avenue
Alexandria, VA 22304
www.neifeld.com
Tel: 703-415-0012 ext 25
Fax: 703-415-0013
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