What is a practical way of removing CO2 from the air?
123831
I did an AICHE project on this a year ago.  We set up a model using a tower and extracted CO2 from the atmosphere using NaOH.  CO2 + NaOH yields sodium bicarbonate.  It's very expensive to do, however, because the regeneration process of NaOH required a lot of energy.  Also, we ran into problems with air circulation.  Obviously the percentage of CO2 in the atmosphere is very small in comparison to nitrogen and oxygen, so in order to sequester enough CO2 to make a difference in the atmosphere, you have to be moving air at phenomenal velocities, which requires a lot of energy.  Burning fuel to produce this energy is kind of an oxymoron because you'd be adding to the problem of CO2; therefore, we used solar energy in our model.  We then said we'd store the CO2 in empty oil storages.
424412
An idea would be, "Which gas could you fill a volleyball up with that would make it go better?" They you can have regular air, carbon dioxide, and helium. Then you make a hypothesis based on what you know, try one of them, and see if you were wrong.
403693
1) Bring all carbon dioxide producing systems under proper control. Regulate the carbon dioxide generation by all such systems so as to curb fanciful use of such systems, and allow only the necessary.\n\nThe United Nations can impose limits of total CO2 release by all systems in a country that can be allowed, can creat a technologically competent controlling and governing apparatus\nfor this.\n\n2) War footing plantation drives. Cover the entire globe with trees and forests. Not with any kind of green shrub,that is handy,  but botanically designed forests with eco-balance. It is not difficult., if all the Govennemts give this action a serious priority. And also, not so expensive as it may look, if the various populaces over the globe accept it with heart.\n\nForests are commercially exploitable systems. Let big investers cultivate forests on all the waste lands of all the Governments and be allowed to ripe the harvests in future.\n\nAll religions have given importance to trees. Design psychological projects of making all religious leaders to highlight and give emphasis to all the rituals related to trees.\n\nRedefine uses of lands and make suitable legislations. I will put it roughly in  this way. " Any piece of land which is not already used for dwelling, agriculture, industry, water reserves or throughfare, and is not privately owned, is open for any individual to plant trees and ripe the harvests thereof."\n\n3) Concentrate more on developing technology for mass scrubbing of CO2.  Both mega systems and micro systems.
551990
ok--i'm not completely sure about this--but i can at least try-- *cough cough*unlike some people*cough*cough*catweazle*\n\nwe did this type of stuff last year.  but i think that you might want to use the ideal gas law?? we always called it pervnert... PV=nRT... does this sound familiar?    \n\nif not, i suggest asking your teacher, or some other knowledgable chemistry person.\n\ni hope this helps!
351452
If its just proof-of-concept, could you use the pressure of a tank of liquid CO2 to pressurize your vessel with CO2?? Add some liquid CO2  (or even just some dry ice!!) to your vessel from the tank and warm it up to get the desired pressure?\n\nOr possible collaborate with somebody who does CO2 cleaning research?? You might be able to get some preliminary data cheaper by renting their equipment than building your own.
37753
basically you're talking about distilling water, which is a purification technique.  collect the water vapor and let it condense. the result is pure water.
546550
Enzymes tend to work best within narrow pH and temperature ranges, specific for the enzyme in question. Raising the temperature to 100 C would most likely denature the enzyme and render it inactive.\n\nFor your interest, carbonic anhydrase is the catalyst for CO2 exchange in the lung during respiration. It works best at about body temperature and pH of 7.35.
200863
You would need an enormous source of hydrogen, to make the reaction self sustained. That would mean a lot of water and electricity.\n\nMy idea to solve for excess CO2 would be to genetically modify algae so that they can live on Mars or Venus.
422542
Download a mpg decompressor. You should find some on google.
422896
The answer given earlier is more feasible i.e decomposing sodium hydrogen carbonate, the equation thus:\n\n2NaHCO3 --> Na2CO3 + CO2 + H2O\n\nBut, the decomposition for your specific enquiry thus:\nNa2CO3 --> CO2+Na2O\n\nI hope this helps
513152
lol \n\nu would have to figure out, at least, how much CO2 a "common" rainforest tree can remove as they would remove the most CO2 not saying that other foliage would be insignificant. then figure out spacing between those trees. i think from that point you can figure out just how many square meters of rainforest it would take to remove a ton of CO2. \n\nthen, figure out a percent at which the surrounding foliage would assist in the removal of CO2. shrink the total area by that percent to get a more realistic size.
671029
Turn off the vacuum.\n\nremove tube from vacuum to flask.\n\nLift edge of filter paper.\n\nJust do something to break the vacuum.
667986
You could try passing it through carbon, but that may also remove iron.  You would need to try it with known solutions.\nYou may need to go to AA or ICP analysis.
660328
People tend to hyperventilate (breathe fast, without giving the body time to process the air exchange) when stressed.  This causes low levels of carbon dioxide in your blood.  In the past, the remedy was to breathe into a paper bag, thus reducing the amount of oxygen you were taking in and increasing the CO2.  Breathing through a paper bag is NO LONGER RECOMMENDED because this can quickly lead to too much carbon dioxide in your blood stream. \n\nNowadays, to increase your carbon dioxide, you need to take in less oxygen. To accomplish this, you can breath through pursed lips (as if you are blowing out a candle) or you can cover your mouth and one nostril, breathing through the other nostril.
334663
That could be determined by calculation based on the chemistry of the dissolve CO2, but that would become quite involved.  \n\nAnother way would be to measure the volume of CO2 given off by a known volume of Cola, and then factoring it up to he 2 L.  This could be done by collecting it into ann inverted test tube filled with water.  The CO2 would fill the tube and displace the water.\n\nOr else, guzzle a 2 L bottle, and measure the volume of the burp.
461010
Collecting gas over water is a coming chemistry method, because it assures that the gas produced is pure, with air.\nFill a large bassin with water, take a beaker, put it in the water, so that it is filled completely. Next lift the beaker upward and upside down. Don't take it out completely. The water will stay in the beaker.\n\nIf you know lead a tube from the experiment where the gas is produced under the beaker, the gas will replace the water. You are "collecting gas over water".
68670
Supercritical carbon dioxide at high pressure can be used to remove (clean) oil and grease from contaminated material.  As the CO2 expands it removes the oil and grease allowing it to be separated out and the CO2 can be recycled for further use.