Air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.There is also the factor the CO2 will introduce moisture in to the tires which can cause rotting(from the condensate, you have seen the frosting right?). In Aviation & now some tire shops use Nitrogen. If I remember right it is less expensive then CO2, it is dry & the molecules are larger, thus taking longer to seep out then compressed air.
Most of what you wrote is not true with CO2, The gas is dried during the liquid faze of making it, the regular air can have most moisture in it because it is just compressed, that's why most good Garages have water traps on their air compressors, and with the use of Co2 now for five years We have had no problems with any of our TPM senors ,And as far as the inflation goes that can happen to any gas at different alt's.....What are the downsides of CO2 with respect to moisture/corrosion:
- Tires - Will they wear out before rot happens? What if you have a summer and winter sets, would that extended lifespan expose any issues?
- Rims - This is more of a long term concern.
- TPMS sensors - how long will they last?
What are the downsides of CO2 with respect temperature affecting pressure fluctuations? One scenario being when winter brings cold temps, you will see a much bigger pressure drop on CO2 filled tires. Second scenario might be if you air up in cold mountains and drive down to a warm valley and end up overinflated. I guess you just have keep an eye on it to manage it.
Fair enough. I was just reading Power Tank's Q&A to dispel the myths I mentioned. Power Tank has a vested interest in this matter but the explanation is credible.Most of what you wrote is not true with CO2, The gas is dried during the liquid faze of making it, the regular air can have most moisture in it because it is just compressed, that's why most good Garages have water traps on their air compressors, and with the use of Co2 now for five years We have had no problems with any of our TPM senors ,And as far as the inflation goes that can happen to any gas at different alt's.....
As a SCUBA diver that likes to push boundaries while diving deep I can assure you that there are some pretty accurate GAS formulas, else I would be fish food many times over.Fair enough. I was just reading Power Tank's Q&A to dispel the myths I mentioned. Power Tank has a vested interest in this matter but the explanation is credible.
How can there be no moisture in the CO2 in my tires if CO2 is a liquid gas?
CO2 has the unique characteristic of being able to be stored in a dense, amorphous, liquid state under pressure (~800 psi). When CO2 is at atmospheric pressure it goes from a solid (dry ice, -100F) straight to a gas (smoke on top of the Halloween punch bowl) and skips the liquid state. Don't get CO2 confused with a more familiar chemical called H2O which goes from a solid (-32F) to a liquid and then to a gas. Does H2O condense into moisture with temperature changes? Yes. Does CO2? No. Does CO2 cause H2O to condense more with temperature changes and cause equal clump? No and no.
THE IDEAL GAS LAW FORMULA might help explain why different gases expand at virtually the same rate as their temperature increases.
A gas may be completely described by its makeup, pressure, temperature, and volume. Where P is the pressure, V is the volume, n is the number of mols of gas, T is the absolute temperature, and R is the Universal Gas Constant,
Ideal Gas Law: PV = nRT
This formula is the "Ideal Gas Law Formula." Although there is no such thing as an ideal gas the formula is pretty accurate for N2, CO2, and oxygen as we assume that the gas molecules are point masses and the collisions of the molecules are totally elastic. (A completely elastic collision means that the energy of the molecules before a collision equals the energy of the molecules after a collision, or, to put it another way, there is no attraction among the molecules.) The formula becomes less accurate as the gas becomes very compressed and as the temperature decreases but here "very compressed" pressures are well above even the highest tire pressures and "decreased temperatures" are extremely cold, too cold for tires. There are some correction factors for both of these factors for each gas to convert it to a Real Gas Law Formula, but the Ideal Gas Law is a good estimation of the way N2, CO2 and "air" should react through temperature changes. What does all this mean? It simply means that "air", nitrogen vapor, and CO2 vapor should all react pretty much the same within normal tire pressures (0-120 PSI) and temperatures.