Theres community buses at my campus have a VERY large print along the side that say. “Powered by clean natural gas”. What does that mean. Isnt all gas natural?
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Yes, no, not really.
Gas, as in gasoline, the fuel of the typical vehicle, is mostly made by distilling crude oil. The chemical formula is C8H18, though gasoline has a lot of other hydrocarbons and other additives in there. But mostly it’s a hydrocarbon in the C8H18 range.
Natural Gas is a very specific hydrocarbon, CH4. It’s called natural gas because it can naturally form through regular decomposition (it’s often called Methane) rather than needing to be distilled, and it can also be natively found in underground deposits the same way crude oil can.
The “Clean” part of “clean natural gas” is that natural gas generally tends to burn a lot cleaner than gasoline, with fewer unwanted byproducts and contaminants. Ideal combustion is the carbon and hydrogen in the fuel + oxygen in the air = water and carbon dioxide. You’ll never get 100% ideal combustion. You’re more likely to get closer with natural gas than gasoline.
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