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As I said yesterday. I tried DIY CNG adsorption. I took 2 1 lb propane bottles. One was just an empty bottle and second I filled with activated carbon. I broke 2 osmosis carbon filters put them into canvas bag and after an hour hammering I got carbon powder. I used refrigerant recovery unit to boost pressure from few inches (I took gas after one of regulators) to 250 Psi. The guinea pig was my propane converted lawnmower. I started it up on propane first and then I started in using CNG without carbon. It ran for 1 minute and 20 seconds. I tried to start it using CNG with carbon but it didn't run. It was starting and dying right away. So, I tried other method. I emptied both bottles and connected one at the time to recovery unit. First bottle without carbon got to 250 Psi in 2 min and 7 sec. Second bottles got to 250 Psi in 1 min and 48 sec. Also I noticed the carbon weight was 560 gram for 1 lb bottle.
I can call this experiment as failed. May be you need special carbon may be something else but at this point I call it FAILED.
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