Diffusion Coefficients: CH4
O2#gas-gas#400C to air#gas-gas#300C
Binary diffusion coefficients for gas-gas, gas-liquid (dissolved gas in water), and liquid-liquid (solute at infinite dilution) systems. Gas-gas D in cm²/s at 1 atm across temperatures -73 to 400°C; gas-liquid D in cm²/s (~1e-5 scale); liquid-liquid in water D in m²/s (~1e-9 scale); liquid-liquid in organic solvents D in cm²/s (~1e-5 scale). Per CRC Handbook 97th Ed., Perry's CEH 8th Ed., Incropera, Marrero & Mason, Cussler.
| species A | species B phase T | D cm2 per s (cm2/s) | estimation method | phase | pressure atm (atm) | species B | temperature C (C) |
|---|---|---|---|---|---|---|---|
| CH4 | O2#gas-gas#400C | 0.978 | experimental | gas-gas | 1 | O2 | 400 |
| CH4 | SF6#gas-gas#100C | 0.167 | experimental | gas-gas | 1 | SF6 | 100 |
| CH4 | SF6#gas-gas#200C | 0.257 | experimental | gas-gas | 1 | SF6 | 200 |
| CH4 | SF6#gas-gas#300C | 0.363 | experimental | gas-gas | 1 | SF6 | 300 |
| CH4 | SF6#gas-gas#400C | 0.482 | experimental | gas-gas | 1 | SF6 | 400 |
| CH4 | air#gas-gas#100C | 0.321 | experimental | gas-gas | 1 | air | 100 |
| CH4 | air#gas-gas#200C | 0.485 | experimental | gas-gas | 1 | air | 200 |
| CH4 | air#gas-gas#20C | 0.21 | experimental | gas-gas | 1 | air | 20 |
| CH4 | air#gas-gas#25C | 0.21 | experimental | gas-gas | 1 | air | 25 |
| CH4 | air#gas-gas#300C | 0.678 | experimental | gas-gas | 1 | air | 300 |
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