Fig. 4: Changes in gas composition after geo-methanation in reservoir-mimicking mesocosm.
From: Hydrogen storage and geo-methanation in a depleted underground hydrocarbon reservoir
Mean (bars) and individual partial pressure change (points) across substrate gas conversion cycles performed in the high-pressure mesocosm M1 (n = 10), M2 (n = 10) and M3 (n = 22), operated at an initial target pressure (p0) of 40 to 45 bar. Error bars represent the standard deviation from the mean. Data were corrected against abiotic sources of pressure loss as determined in abiotic control mesocosms M4 and M5.
