Figure 6
From: Nondestructive natural gas hydrate recovery driven by air and carbon dioxide
Decomposition/replacement ratio beyond the CMC observed under the conditions in the East Sea using CO2/air (20 mol% CO2 and 80 mol% air) gas.
Black and yellow bars represent total CH4 recovery rates based on combination of decomposition and replacement in the pure GH and UBGH, respectively. When CH4 to CO2/air ratio exceeds the CMC, replacement between CH4 and CO2/air initiates. Shaded areas represent the fraction of replacement in the total CH4 recovery and solid lines represent relative contributions of replacement in each case.
