Coastal methane hydrate deposits are globally abundant. There is a need to understand the deep sediment sourced methane … identified in geophysical surveys as an elevated bottom seismic reflection. Geochemical data revealed off-mound methane diffusion … and active fluid advection on-mound. Gas composition (average methane/ethane ratio ~11,000) and isotope ratios of methane …

Response surface methodology with a central composite design was applied to optimize the key factors affecting methane … that substrate concentration and initial pH had significant individual (<i>p</i> < 0.05) effect on methane yield (<i …

Methane hydrate formation and dissociation kinetics were investigated in seawater-saturated consolidated Ottawa sand …. Hydrate formation was achieved by methane charging followed by sediment cooling. The formation of hydrates was delayed with … thermally induced dissociation and pressure-temperature conditions followed theoretical methane-seawater equilibrium conditions …

Moderate elevated vertical methane (CH₄) flux is associated with sediment accretion and raised fluid … water and sediment were variable across the ridge suggesting close proximity of heterogeneous carbon sources. Methane stable … sources across the ridge and show a low methane contribution to organic carbon. …

gas mobilization as equally important process parameter in addition to the rates of methane hydrate dissociation and …

The accumulation of methane hydrate in marine sediments is controlled by a number of physical and biogeochemical … parameters including the thickness of the gas hydrate stability zone (GHSZ), the solubility of methane in pore fluids, the … accumulation of particulate organic carbon at the seafloor, the kinetics of microbial organic matter degradation and methane …

The phase diagram for methane + water is explained, in relation to hydrate applications, such as in flow assurance and …

Entrapment of methane-producing microorganisms between semi-permeable synthetic membranes in a multi-layer membrane …