Investigation on the roles of activated carbon particle sizes on methane hydrate formation and dissociation

Kinetics of methane hydrate formation in the presence of activated carbon and nano-silica suspensions in pure water

“…A strong linear correlation is seen between the amount of methane consumed and the weight of carbon added (Liu et al, 2006). Studies conducted on pre-wetted beds of activated carbon (Siangsai et al, 2015;Mahboub et al, 2012) have demonstrated water-hydrate conversions of even up to 96.5%. It is, therefore, evident that these materials have the potential to address the significant issues being faced by the hydrate formation process.…”

“…To the best of our knowledge, there have been no studies till date on the effect of a suspension of activated carbon on the kinetics of hydrate formation and hence being explored in this study. Research in this field normally looks at fixed beds of particles with high mass ratios of activated carbon to water (Najibi et al, 2007;Liu et al, 2011;Siangsai et al, 2015). Certainly, these studies demonstrate the effectiveness of activated carbon as a kinetic promoter.…”

Methane Hydrate in Confined Spaces: An Alternative Storage System

“…The larger water‐to‐hydrate yield in mesoporous materials clearly supports the necessity of appropriate methane diffusion for an optimum conversion. Water‐to‐hydrate yields above 95 % have also been addressed in the literature for activated carbons with a highly developed mesoporosity ,…”

“…Siangsai et al. also investigated the role of the carbon particle size in the water‐to‐hydrate yield . Experimental results show that the highest average water to hydrate conversion (96.5 %) takes place with the largest particle size (841–1680 μm), due to its large interstitial pore space between the activated carbon particles, whereas the highest methane recovery (98.1 %) was achieved with the smallest fraction (250–420 μm).…”

Grafting of nano-Ag particles on –SO3−-coated nanopolymers for promoting methane hydrate formation

“…[5][6][7][8][9][10][11][12][13][14] For example, Zhong and Rogers 5 reported that SDS above 242 ppm could improve ethane hydrate formation rate more than 700 times. Ganji et al 12 found that with 300-1000 ppm SDS as the promoter methane hydrate formation under initial conditions of 8.3 MPa and 276.2 K could be achieved within 2-3 h and the nal methane consumption could reach 0.12-0.14 mol gas per mol À1 water (119-138 v/v).…”