Methane hydrate formation and dissociation : roles of promoters ...

• Main Author: Kimhak Neak
• Format: Dataset
• Language: unknown
• Published: Chulalongkorn University 2018
• Subjects: Methane hydrate; Methane hydrate > Decay; มีเทนไฮเดรต; มีเทนไฮเดรต > การสลายตัว
• Online Access: https://dx.doi.org/10.14457/cu.the.2018.155; http://doi.nrct.go.th/?page=resolve_doi&resolve_doi=10.14457/CU.the.2018.155

Roles of promoters become necessary in methane hydrate formation for the attempt of gas storage application, but some additives might cause unwanted results in gas recovery. The effects of amino acids (l-leucine and l-valine) and surfactants, sodium dodecyl sulfate (SDS), and methyl ester sulfonate (MES) was investigated at 8 MPa and 2 to 4 °C. L-leucine system enhanced hydrate formation because of its surface activity and surface adsorption at interfaces. A noticeable methane uptake yield was also observed in the l-valine solution. Its influences might be from the nature of l-valine that has non-polar, aliphatic hydrophobic side chain resulting in lower surface activity or surface adsorption at gas/liquid interfaces. Moreover, synergism between MES and SDS was observed with fast kinetics and high gas uptake because of micelle formation to lower the interfacial tension in the solution. At the same scale of the concentration, 0.23 wt% (CMC-SDS), amino acids cannot achieve methane hydrate formation compared to ...