“…This phenomenon may be due to various ionic or hydration effects existing in the IL aqueous solution. In addition, it is also observed from Table 3 that the inhibition of methane hydrate in the presence of ILs contain similar EMIM cation with various size of anion such as Cl, Br, I, BF 4, HSO 4 and EtSO 4 decreased as following sequence: Cl > Br > I > BF 4 > HSO 4 > EtSO 4 . That means, the ILs with lower size anion group exhibits more inhibition effect on methane hydrate.…”