By adding H2S to the N2/CO2 mixture, the new hydrate will become more stable. H2S will occupy both small and large cavities in structure I hydrates. A special feature of H2S compared to non-polar hydrate formers is the impact of the dipole moment. The rotation of H2S inside a cavity exposes an average positive charge outwards, while the average charge of the cavity walls is negative due to the negative water oxygen located on centre of water molecules in the water lattice, and the distribution of the positive hydrogens (Kvamme & Førrisdahl9 ). Even small amounts of H2S added to a fluid mixture of components with various ability to form hydrate, like for instance mixtures of CO2 and N2, can potentially shift the chemical potential of hydrate
