Hydrate formation conditions were measured for gas mixtures with concentrations of hydrogen from 5 mol% to 66 mol%. The thermodynamic models were proposed to calculate hydrate formation conditions for such systems. By treating hydrogen as a hydrate former, the Kihara parameters and the interaction coefficients between hydrogen and other less volatile hydrate formers in the Ng-Robinson hydrate model were determined from the experimental data. The proposed models were applied to the predictions of hydrate formation for multicomponent systems containing hydrogen. A good agreement was reached between the predictions and the measured data. (C) 2011 Elsevier B.V. All rights reserved.