NOVELTY - The gas separation process comprises entraining a solid particle medium in a fluidizable mixture to form a fluidized mixture that includes an aqueous liquid feed and a first gas mixture feed including a first gas having a first hydrate pressure-temperature (P-T) stability envelope and a second gas having a second hydrate P-T stability envelope different from the first hydrate P-T stability envelope, and conveying the fluidized mixture past a heat transfer surface while contacting the fluidized mixture with the heat transfer surface that is cooler than the fluidized mixture.    USE - The process is useful for separation or transportation of gas such as hydrogen sulfide, carbon dioxide and/or propane in a mixture.    ADVANTAGE - The process ensures energy-efficient, stable and economical separation or transportation of gas using gas hydrate formation with improved separation efficiency, and avoids the need of a hydrate decomposer and reduces the cooling requirements for the heat transfer medium relative to the separation system.    DETAILED DESCRIPTION - The gas separation process comprises entraining a solid particle medium in a fluidizable mixture to form a fluidized mixture that includes an aqueous liquid feed and a first gas mixture feed including a first gas having a first hydrate pressure-temperature (P-T) stability envelope and a second gas having a second hydrate P-T stability envelope different from the first hydrate P-T stability envelope, conveying the fluidized mixture past a heat transfer surface while contacting the fluidized mixture with the heat transfer surface that is cooler than the fluidized mixture, cooling the fluidized mixture upon contact with the heat transfer surface to an operating temperature at an operating pressure, where the operating pressure and the operating temperature are present outside the first hydrate P-T stability envelope and inside the second hydrate P-T stability envelope, converting a portion of the second gas and a portion of the aqueous liquid feed to gas hydrate particles, forming a gas hydrate slurry comprising the gas hydrate particles and the aqueous liquid feed, separating the gas hydrate slurry from the first gas, heating the gas hydrate slurry to decompose the gas hydrate particles and produce a decomposition quantity of the second gas and the portion of the aqueous liquid feed, recovering the first gas separated from the gas hydrate slurry to provide a first recovered quantity of the first gas as a purified gas product, recovering the first gas separated from the gas hydrate slurry to provide a second recovered quantity of the first gas as a purified gas product more concentrated than the first recovered quantity, recycling the first recovered quantity to the fluidized mixture, and placing the gas hydrate slurry in heat transfer communication with the fluidized mixture to absorb latent heat of hydrate formation and to decompose the gas hydrate particles in the gas hydrate slurry. The first recovered quantity is present in a second gas mixture feed with an unreacted portion of the second gas from the first gas mixture feed. The process further comprises repeating the steps performed on the second gas mixture feed. The solid particle medium is essentially inert in the presence of the fluidizable mixture.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of process equipment configured in a separation system of a gas separation process.    Hydrate-forming heat exchanger (14)    Gas separator (16)    Gas recycler (18)    Slurry concentrator (20)    Liquid pressurizer (22)    Heat transfer medium inlet. (24)