Metal oxide systems with a high lattice-oxygen content, which exhibit reversibility of oxidationreduction transitions, have been synthesized and characterized. Oxidant Solid Contacts have been prepared using these systems as active components. The features of methane interaction with a circulating microspherical solid contact in a flow-through riser reactor have been revealed. The effect of temperature and hydrocarbon residence time in the reactor on the performance of the process has been examined. Optimal conditions for the manufacturing of synthesis gas have been determined, at which the methane conversion reaches 95-99% and the H-2/CO ratio in the product is in the range of 2.0-2.2.