Hydrogen decomposed turbine system for carbon recovery part 2

摘要

We have been studying about the new power generation systems for CO{sub}2 recovering based on a combined cycle named Hydrogen Decomposed Turbine Systems/HYDET. In these systems the natural gas is reformed and hydrogen is decomposed simultaneouslyfrom reforming gas by using membrane reformer which composed of both the reforming catalyst and the hydrogen separation membrane. HYDET System II has the membrane reformer in the heat recovery steam generator. In this system, gas turbine exhaust heat canbe used for both reforming reaction and production of steam. The net efficiency, therefore, becomes over 50% HHV, which is higher than that of System I. CO{sub}2 recovery ratio depends upon selectivity of the membrane and the cost will be affected by thepermeability of membrane. To apply these systems, key technology is the development of the high temperature inorganic hydrogen separation membrane.