TS-17 Hydrogen Decomposed Turbine (HYDET) for Carbon Dioxide Recovery(Session A-5: Performance 2)

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In this paper, the author proposes a new concept for power generation systems, the Hydrogen Decomposed Turbine (HYDET). HYDET uses a gas turbine combined cycle, and is able to recover CO_2. The main features offered by this concept are the reforming of natural gas and the decomposition of hydrogen. Natural gas is reformed, while at the same time hydrogen is decomposed from the reforming gas through the use of a hydrogen separation membrane. The reformer equipped with the hydrogen separation membrane is called a membrane reformer. The residual gas, which contains methane and CO, is subjected to combustion in an afterburner using pure oxygen, with high-concentration CO_2 being exhausted directly for recovery. The system uses high-temperature inorganic hydrogen separation membranes, such as a multi-layer, porous ceramic membrane. HYDET performance will exceed 50% HHV at the sending end. HYDET's CO_2 recovery ratio will depend upon the membrane's CO_2 and CO separation ratios, but would exceed a factor of 90% under normal conditions. When a CO_2 liquefier composed of an LNG cold heat exchanger is used, liquid CO_2 can be recovered at an even higher rate of efficiency. However, before this proposed system can be put to practical use, a membrane reformer with a high-temperature inorganic hydrogen separation membrane must first be developed.
公益社団法人日本ガスタービン学会の論文
1999-11-14