To provide a method for additionally recovering energy from ammonia which is transferred to waste water, in a process to recover a combustible gas by gasifying and reforming an organic waste.
When the combustible gas is recovered from the organic waste by using a gasifying and reforming furnace 4, ammonia is contained in the waste water discharged at a pretreatment step, namely a dewatering and drying process, and in the waste water discharged in a dust eliminating and washing process for the gas generated by gasifying and reforming the dewatered and dried organic waste. The ammonia in the both waste water is recovered and decomposed into hydrogen and nitrogen using a catalyst. The hydrogen is used as an energy resource for an electric power generator. The catalyst for decomposing ammonia prepared by carrying nickel or nickel oxide as a first component on a metal oxide carrier such as alumina, silica, titania, and zirconia and adding at least one of alkaline earth metals and lanthanoid elements as a form of a metal or an oxide as a second component is preferable.
COPYRIGHT: (C)2005,JPO&NCIPI
Akira Tago
Tetsuya Yanase
Masato Endo
Fukumatsu Terujo
Takao Masuda
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Fumio Yamamoto