Dehydrogenation Catalyst for Organic Chemical Hydrides and ApplicationScheme to the Various Hydrogen Sources

摘要

Utilization of organic chemical hydride method for the hydrogen storage and transportationby using hydrogenation and dehydrogenation of aromatic compound has been investigatedfrom 1980's. This method has both of high gravimetric and volumetric hydrogen density, andit has little potential risk due to storage and transportation under ambient pressure. It has alsoan advantage that the hydrogen storage and transportation is carried out as a conventionalpetrochemical product. However, this method has not been established technically becausedehydrogenation catalyst does not have the enough stability and the sufficient performance.Chiyoda Corporation has been developed the proprietary dehydrogenation catalyst working inthe simple fixed bed reactor with the high stability and the sufficient performance. Thiscatalyst can generate hydrogen with methylcyclohexane (MCH) conversion: >95%, Tolueneselectivity: >99.9%, hydrogen generation rate: >1000 Ncc/h/cc-cat under the reasonablecondition of 593K (320 ℃), ambient pressure, LHSV:2.0h -1 and co-feed hydrogen:5 ～20mol% in feed. The estimated production cost at hydrogen station for FCV is around64.7￥/Nm 3 -H2 (59 ￠/Nm 3 -H2). The application scheme of the method is also investigated toutilize various hydrogen sources including the refinery, iron manufacture plant andpetrochemical plant, which produce hydrogen as by-product containing high impurity.