Title: Hydrogen production by catalytic methane decomposition and catalyst regeneration by oxygen mixtures in fluidised and fixed bed reactors
Author: Giovanna Ruoppolo, Paola Ammendola
Istituto di Ricerche sulla Combustione (IRC-CNR), P.le Tecchio 80, 80125 Napoli, Italy.
Istituto di Ricerche sulla Combustione (IRC-CNR), P.le Tecchio 80, 80125 Napoli, Italy
Journal: Int. J. of Nuclear Hydrogen Production and Applications, 2009 Vol.2, No.1, pp.4 - 20
Abstract: In the present paper, the Thermo-Catalytic Decomposition (TCD) of methane has been investigated in a laboratory-scale bubbling fluidised bed reactor using copper dispersed on γ-alumina as a catalyst. The usefulness of a fluidised bed operation instead of a fixed bed operation has been assessed in terms of methane-to-hydrogen conversion and the amount of carbon accumulated on the catalyst. The possibility of carrying out a two-stage operation for hydrogen production from methane TCD in fluidised bed reactors, which consists of operating the fluidised bed as a reactor for methane decomposition until a defined catalyst deactivation degree is achieved and then operating the fluidised bed as a combustor for catalyst regeneration by carbon oxidation, has also been investigated. The typical behaviours of fluidised bed reactors contribute to the opportunity to adopt such a regeneration strategy on the basis of the performances obtained with catalyst regeneration by means of carbon combustion in fixed and fluidised bed reactors.
Keywords: hydrogen production; methane decomposition; catalyst regeneration; carbon oxidation; fluidised bed reactors; fixed bed reactors; thermo-catalytic decomposition.