Showing papers by "Naotsugu Itoh published in 2005"
TL;DR: In this article, a tubular alpha alumina substrate with 0.7μm pore size and 40% porosity was used as the membrane substrate and an intermediate alpha alumina layer was formed by dip-coating over the substrate.
152 citations
TL;DR: In this article, a thin and firmly deposited palladium membrane applicable to surface catalysis is attempted to be prepared, which is based on chemical vapor deposition (CVD) under a forced flow, where due to a pressure difference applied between the outside and the inside of the support tube the chemical vapors enter into the porous layer of a support where they decompose.
100 citations
TL;DR: In this article, a simulation study was performed to investigate the performance of a porous ceramic membrane reactor for hydrogen production by means of methane steam reforming, and the results showed that the methane conversions much higher than the corresponding equilibrium values can be achieved in the membrane reactor due to the selective removal of products from the reaction zone.
55 citations
TL;DR: In this article, a synthetic type apparatus was designed to measure hydrogen solubility in four pure aromatic or cyclic hydrocarbons, benzene, cyclohexane, toluene, and methylcyclohexanes, and two equimolar binary mixtures.
38 citations
TL;DR: In this paper, a simulation study was carried out to elucidate the effects of membrane properties in terms of permeability and selective permeability on the design parameters of a porous ceramic membrane reactor for hydrogen production.
Abstract: A simulation study was carried out to elucidate the effects of membrane properties in terms of permeability and selective permeability on the design parameters of a porous ceramic membrane reactor for hydrogen production.The reaction involved was methane steam reforming. The design and operating parameters of the membrane reactors associated with four sets of membranes with different permeabilities were determined to achieve both the hydrogen production rate of 1 m 3 /h (stp) and the recovery efficiency of 80% at 773 K. It was found that less membrane area was required when a membrane with higher permeability value was used. However, a membrane with a higher selective permeability for hydrogen should be used if the purity of hydrogen is also regarded as one of the process objectives. The sensitivities of the main operating parameters to the reactor performance were also investigated an discussed.
5 citations