Membrane reactor design for thermally balanced hydrogen production

TY - CONF

T1 - Membrane reactor design for thermally balanced hydrogen production

AU - Simakov, Stas A.

AU - Sheintuch, Moshe

PY - 2005

Y1 - 2005

N2 - Hydrogen production by steam reforming of methane or methanol in a catalytic fixed bed membrane reactor was theoretically investigated. Hydrogen separation by a permselective inorganic membrane (e.g., Pd) shifts the equilibrium of the stem reforming reaction. The endothermicity of the steam reforming is compensated by the combustion of methane or methanol. Two alternative designs for the thermal coupling of endothermic steam reforming and exothermic oxidation were compared. The steady and transient simulations investigated the influence of various operation parameters and specifically were aimed to determine the boundary (of feed temperature, concentration) that will allow adiabatic operation. Since thermal fronts are formed axial dispersion cannot be ignored. The simulations show that the thermally balanced reactor may be operated without heating. The reactor is designed to provide high purity hydrogen feed for fuel cells. Laboratory tests are currently under design. Comparison with other approached, like millisecond combustion will be discussed.

AB - Hydrogen production by steam reforming of methane or methanol in a catalytic fixed bed membrane reactor was theoretically investigated. Hydrogen separation by a permselective inorganic membrane (e.g., Pd) shifts the equilibrium of the stem reforming reaction. The endothermicity of the steam reforming is compensated by the combustion of methane or methanol. Two alternative designs for the thermal coupling of endothermic steam reforming and exothermic oxidation were compared. The steady and transient simulations investigated the influence of various operation parameters and specifically were aimed to determine the boundary (of feed temperature, concentration) that will allow adiabatic operation. Since thermal fronts are formed axial dispersion cannot be ignored. The simulations show that the thermally balanced reactor may be operated without heating. The reactor is designed to provide high purity hydrogen feed for fuel cells. Laboratory tests are currently under design. Comparison with other approached, like millisecond combustion will be discussed.

UR - http://www.scopus.com/inward/record.url?scp=33645648115&partnerID=8YFLogxK

M3 - 论文

AN - SCOPUS:33645648115

SP - 10123

T2 - 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase

Y2 - 30 October 2005 through 4 November 2005

ER -