Catalytic spatiotemporal thermal patterns during CO oxidation on cylindrical surfaces: Experiments and simulations

TY - JOUR

T1 - Catalytic spatiotemporal thermal patterns during CO oxidation on cylindrical surfaces

T2 - Experiments and simulations

AU - Digilov, Rafael M.

AU - Nekhamkina, Olga

AU - Sheintuch, Moshe

N1 - Funding Information: The catalyst was prepared by Dr. Shyndler of our group. Work supported by Israel Science Foundation and the Technion’s Fund for the Promotion of Research. One of the authors (M.S) is a member of the Minerva Center of Nonlinear Dynamics. The other two authors (R.D.) and (O.N.) are partially supported by the Center for Absorption in Science, Ministry of Immigrant Absorption State of Israel.

PY - 2006

Y1 - 2006

N2 - Dynamics of spatiotemporal thermal patterns during the catalytic CO oxidation over Pd supported on a glass-fiber catalytic cloth rolled into a tube of 20 mm diameter and 80 mm length has been studied in a continuous flow reactor by IR thermography. A specially designed aluminum mirror built in the reactor provided image of the entire surface of the horizontally held catalytic tube. With flow in the main axial direction and through the tube surface, we observed periodic motions of a pulse, which was born downstream and propagated upstream. The temperature pulse motion was accompanied by conversion oscillations of CO2. With flow in the main axial direction, parallel to the surface, we observed a stationary hot zone after an oscillatory transient. These patterns can be simulated with a plug-flow-reactor-like heterogeneous reactor model that incorporates previously determined kinetic and transport parameters.

AB - Dynamics of spatiotemporal thermal patterns during the catalytic CO oxidation over Pd supported on a glass-fiber catalytic cloth rolled into a tube of 20 mm diameter and 80 mm length has been studied in a continuous flow reactor by IR thermography. A specially designed aluminum mirror built in the reactor provided image of the entire surface of the horizontally held catalytic tube. With flow in the main axial direction and through the tube surface, we observed periodic motions of a pulse, which was born downstream and propagated upstream. The temperature pulse motion was accompanied by conversion oscillations of CO2. With flow in the main axial direction, parallel to the surface, we observed a stationary hot zone after an oscillatory transient. These patterns can be simulated with a plug-flow-reactor-like heterogeneous reactor model that incorporates previously determined kinetic and transport parameters.

UR - http://www.scopus.com/inward/record.url?scp=31144463998&partnerID=8YFLogxK

U2 - 10.1063/1.2139088

DO - 10.1063/1.2139088

M3 - 文章

AN - SCOPUS:31144463998

SN - 0021-9606

VL - 124

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 3

M1 - 034709

ER -