TY - JOUR
T1 - Spatiotemporal patterns in catalytic systems
AU - Luss, Dan
AU - Sheintuch, Moshe
N1 - Funding Information:
We wish to acknowledge the support of this research by grants from the USA–Israel Binational Science Foundation, the NSF and the Welch foundation.
PY - 2005/7/30
Y1 - 2005/7/30
N2 - Infrared thermography measurements in various oxidation reactions revealed high-temperature domains whose boundaries are either stationary, oscillating, moving or rotating. These motions were observed on catalytic wires, rings, cylindrical pellets and thin catalytic beds. Their evolutions are different from the classical Turing mechanism, which explains many of the pattern formation in reaction-diffusion system. The observed patterns are strongly affected by the interaction between the local surface reaction rate, the mixing in the surrounding reactant phase and by the intrinsic heterogeneity of the catalytic surface and the transport coefficients. While simulations can qualitatively predict such patterns, quantitative predictions require a reliable kinetic model. Formation of hot regions in a three-dimensional fixed-bed can be predicted with reliable kinetic models. While formation of hot regions in the flow direction in the reactor are reasonably well understood, there is still a need to gain qualitative understanding as well as design criteria for formation of hot zones transversal to the flow direction.
AB - Infrared thermography measurements in various oxidation reactions revealed high-temperature domains whose boundaries are either stationary, oscillating, moving or rotating. These motions were observed on catalytic wires, rings, cylindrical pellets and thin catalytic beds. Their evolutions are different from the classical Turing mechanism, which explains many of the pattern formation in reaction-diffusion system. The observed patterns are strongly affected by the interaction between the local surface reaction rate, the mixing in the surrounding reactant phase and by the intrinsic heterogeneity of the catalytic surface and the transport coefficients. While simulations can qualitatively predict such patterns, quantitative predictions require a reliable kinetic model. Formation of hot regions in a three-dimensional fixed-bed can be predicted with reliable kinetic models. While formation of hot regions in the flow direction in the reactor are reasonably well understood, there is still a need to gain qualitative understanding as well as design criteria for formation of hot zones transversal to the flow direction.
KW - Catalytic systems
KW - Global coupling
KW - Hot zones
KW - Impact of non-uniformities
KW - Spatiotemporal patterns
UR - http://www.scopus.com/inward/record.url?scp=22344433703&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2005.02.043
DO - 10.1016/j.cattod.2005.02.043
M3 - 文章
AN - SCOPUS:22344433703
SN - 0920-5861
VL - 105
SP - 254
EP - 274
JO - Catalysis Today
JF - Catalysis Today
IS - 2
ER -