Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Vladimir Z. Yakhnin and"'
Publikováno v:
The Canadian Journal of Chemical Engineering. 93:1975-1989
Autor:
Vladimir Z. Yakhnin, Michael Menzinger
Publikováno v:
Chemical Engineering Science. 63:1480-1489
In response to transient perturbations, the packed-bed reactor (PBR) can exhibit dynamic thermal instability in the form of resonant amplification of process disturbances. Based on linearized PBR model we derive estimates of the resonance frequency,
Autor:
Vladimir Z. Yakhnin, Michael Menzinger
Publikováno v:
Chemical Engineering Science. 61:347-352
We analyze the experimentally studied processes described in the title to understand the higher amplification factor (by 2x) for perturbations in the CuO-catalyzed reaction. The competition of thermal self-acceleration and heat dispersion is the key
Publikováno v:
Chemical Engineering Science. 59:4011-4022
Amplification of process disturbances, wrong-way behavior, and extinction waves are responses to inlet disturbances of temperature, concentration or flow velocity in packed bed catalytic reactors. They can result in unexpected high temperatures that
Autor:
Peter L. Silveston, and Hector M. Budman, Attasak Jaree, Michael Menzinger, Robert R. Hudgins, Vladimir Z. Yakhnin and
Publikováno v:
Industrial & Engineering Chemistry Research. 42:1662-1673
The occurrence of large-temperature excursions in response to periodic changes in the inlet reactant concentration was demonstrated in a packed-bed reactor for CO oxidation over Pt/Al2O3, a reaction known to be reactant-inhibited. Hysteresis or rate
Autor:
Hector Budman, Michael Menzinger, Robert R. Hudgins, Peter L. Silveston, Attasak Jaree, Vladimir Z. Yakhnin
Publikováno v:
Chemical Engineering Science. 58:833-839
The commonly used packed-bed catalytic reactor can exhibit complex dynamic features such as wrong-way behavior, differential-flow instability, different kinds of traveling waves and bifurcation behavior. Understanding these phenomena is essential for
Autor:
Michael Menzinger, Vladimir Z. Yakhnin
Publikováno v:
Chemical Engineering Science. 57:4559-4567
In the course of catalytic combustion of hydrogen (1–5% H2 in air) in monolith reactors, strongly localized stationary and traveling hot spots arise in response to a sudden and persistent rise of gas flow velocity. Such hot spots may occur, e.g. in
Autor:
Hector Budman, Vladimir Z. Yakhnin, Peter L. Silveston, Robert R. Hudgins, Attasak Jaree, Michael Menzinger
Publikováno v:
Chemical Engineering Science. 56:5719-5726
A recent numerical studies by Yakhnin and Menzinger (Proc. 8th Int. Symp. on Catalyst Deactivation, Brugge, Belgium, 10tober, Vol. 126, 1999, pp. 291–298) suggests that activity inhomogeneity in a catalyst bed can create larger temperature excursio
Autor:
Attasak Jaree, Hector Budman, Vladimir Z. Yakhnin, Michael Menzinger, Peter L. Silveston, Robert R. Hudgins
Publikováno v:
Catalysis Today. 69:137-146
Research appears to be growing on a type of structured reactor in which catalyst activity varies or in which different catalysts are arranged in the reactant flow direction. These reactors offer improved selectivity for some classes of complex reacti
Autor:
Michael Menzinger, Vladimir Z. Yakhnin
Publikováno v:
Chemical Engineering Science. 56:2233-2236