Record Details

Impact of Wall Heat Transport on Formation of Transversal Hot Zones in Shallow, Non-adiabatic Packed-Bed Reactors

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Impact of Wall Heat Transport on Formation of Transversal Hot Zones in Shallow, Non-adiabatic Packed-Bed Reactors
 
Creator NARENDIRAN, K
VISWANATHAN, GA
 
Subject CO OXIDATION
HETEROGENEOUS CATALYSIS
EXTRAPOLATION METHODS
TEMPERATURE PATTERNS
OSCILLATORY KINETICS
BREATHING PATTERNS
DYNAMICS
FLOW
HYDROGENATION
SYSTEMS
 
Description Transversal hot zones have been reported to form in packed-bed reactors Used to conduct exothermic reactions. Packed bed reactors are usually operated under non adiabatic conditions. Previous attempts to predict the formation of transversal hot zones have been made on both shallow and long reactors under adiabatic conditions; that is, wall heat transport is zero. We show that a rich variety of slowly oscillating transversal hot zones, such as rotating patterns, targets, and spirals, may form in shallow, non adiabatic reactors. Under certain conditions, azimuthally symmetric target patterns coexist with azimuthally non symmetric rotating patterns. Surprisingly, a small wall heat transport can force a traveling wave or band motion observed pricier adiabatic conditions into a rotating pattern. A transition from the rotating patterns and/or target patterns to spiral waves depends on the residence time, the reactor length scale, and the wall heat transfer coefficient. A shallow reactor model predicts that the spatiotemporal patterns oscillate at 4 very low frequency (order of 10(-5) Hz), which is in agreement with predictions based on laboratory experiments.
 
Publisher AMER CHEMICAL SOC
 
Date 2016-01-15T06:03:13Z
2016-01-15T06:03:13Z
2015
 
Type Article
 
Identifier INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 54(30)7352-7363
0888-5885
http://dx.doi.org/10.1021/acs.iecr.5b01048
http://dspace.library.iitb.ac.in/jspui/handle/100/17883
 
Language en