Optimal design and control of non-adiabatic loop reactors

Madai, A.Y.; Sheintuch, Moshe

doi:10.1016/j.ces.2009.02.021

Cited by 6 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This section is the experimental demonstration of the LR for methane combustion, which, as explained above, is more challenging than the previously tested ethylene combustion . The system design here is somewhat different than that used for ethylene combustion and is aimed to diminish the heat loss encountered in the experimental system used for ethylene combustion .…”

Section: Experimental Study Of Methane and Ethylene Combustionmentioning

confidence: 99%

“…apply to our single-reaction experimental study. 15 The balance equations for the catalytically active sections of each reactor unit are:…”

Section: Modelsmentioning

confidence: 99%

“…where the rate of species i 5 1(methane) or i 5 2 (ethylene) oxidation follows r i ðC i ; TÞ5A i exp ðE ai =RTÞC i 32,33 ; while ethylene combustion is more complex, the first order can be applied at low ethylene concentration. 15 Continuity is applied between units, when feed or exit ports are not located there. The appropriate boundary (Danckwerts') conditions are applied at feed and exit of the last unit, along with initial conditions:…”

Section: Modelsmentioning

confidence: 99%

“…Approximate solutions for reaction front propagation in a nonadiabatic porous media were derived by our group and outlined below . Gatica et al obtained several relations between the front parameters, but, the problem was not closed analytically and only numerical solutions were presented.…”

Section: Introductionmentioning

confidence: 99%

“…Approximate solutions for reaction front propagation in a nonadiabatic porous media were derived by our group and outlined below. 7,15 Gatica et al 16 obtained several relations between the front parameters, but, the problem was not closed analytically and only numerical solutions were presented. In series of the following studies [17][18][19][20][21][22] approximate pseudo-homogeneous and heterogeneous models of different complexity were proposed.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

What is the leanest stream to sustain a nonadiabatic loop reactor: Analysis and methane combustion experiments

2016

View full text Add to dashboard Cite

While previous studies experimentally demonstrated that loop reactor (LR) can be sustained with a lean feed (using ethylene combustion) and have analyzed the single‐reaction adiabatic case, this work analyzes the effects of heat loss and of reactor size to determine the leanest stream (expressed in terms of adiabatic temperature rise ΔTlim) that will sustain the operation. For an adiabatic infinitely long reactor ΔTlim→0 while for a finite reactor ΔTlim scales as (1 + Pe/4)−1 where Pe = Luρcpf/k, and heat loss increases this limit by (β/Pe)1/2. Thus, a good design of a LR will aim to decrease conductivity (k) and radial heat‐transfer coefficient (β) while increasing throughput (u) and reactor length. This article is also the first experimental demonstration of auto‐thermal operation in a LR for catalytic abatement of low‐concentration of methane, showing the leanest stream to be of 8000 ppm vs. 33,000 ppm in a once‐through reactor. Experimental combustion results of methane and of ethylene are compared with model predictions. © 2016 American Institute of Chemical Engineers AIChE J, 63: 2030–2042, 2017

show abstract

Section: Experimental Study Of Methane and Ethylene Combustionmentioning

confidence: 99%

“…apply to our single-reaction experimental study. 15 The balance equations for the catalytically active sections of each reactor unit are:…”

Section: Modelsmentioning

confidence: 99%

Section: Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%