Scale-up design analysis and modelling of cobalt oxide silica membrane module for hydrogen processing

Ji, Guozhao, Wang, Guoxiong, Hooman, Kamel, Bhatia, Suresh K. and Diniz da Costa, João C. (2013) Scale-up design analysis and modelling of cobalt oxide silica membrane module for hydrogen processing. Processes, 1 2: 49-66. doi:10.3390/pr1020049

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Author Ji, Guozhao
Wang, Guoxiong
Hooman, Kamel
Bhatia, Suresh K.
Diniz da Costa, João C.
Title Scale-up design analysis and modelling of cobalt oxide silica membrane module for hydrogen processing
Journal name Processes   Check publisher's open access policy
ISSN 2227-9717
Publication date 2013-08-05
Sub-type Article (original research)
DOI 10.3390/pr1020049
Open Access Status DOI
Volume 1
Issue 2
Start page 49
End page 66
Total pages 18
Place of publication Basel, Switzerland
Publisher M D P I
Collection year 2014
Language eng
Formatted abstract
This work shows the application of a validated mathematical model for gas permeation at high temperatures focusing on demonstrated scale-up design for H2 processing. The model considered the driving force variation with spatial coordinates and the mass transfer across the molecular sieve cobalt oxide silica membrane to predict the separation performance. The model was used to study the process of H2 separation at 500 °C in single and multi-tube membrane modules. Parameters of interest included the H2 purity in the permeate stream, H2 recovery and H2 yield as a function of the membrane length, number of tubes in a membrane module, space velocity and H2 feed molar fraction. For a single tubular membrane, increasing the length of a membrane tube led to higher H2 yield and H2 recovery, owing to the increase of the membrane area. However, the H2 purity decreased as H2 fraction was depleted, thus reducing the driving force for H2 permeation. By keeping the membrane length constant in a multi-tube arrangement, the H2 yield and H2 recovery increase was attributed to the higher membrane area, but the H2 purity was again compromised. Increasing the space velocity avoided the reduction of H2 purity and still delivered higher H2 yield and H2 recovery than in a single membrane arrangement. Essentially, if the membrane surface is too large, the driving force becomes lower at the expense of H2 purity. In this case, the membrane module is over designed. Hence, maintaining a driving force is of utmost importance to deliver the functionality of process separation.
Keyword Inorganic membrane
Driving force
H2 molar fraction
Single
Multi-tube module
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
School of Chemical Engineering Publications
Official 2014 Collection
 
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Created: Thu, 20 Mar 2014, 12:31:23 EST by Vicki Thompson on behalf of School of Chemical Engineering