Computational Study of Pd-Membrane CH4 Steam Reformer with Fixed Catalyst Bed: Searching for a Way to Increase Membrane Efficiency Full article
| Journal |
International Journal of Hydrogen Energy
ISSN: 0360-3199 , E-ISSN: 1879-3487 |
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| Output data | Year: 2014, Volume: 39, Number: 35, Pages: 20072-20093 Pages count : 22 DOI: 10.1016/j.ijhydene.2014.10.018 | ||||||
| Tags | Closed cross flow structure, Concentration polarization, Hydrogen production, Methane steam reforming, Pd-membrane, Process intensification | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 13-03-12404 |
| 2 | The Ministry of Education and Science of the Russian Federation |
Abstract:
This paper focuses on the feasibility of coupling a Pd-alloy composite membrane with specially structured catalytic bed for SMR at realistic operating and design conditions. The practical aim is computational design of a compact fuel processor, capable to produce ~3 kg/h of high purity hydrogen (~ 10 kW/Litr) for PEM FC applications. The research goal is searching for a way to increase membrane efficiency, because the high cost of membrane remains the major drawback for MR commercialization. A pseudo-2D computationally fast model is developed to analyze the operation of different types of fixed-bed membrane reactor (MR): tube-in-tube or sandwich-type, granular or structured catalyst, Ni or Rh as active component. The influence of the catalyst bed thickness was studied, and the optimum thickness was determined. The study of conventional tube-in-tube MR with granular Ni/Al2O3 catalyst has demonstrated the presence of strong concentration polarization. The external transport of H2 greatly deteriorates the reactor performance. In order to overcome transport limitations and increase membrane efficiency a novel type of structured catalyst support, closed-cross-flow-structure (CCFS) was incorporated in the MR model. Inside CCFS almost ideal transversal mixing is realized due to the monolithic type channels. According to modeling, the CCFS support itself cannot bring any advantages over conventional tube-in-tube MR, if one uses commercial Ni-based catalyst as a CCFS film coating. The significant theoretical increase of MR efficiency was predicted after the replacement of commercial Ni by novel highly active Rh catalyst. The potential advantages of that MR are effectively realized in the case of ultra-thin membrane 4.5 m with extremely high productivity >4 kg(H2)/h/m2. The pre-reforming approach to use diesel fuel as MR feed instead of methane is also briefly discussed
Cite:
Shigarov A.
, Kirillov V.
, Landgraf I.
Computational Study of Pd-Membrane CH4 Steam Reformer with Fixed Catalyst Bed: Searching for a Way to Increase Membrane Efficiency
International Journal of Hydrogen Energy. 2014. V.39. N35. P.20072-20093. DOI: 10.1016/j.ijhydene.2014.10.018 WOS Scopus РИНЦ ANCAN OpenAlex
Computational Study of Pd-Membrane CH4 Steam Reformer with Fixed Catalyst Bed: Searching for a Way to Increase Membrane Efficiency
International Journal of Hydrogen Energy. 2014. V.39. N35. P.20072-20093. DOI: 10.1016/j.ijhydene.2014.10.018 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Jul 2, 2014 |
| Accepted: | Oct 3, 2014 |
| Published online: | Oct 28, 2014 |
| Published print: | Dec 3, 2014 |
Identifiers:
| Web of science: | WOS:000347017200025 |
| Scopus: | 2-s2.0-84913610960 |
| Elibrary: | 24009398 |
| Chemical Abstracts: | 2014:1811453 |
| Chemical Abstracts (print): | 161:717917 |
| OpenAlex: | W2029477309 |