Packed‐Bed Membrane Reactors

Tóta, Á.; Hlushkou, Dzmitry; Tsotsas, Evangelos; Seidel‐Morgenstern, Andreas

doi:10.1002/9783527610600.ch5

Cited by 8 publications

(7 citation statements)

References 45 publications

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“…This model is based on the Equations 2.7 -2.11 presented in Chapter 2 and by (Tota et al , 2007 ), respectively. Important parameters for packed -bed membrane reactors are the effective radial and axial heat dispersion coeffi cients, which were calculated according to two different approaches described by (Tsotsas, 2002 ).…”

Section: Detailed 2 -D Modeling Of a Single -Stage Pbmrmentioning

confidence: 99%

“…Therefore, the use of a wall heat transfer coeffi cient, α w , can only be artifi cial. The correlations applied for the calculation of the radial/axial heat dispersion coeffi cient are given by (Tota et al , 2007 ;Winterberg and Tsotsas, 2000a ).…”

Section: Detailed 2 -D Modeling Of a Single -Stage Pbmrmentioning

confidence: 99%

“…The position of the thermocouples illustrated in Figure 5.10 a was already described in Section 5.4 . A more detailed analysis of the distributed dosing of reactants on the axial temperature profi les was alreadly given by (Tota et al , 2007 ). The study revealed that, for the PBMR, the heat transfer is characterized by heat conduction and additionally a high convective radial fl ow due to the distributed feeding of O 2 and N 2 .…”

Section: Comparison Between Pbr and Pbmr Using Ceramic Membranes In Amentioning

confidence: 99%

“…This indicates that, due to the lower trans -membrane pressure drop shown in Figure 5.12 c for the metal membrane, back -diffusion is expected to play a larger role than for the ceramic membrane. The problem of back -diffusion was investigated in detail and already discussed by (Tota et al , 2006(Tota et al , , 2007. However, despite this limitation, the usage of metal membranes with their better characteristics regarding construction and mechanical stability is possible in principle and can be considered as an attractive alternative to overcome the problems with ceramic membranes if a suffi cient level of trans -membrane pressure drop can be reached.…”

Section: Application Of Sintered Metal Membranes For the Odh Of Ethanementioning

confidence: 99%

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Packed‐Bed Membrane Reactors

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Section: Detailed 2 -D Modeling Of a Single -Stage Pbmrmentioning

confidence: 99%

Section: Detailed 2 -D Modeling Of a Single -Stage Pbmrmentioning

confidence: 99%

Section: Comparison Between Pbr and Pbmr Using Ceramic Membranes In Amentioning

confidence: 99%

Section: Application Of Sintered Metal Membranes For the Odh Of Ethanementioning

confidence: 99%

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Packed‐Bed Membrane Reactors

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“…In the porous regions themselves, it is possible to distinguish between the fl uid and the particulate or solid phases. Several authors have presented calculations with full local resolution of fi eld quantities for both ordered and random packed beds (Dixon and Nijemeisland, 2001 ;Dixon, Nijemeisland, and Stitt, 2003 ;Manjhi et al , 2006 ;Tota et al , 2007 ). However, such solutions are computationally expensive and, hence, seriously limited in regard of the number of particles that can be considered.…”

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Modeling of Membrane Reactors

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Optimal operation of a membrane reactor network

Esche¹,

Arellano‐García

Biegler³

2013

AIChE Journal

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In this contribution, the operation of a membrane reactor network (MRN) for the oxidative coupling of methane is optimized. Therefore, three reactors, a fixed bed reactor (FBR) and two packed bed-membrane reactors, are modeled. For the (CPBMR), a two-dimensional (2-D) model is presented. This model incorporates radial diffusion and thermal conduction. In addition, two 10 cm long cooling segments for the CPBMR are implemented based on the idea of a fixed cooling temperature positioned outside the reactor shell. The model is discretized using a newly developed 2-D orthogonal collocation on finite elements with a combination of Hermite for the radial and Lagrangian polynomials for the axial coordinate. Membrane thickness, feed compositions, temperatures at the inlet and for the cooling, diameters, and the amount of inert packing in the reactors are considered as decision variables. The optimization results in C 2 yields of up to 40% with a selectivity in C 2 products of more than 60%. The MRN consisting of an additional packed-bed membrane reactor with an alternative feeding policy and a FBR shows a lower yield than the individual CPBMR.In case, second-order derivatives appear in a differential equation, the continuity of first-order derivatives across finite elements needs to be ensured. For this application, Hermite cubic polynomials are of advantage. Their usage guarantees the continuity of the function itself and its first derivative Figure 2. Sketch for the heated or cooled model of the CPBMR.

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Packed‐Bed Membrane Reactors

Cited by 8 publications

References 45 publications

Packed‐Bed Membrane Reactors

Packed‐Bed Membrane Reactors

Modeling of Membrane Reactors

Optimal operation of a membrane reactor network

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