Thermal Distribution in Axial-Flow Fixed Bed with Flowing Gas
This paper reported an experimental research of
steady-state heat transfer behaviour of a gas flowing through a fixed
bed under the different operating conditions. Studies had been carried
out in a fixed-bed packed methanol synthesis catalyst percolated by air
at appropriate flow rate. Both radial and axial direction temperature
distribution had been investigated under the different operating
conditions. The effects of operating conditions including the reactor
inlet air temperature, the heating pipe temperature and the air flow rate
on temperature distribution was investigated and the experimental
results showed that a higher inlet air temperature was conducive to
uniform temperature distribution in the fixed bed. A large temperature
drop existed at the radial direction, and the temperature drop increased
with the heating pipe temperature increasing under the experimental
conditions; the temperature profile of the vicinity of the heating pipe
was strongly affected by the heating pipe temperature. A higher air
flow rate can improve the heat transfer in the fixed bed. Based on the
thermal distribution, heat transfer models of the fixed bed could be
established, and the characteristics of the temperature distribution in
the fixed bed could be finely described, that had an important practical
significance.
[1] K. C. Xie, D. Y. Fang, Methanol technology, Beijing: Chemical Industry
Press, 2010
[2] H. F. Ma, W. Y. Ying, D. Y Fang, "Simulation of a combined converter
for methanol synthesis", Journal of east China University of Science and
Technology, vol. 34, no. 2, pp. 149-153, 2008
[3] R. Caulkin, A. Ahmad, M. Fairweather, X. Jia, R. A. Williams, "An
investigation of sphere packed shell-side columns using a digital packing
algorithm". Computers and Chemical Engineering, vol. 31, no.12, pp.
1715-1724, December. 2007
[4] A Cybulski, J. A Moulijn, Structured catalysts and reactors, New York:
Marcel Dekker Inc, 2th, pp. 1-18, 1998
[5] H. Freund, T. Zeiser, F. Huber, E. Klemm, G. Brenner, F. Durst, G. Emig,
"Numerical simulations of single phase reacting flows in randomly
packed fixed-bed reactors and experimental validation", Chemical
Engineering Science, vol. 58, no. 3-6, pp. 903-910, February-March.
2003
[6] S. S. Bertsch, E. A. Groll, S. V. Garimella, "A composite heat transfer
correlation for saturated flow boiling in small channels", International
Journal of Heat and Mass Transfer, vol. 52, no7-8, pp. 2110-2118, March.
2009
[7] A. G. Dixon, G. Walls, H. Stanness, M. Nijemeisland, E. H. Stitt,
"Experimental validation of high Reynolds number CFD simulations of
heat transfer in a pilot-scale fixed bed tube", Chemical Engineering
Journal, vol. 200-202, pp. 244-256, 15 August. 2012
[8] A. Guardo, M. Coussirat, F. Recasens, M. A. Larrayoz, X. Escaler, "CFD
study on particle-to-fluid heat transfer in fixed bed reactors: Convective
heat transfer at low and high pressure", Chemical Engineering Science,
vol. 61, no. 13, pp. 4341-4353, July. 2006
[9] H. P. A. Calis, J. Nijenhuis, B. C. Paikert, F. M. Dautzenberg, C. M. van
den Bleek, "CFD modelling and experimental validation of pressure drop
and flow profile in a novel structured catalytic reactor packing", Chemical
Engineering Science, vol. 56, no. 4, pp. 1713-1720, February. 2001
[10] J. Xu, W. S. Wei, A. Z. Tian, Y. Fan, X. J. Bao, C. C. Yu, "Temperature
profile in a two-stage fixed bed reactor for catalytic partial oxidation of
methane to syngas", Catalysis Today, vol. 149, no. 1-2, pp. 191-195, 15
January. 2010
[11] J. M. Wu, H. T. Zhang, W. Y. Ying, D. Y. Fang, "Thermal conductivity of
cobalt-based catalyst for Fischer-Tropsch synthesis", International
journal of thermophysics, vol. no. 3, pp. 556-571, March. 2010
[12] D. S. Wen, Y. L. Ding. "Heat transfer of gas flowthrough a packed bed",
Chemical Engineering Science, vol. 61, no. 11, pp. 3532-3542, June. 2006
[13] Y. L. Ding, Z. L. Wang, D. S. Wen, M. Ghadiri, X. F. Fan, D. Parker,
"Solids behaviour in a gas-solid two-phase mixture flowing through a
packed particle bed", Chemical Engineering Science, vol. 60, no. 19, pp.
5231-5239, September. 2005
[14] C. A Coberly, W. R Marshall. "Temperature gradients in gas streams
flowing through fixed granular beds", Chemical Engineering Progress,
vol. 47, pp. 141-147, 1951
[15] A.P. de Wasch, G.F. Froment, "Heat transfer in packed beds", Chemical
Engineering Science, vol. 27, no. 3, pp. 567-576, March. 1972
[16] A. G. Dixon, W. R. Paterson. "Heat transfer in packed beds of low
tube/particle diameter Ratio", Houston: ACS Publications, pp. 238-253,
1978
[1] K. C. Xie, D. Y. Fang, Methanol technology, Beijing: Chemical Industry
Press, 2010
[2] H. F. Ma, W. Y. Ying, D. Y Fang, "Simulation of a combined converter
for methanol synthesis", Journal of east China University of Science and
Technology, vol. 34, no. 2, pp. 149-153, 2008
[3] R. Caulkin, A. Ahmad, M. Fairweather, X. Jia, R. A. Williams, "An
investigation of sphere packed shell-side columns using a digital packing
algorithm". Computers and Chemical Engineering, vol. 31, no.12, pp.
1715-1724, December. 2007
[4] A Cybulski, J. A Moulijn, Structured catalysts and reactors, New York:
Marcel Dekker Inc, 2th, pp. 1-18, 1998
[5] H. Freund, T. Zeiser, F. Huber, E. Klemm, G. Brenner, F. Durst, G. Emig,
"Numerical simulations of single phase reacting flows in randomly
packed fixed-bed reactors and experimental validation", Chemical
Engineering Science, vol. 58, no. 3-6, pp. 903-910, February-March.
2003
[6] S. S. Bertsch, E. A. Groll, S. V. Garimella, "A composite heat transfer
correlation for saturated flow boiling in small channels", International
Journal of Heat and Mass Transfer, vol. 52, no7-8, pp. 2110-2118, March.
2009
[7] A. G. Dixon, G. Walls, H. Stanness, M. Nijemeisland, E. H. Stitt,
"Experimental validation of high Reynolds number CFD simulations of
heat transfer in a pilot-scale fixed bed tube", Chemical Engineering
Journal, vol. 200-202, pp. 244-256, 15 August. 2012
[8] A. Guardo, M. Coussirat, F. Recasens, M. A. Larrayoz, X. Escaler, "CFD
study on particle-to-fluid heat transfer in fixed bed reactors: Convective
heat transfer at low and high pressure", Chemical Engineering Science,
vol. 61, no. 13, pp. 4341-4353, July. 2006
[9] H. P. A. Calis, J. Nijenhuis, B. C. Paikert, F. M. Dautzenberg, C. M. van
den Bleek, "CFD modelling and experimental validation of pressure drop
and flow profile in a novel structured catalytic reactor packing", Chemical
Engineering Science, vol. 56, no. 4, pp. 1713-1720, February. 2001
[10] J. Xu, W. S. Wei, A. Z. Tian, Y. Fan, X. J. Bao, C. C. Yu, "Temperature
profile in a two-stage fixed bed reactor for catalytic partial oxidation of
methane to syngas", Catalysis Today, vol. 149, no. 1-2, pp. 191-195, 15
January. 2010
[11] J. M. Wu, H. T. Zhang, W. Y. Ying, D. Y. Fang, "Thermal conductivity of
cobalt-based catalyst for Fischer-Tropsch synthesis", International
journal of thermophysics, vol. no. 3, pp. 556-571, March. 2010
[12] D. S. Wen, Y. L. Ding. "Heat transfer of gas flowthrough a packed bed",
Chemical Engineering Science, vol. 61, no. 11, pp. 3532-3542, June. 2006
[13] Y. L. Ding, Z. L. Wang, D. S. Wen, M. Ghadiri, X. F. Fan, D. Parker,
"Solids behaviour in a gas-solid two-phase mixture flowing through a
packed particle bed", Chemical Engineering Science, vol. 60, no. 19, pp.
5231-5239, September. 2005
[14] C. A Coberly, W. R Marshall. "Temperature gradients in gas streams
flowing through fixed granular beds", Chemical Engineering Progress,
vol. 47, pp. 141-147, 1951
[15] A.P. de Wasch, G.F. Froment, "Heat transfer in packed beds", Chemical
Engineering Science, vol. 27, no. 3, pp. 567-576, March. 1972
[16] A. G. Dixon, W. R. Paterson. "Heat transfer in packed beds of low
tube/particle diameter Ratio", Houston: ACS Publications, pp. 238-253,
1978
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:64100", author = "Kun Lei and Hongfang Ma and Haitao Zhang and Weiyong Ying and Dingye Fang", title = "Thermal Distribution in Axial-Flow Fixed Bed with Flowing Gas", abstract = "This paper reported an experimental research of
steady-state heat transfer behaviour of a gas flowing through a fixed
bed under the different operating conditions. Studies had been carried
out in a fixed-bed packed methanol synthesis catalyst percolated by air
at appropriate flow rate. Both radial and axial direction temperature
distribution had been investigated under the different operating
conditions. The effects of operating conditions including the reactor
inlet air temperature, the heating pipe temperature and the air flow rate
on temperature distribution was investigated and the experimental
results showed that a higher inlet air temperature was conducive to
uniform temperature distribution in the fixed bed. A large temperature
drop existed at the radial direction, and the temperature drop increased
with the heating pipe temperature increasing under the experimental
conditions; the temperature profile of the vicinity of the heating pipe
was strongly affected by the heating pipe temperature. A higher air
flow rate can improve the heat transfer in the fixed bed. Based on the
thermal distribution, heat transfer models of the fixed bed could be
established, and the characteristics of the temperature distribution in
the fixed bed could be finely described, that had an important practical
significance.", keywords = "Thermal distribution, heat transfer, axial-flow, fixed
bed.", volume = "7", number = "4", pages = "222-7", }