Experimental Investigation on Solid Concentration in Gas-Solid Circulating Fluidized Bed for Methanol-to-Olefins Process
Methanol-to-olefins coupled with transformation of
coal or natural gas to methanol gives an interesting and promising way
to produce ethylene and propylene. To investigate solid concentration
in gas-solid fluidized bed for methanol-to-olefins process catalyzed by
SAPO-34, a cold model experiment system is established in this paper.
The system comprises a gas distributor in a 300mm internal diameter
and 5000mm height acrylic column, the fiber optic probe system and
series of cyclones. The experiments are carried out at ambient
conditions and under different superficial gas velocity ranging from
0.3930m/s to 0.7860m/s and different initial bed height ranging from
600mm to 1200mm. The effects of radial distance, axial distance,
superficial gas velocity, initial bed height on solid concentration in the
bed are discussed. The effects of distributor shape and porosity on
solid concentration are also discussed. The time-averaged solid
concentration profiles under different conditions are obtained.
[1] A. Izadbakhsh, F. Farhadi, F. Khorashe, "Effect of SAPO-34-s
composition on its physico-chemical properties and deactivation in MTO
process", Appl. Catal., A, vol. 364, pp. 48-56, 2009.
[2] X. C. Wu, M. G. Abraha, R. G. Anthony, "Methanol conversion on
SAPO-34: reaction condition for fixed-bed reactor", Appl. Catal., A, vol.
260, pp. 63-73, 2004.
[3] B. V. Vora, T. L. Marker, P. T. Barger, H. E. Fullerton, H. P. Nilson, S.
Kvisle, T. Fuglerud, "Economic route for natural gas conversion to
ethylene and propene", Stud. Surf. Sci. Catal., vol. 107, pp. 87-92, 1997.
[4] H. Q. Zhou, Y. Wang, F. Wei, D. Z. Wang, Z. W. Wang, "In situ
synthesis of SAPO-34 crystals grown onto a-Al2O3 sphere supports as
the catalyst for the fluidized bed conversion of dimethyl ether to olefins",
Appl. Catal., A, vol. 341, pp. 112-118, 2008.
[5] H. Y. Zhu, J. Zhu, "Gas-Solids Flow Structures in a Novel Circulating
Turbulent Fluidized Bed", AIChE. J, vol. 54, no. 5, pp. 1213-1221, 2008.
[6] Y. P. Li, B. J. Ma, J. B. Hu, K. Zhao, "Numerical Simulation of the
Hydrodynamics of Gas/Solid Two-Phase Flow in a Circulating Fluidized
Bed with Different Inlet Configurations", Chem. Eng. Tech., vol. 32, no.
6, pp. 964-965, 2009.
[7] W. Q. Zhong, Y. Zhang, B. S. Jin, M. Y. Zhang, "Discrete Element
Method Simulation of Cylinder-Shaped Particle Flow in a Gas-Solid
Fluidized Bed", Chem. Eng. Tech., vol. 32, pp. 386-396, 2009.
[8] J. J. Nieuwland, R. Meijer, J. A. M. Kuipers, W. P. M. van Swaaij,
"Measurements of solids concentration and axial solids velocity in
gas-solid two-phase flows", Powder Technol., vol. 87, pp. 127-137,
1996.
[9] D. Tayebi, H. F. Svendsen, A. Grislingås, T. Majdell, K. Johannessen,
"Dynamics of luidized-bed reactors: development and application of a
new multi-optical fiber probe", Chem. Eng. Sci., vol. 54, pp. 2113-2123,
1999.
[10] E. Taghipou, N. Ellis, C. Wong, "Experimental and Computational
Study of Gas-solid Fluidized Bed Hydrodynamics", Chem. Eng. Sci.,
vol. 60, pp. 6857-6867, 2005.
[11] L. J. Zhang, T. Li, W. Y. Ying, D. Y. Fang, "Experimental Study on
Bubble Rising an Descending Velocity Distribution in a Slurry Bubble
Column Reactor", Chem. Eng. Tech., vol. 31, no. 9, pp. 1362-1372,
2008.
[12] L. J. Zhang, T. Li, W. Y. Ying, D. Y. Fang, "Rising and descending
bubble size distributions in gas-liquid and gas-liquid-solid slurry
bubble column reactor", Chem. Eng. Res. Des., vol. 86, pp. 1143-1146,
2008.
[13] X. B. Qi, H. Zhang, J. Zhu, "Solids concentration in the fully developed
region of circulating fluidized bed downers", Powder Technol., vol. 183,
pp. 417-427, 2008.
[14] J.J. Nieuwland, R. Meijer, J.A.M. Kuipers, W.P.M. van Swaaij,
"Measurements of solids concentration and axial solids velocity in
gas-solids two-phase flows", Powder Technol., vol. 87, pp. 127-137,
1996.
[15] H. Zhang, P.M. Johnston, J. X. Zhu, H. I. D. e. Lasa, M. A. Bergougnou,
"A novel calibration procedure for a fiber optic solids concentration
probe", Powder Technol., vol. 100, pp. 260-270,1998.
[16] H. Johnsson, F. Johnsson, "Measurements of local solids
volume-fraction in fluidized bed boilers", Powder Technol., vol. 115, pp.
13-18, 2001.
[17] F Wei, H Lin, Y Cheng, Y Jin, Z Yu, "Profiles of Particle Velocity and
Solids Fraction in a High Density Riser", Powder Technol., vol. 100, pp.
183-193, 1998.
[18] D. Gidspow, B. Ettehadieh, " Fluidization in two dimensional beds with
a jet: Part Ôàí . Hydrodynamic modeling" , Ind. Eng. Chem. Fundam.,
vol. 22, pp. 193-201, 1983.
[19] J. A. M. Kupiers, H. Tammes, W. Princs, W. P. M. van Swaaij,
"Experimental and theoretical porosity profiles in two dimensional
gas-fluidized bed with a central jet", Powder Technol., vol. 71, pp.
87-92, 1992.
[1] A. Izadbakhsh, F. Farhadi, F. Khorashe, "Effect of SAPO-34-s
composition on its physico-chemical properties and deactivation in MTO
process", Appl. Catal., A, vol. 364, pp. 48-56, 2009.
[2] X. C. Wu, M. G. Abraha, R. G. Anthony, "Methanol conversion on
SAPO-34: reaction condition for fixed-bed reactor", Appl. Catal., A, vol.
260, pp. 63-73, 2004.
[3] B. V. Vora, T. L. Marker, P. T. Barger, H. E. Fullerton, H. P. Nilson, S.
Kvisle, T. Fuglerud, "Economic route for natural gas conversion to
ethylene and propene", Stud. Surf. Sci. Catal., vol. 107, pp. 87-92, 1997.
[4] H. Q. Zhou, Y. Wang, F. Wei, D. Z. Wang, Z. W. Wang, "In situ
synthesis of SAPO-34 crystals grown onto a-Al2O3 sphere supports as
the catalyst for the fluidized bed conversion of dimethyl ether to olefins",
Appl. Catal., A, vol. 341, pp. 112-118, 2008.
[5] H. Y. Zhu, J. Zhu, "Gas-Solids Flow Structures in a Novel Circulating
Turbulent Fluidized Bed", AIChE. J, vol. 54, no. 5, pp. 1213-1221, 2008.
[6] Y. P. Li, B. J. Ma, J. B. Hu, K. Zhao, "Numerical Simulation of the
Hydrodynamics of Gas/Solid Two-Phase Flow in a Circulating Fluidized
Bed with Different Inlet Configurations", Chem. Eng. Tech., vol. 32, no.
6, pp. 964-965, 2009.
[7] W. Q. Zhong, Y. Zhang, B. S. Jin, M. Y. Zhang, "Discrete Element
Method Simulation of Cylinder-Shaped Particle Flow in a Gas-Solid
Fluidized Bed", Chem. Eng. Tech., vol. 32, pp. 386-396, 2009.
[8] J. J. Nieuwland, R. Meijer, J. A. M. Kuipers, W. P. M. van Swaaij,
"Measurements of solids concentration and axial solids velocity in
gas-solid two-phase flows", Powder Technol., vol. 87, pp. 127-137,
1996.
[9] D. Tayebi, H. F. Svendsen, A. Grislingås, T. Majdell, K. Johannessen,
"Dynamics of luidized-bed reactors: development and application of a
new multi-optical fiber probe", Chem. Eng. Sci., vol. 54, pp. 2113-2123,
1999.
[10] E. Taghipou, N. Ellis, C. Wong, "Experimental and Computational
Study of Gas-solid Fluidized Bed Hydrodynamics", Chem. Eng. Sci.,
vol. 60, pp. 6857-6867, 2005.
[11] L. J. Zhang, T. Li, W. Y. Ying, D. Y. Fang, "Experimental Study on
Bubble Rising an Descending Velocity Distribution in a Slurry Bubble
Column Reactor", Chem. Eng. Tech., vol. 31, no. 9, pp. 1362-1372,
2008.
[12] L. J. Zhang, T. Li, W. Y. Ying, D. Y. Fang, "Rising and descending
bubble size distributions in gas-liquid and gas-liquid-solid slurry
bubble column reactor", Chem. Eng. Res. Des., vol. 86, pp. 1143-1146,
2008.
[13] X. B. Qi, H. Zhang, J. Zhu, "Solids concentration in the fully developed
region of circulating fluidized bed downers", Powder Technol., vol. 183,
pp. 417-427, 2008.
[14] J.J. Nieuwland, R. Meijer, J.A.M. Kuipers, W.P.M. van Swaaij,
"Measurements of solids concentration and axial solids velocity in
gas-solids two-phase flows", Powder Technol., vol. 87, pp. 127-137,
1996.
[15] H. Zhang, P.M. Johnston, J. X. Zhu, H. I. D. e. Lasa, M. A. Bergougnou,
"A novel calibration procedure for a fiber optic solids concentration
probe", Powder Technol., vol. 100, pp. 260-270,1998.
[16] H. Johnsson, F. Johnsson, "Measurements of local solids
volume-fraction in fluidized bed boilers", Powder Technol., vol. 115, pp.
13-18, 2001.
[17] F Wei, H Lin, Y Cheng, Y Jin, Z Yu, "Profiles of Particle Velocity and
Solids Fraction in a High Density Riser", Powder Technol., vol. 100, pp.
183-193, 1998.
[18] D. Gidspow, B. Ettehadieh, " Fluidization in two dimensional beds with
a jet: Part Ôàí . Hydrodynamic modeling" , Ind. Eng. Chem. Fundam.,
vol. 22, pp. 193-201, 1983.
[19] J. A. M. Kupiers, H. Tammes, W. Princs, W. P. M. van Swaaij,
"Experimental and theoretical porosity profiles in two dimensional
gas-fluidized bed with a central jet", Powder Technol., vol. 71, pp.
87-92, 1992.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:54429", author = "Biao Wang and Tao Li and Qi-Wen Sun and Wei-Yong Ying and Ding-Ye Fang", title = "Experimental Investigation on Solid Concentration in Gas-Solid Circulating Fluidized Bed for Methanol-to-Olefins Process", abstract = "Methanol-to-olefins coupled with transformation of
coal or natural gas to methanol gives an interesting and promising way
to produce ethylene and propylene. To investigate solid concentration
in gas-solid fluidized bed for methanol-to-olefins process catalyzed by
SAPO-34, a cold model experiment system is established in this paper.
The system comprises a gas distributor in a 300mm internal diameter
and 5000mm height acrylic column, the fiber optic probe system and
series of cyclones. The experiments are carried out at ambient
conditions and under different superficial gas velocity ranging from
0.3930m/s to 0.7860m/s and different initial bed height ranging from
600mm to 1200mm. The effects of radial distance, axial distance,
superficial gas velocity, initial bed height on solid concentration in the
bed are discussed. The effects of distributor shape and porosity on
solid concentration are also discussed. The time-averaged solid
concentration profiles under different conditions are obtained.", keywords = "Branched pipe distributor, distributor porosity,gas-solid fluidized bed, solid concentration.", volume = "4", number = "8", pages = "482-7", }
