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A Study of Gas Flow in a Slurry Bubble Column Reactor for the DME Direct Synthesis: Mathematical Modeling from Homogeneity vs. Heterogeneity Point of View | ||
| Journal of Chemical and Petroleum Engineering | ||
| مقاله 1، دوره 49، شماره 1، شهریور 2015، صفحه 1-12 اصل مقاله (470.77 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jchpe.2015.9957 | ||
| نویسندگان | ||
| Mohammad Kazemeini* 1؛ Moslem Fattahi2؛ Leila Vafajoo3 | ||
| 1Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Avenue, Tehran, Iran | ||
| 2Department of Chemical Engineering, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran | ||
| 3Chemical & Environmental Engineering Group, Graduate Faculty of Engineering, Islamic Azad University, South Tehran Branch. Tehran, Iran | ||
| چکیده | ||
| In the present study, a heterogeneous and homogeneous gas flow dispersion model for simulation and optimization of a large-scale catalytic slurry reactor for the direct synthesis of dimethyl ether (DME) from synthesis gas (syngas) and CO2, using a churn-turbulent regime was developed. In the heterogeneous flow model, the gas phase was distributed into two bubble phases including small and large while in the homogeneous one, the gas phase was distributed into only one large bubble phase. The results indicated that the heterogeneous gas flow model was in a better agreement with experimental pilot-plant data compared with that of the homogeneous one. Also, through investigating the heterogeneous gas flow for small bubbles as well as the large bubbles in the slurry phase (i.e.; including paraffins and the catalyst), the temperature profile along the reactor was obtained. The optimum value of rector diameter and height obtained at 3.2 and 20 meters respectively. The effects of operating variables on the axial catalyst distribution, DME productivity and CO conversion were also understudied in this research. | ||
| کلیدواژهها | ||
| Dimethyl ether synthesis؛ Homogeneous and heterogeneous gas flow؛ modelling؛ Slurry bubble column1 | ||
| مراجع | ||
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[1] Semelsberger, T.A., Borup, R.L., Greene, H.L. (2005). "Dimethyl ether (DME) as an alternative fuel." J. Power Sources, No. 156, pp. 497-511.
[2] Ng, K.L., Chadwick, D. and Toseland, B.A. (1999). "Kinetics and modelling of dimethyl ether synthesis from synthesis gas." Chem Eng Sci, No. 54, pp. 3587-3592.
[3] Sosna, M.Kh., Sokollinskii, Yu.A., Shovkoplyas, N.Yu. and Korolev, E.V. (2007). "Application of the thermodynamic method to developing the process of producing methanol and dimethyl ether from synthesis gas." Theor Found Chem Eng, No. 41, pp. 809-815.
[4] Wang, W., Wang, S., Ma, X. and Gong, J. (2011). "Recent advances in catalytic hydrogenation of carbon dioxide." Chem Soc Rev, No. 40, pp. 3703-3727.
[5] An, X., Zuo, Y.-Z., Zhang, Q., Wang, D.-z. and Wang, J.-F. (2008). "Dimethyl ether synthesis from CO2 hydrogenation on a CuO-ZnO-Al2O3-ZrO2/HZSM-5 bifunctional catalyst." Ind Eng Chem Res, No. 47, pp. 6547-6554.
[6] Bulushev, D.A., Ross, J.R.H., (2011), "Catalysis for conversion of biomass to fuels via pyrolysis and gasification." Rev Cataly Today., No. 171, pp. 1-13.
[7] Ereña, J., Garoña, R., Arandes, J., Aguayo, M. A.T. and Bilbao, J. (2005). "Direct synthesis of dimethyl ether from (H2+CO) and (H2+CO2) feeds. Effect of feed composition." Int J Chem React Eng, No. 3(1), p. A44.
[8] Ereña, J., Garoña, Arandes, J.M., Aguayo, A.T. and Bilbao, J. (2005). "Effect of operating conditions on the synthesis of dimethyl ether over a CuO-ZnO-Al2O3/NaHZSM-5 bifunctional catalyst." Catal Today, No. 107-108, pp. 467-473.
[9] Flores, J.H., Peixoto, D.P.B., Appel, L.G., de Avillez, R.R. and Pais da Silva, M.I. (2011). "The influence of different methanol synthesis catalysts on direct synthesis of DME from syngas." Catal Today, Vol. 172, pp. 218-225.
[10] Stiefel, M., Ahmad, R., Arnold, U. and Döring, M. (2011). "Direct synthesis of dimethyl ether from carbon-monoxide-rich synthesis gas: Influence of dehydration catalysts and operating conditions." Fuel Process Technol, No. 92, pp. 1466-1474.
[11] Ereña, J., Sierra, I., Olazar, M., Gayubo, A.G. and Aguayo, A.T. (2008). "Deactivation of a CuO-ZnO- Al2O3/γ-Al2O3 catalyst in the synthesis of dimethyl ether." Ind Eng Chem Res, No. 47, pp. 2238-2247.
[12] Sierra, I., Ereña, J., Aguayo, A.T., Olazar, M. and Bilbao, J. (2010). "Deactivation kinetics for direct dimethyl ether synthesis on a CuO-ZnO-Al2O3/γ-Al2O3 catalyst." Ind Eng Chem Res, No. 49, pp. 481-489.
[13] Sierra, I., Ereña, J., Aguayo, A.T., Arandes, J.M. and Bilbao, J. (2010). "Regeneration of CuO-ZnO-Al2O3/γ-Al2O3 catalyst in the direct synthesis of dimethyl ether." Appl Catal B: Environ, No. 94, pp. 108-116.
[14] Fazlollahnejad, M., Taghizadeh, M., Eliassi, A., Bakeri, G. (2009). "Experimental study and modeling of an adiabatic fixed-bed reactor for methanol dehydration to dimethyl ether." Chin J Chem Eng, No. 17, pp. 630-634.
[15] Farsi, M., Eslamlueyan, R., Jahanmiri, A. (2011). "Modeling, simulation and control of dimethyl ether synthesis in an industrial fixed-bed reactor." Chem Eng Process: Process Intens, No. 50, pp. 85-94.
[16] Farsi, M., Mazinani, S., Jahanmiri, A. (2011). "Steady state operability characteristics of an adiabatic fixed-bed reactor for methanol dehydration." Iran J Chem Chem Eng, No. 30, pp. 45-50.
[17] Farsi, M., Jahanmiri, A. (2011). "Enhancement of DME production in an optimized membrane isothermal fixed-bed reactor." Int J Chem React Eng, No. 9, p. A74.
[18] Farsi, M., Jahanmiri, A., Eslamloueyan, R. (2010). "Modeling and optimization of MeOH to DME in isothermal fixed-bed reactor." Int J Chem React Eng, No. 8, p. A79.
[19] Omata, K., Ozaki, T., Umegaki, T., Watanabe, Y., Nukui, N., Yamada, M. (2003). "Optimization of the temperature profile of a temperature gradient reactor for DME synthesis using simple genetic algorithm assisted by a neural network, high-quality transportation fuels." Energy Fuel, No. 17, pp. 836-841.
[20] Kordabadi, H., Jahanmiri, A. (2005). "Optimization of methanol synthesis reactor using genetic algorithms." Chem Eng J, No. 108, pp. 249-255.
[21] Hartig, F., Keil, F.J. (1993). "Large-scale spherical fixed bed reactors." Ind Eng Chem Res, No. 32, pp. 424-437.
[22] Viecco, G.A., Caram, H.S. (2002). "The spherical reverse flow reactor." Chem Eng Sci, No. 57, pp. 4005-4025.
[23] Rahimpour, M.R., Abbasloo, A., Sayyad Amin, J. (2008). "A novel radial-flow, spherical-bed reactor concept for methanol synthesis in the presence of catalyst deactivation." Chem Eng Technol, No. 31, pp.1615-1629.
[24] Farsi, M., Asemani, M., Rahimpour, M.R. (2014). "Mathematical modeling and optimization of multi-stage spherical reactor configurations for large scale dimethyl ether production." Fuel Process Technol, No. 126, pp. 207-214.
[25] Chen, Z., Zhang, H., Ying, W., Fang, D. (2010). "Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor." Front Chem Eng, No. 4, pp. 461-471.
[26] Liu, D., Hua, X., Fang, D. (2007). "Mathematical simulation and design of three-phase bubble column reactor for direct synthesis of dimethyl ether from syngas." J Nat Gas Chem, No. 16, pp.193-199.
[27] Maretto, C., Krishna, R. (1999). "Modelling of a bubble column slurry reactor for Fischer-Tropsch synthesis." Catal Today, No. 52, pp. 279-289.
[28] Maretto, C., and Krishna, R. (2001). "Design and optimisation of a multi-stage bubble column slurry reactor for Fischer-Tropsch synthesis." Catal Today, No. 66, pp. 241-248.
[29] Reilly, I.G., Scott, D.S., W Debruijn, T.J., Macintyre, D. (1994). "The role of gas phase momentum in determining gas holdup and hydrodynamic flow regimes in bubble column operations." Can J Chem Eng, No. 72, pp. 3-12.
[30] Krishna, R., De Swart, J.W.A., Ellenberger, J., Martina, G.B., Maretto, C. (1997). "Gas holdup in slurry bubble columns: Effect of column diameter and slurry concentrations." AIChE J, No. 43, pp. 311-316.
[31] Vermeer, D.J., Krishna, R., (1981). "Hydrodynamics and mass transfer in bubble columns operating in the churn-turbulent regime." Ind Eng Chem Des Deve, No. 20, pp. 475-482.
[32] Smith, D.N., Ruether, J.A. (1985). "Dispersed solid dynamics in a slurry bubble column." Chem Eng Sci, No.40, pp.741-753.
[33] De Swart, J.W.A., van Vliet, R.E., Krishna, R. (1996). "Size, structure and dynamics of “large” bubbles in a two-dimensional slurry bubble column." Chem Eng Sci, No. 51, pp.4619-4629.
[34] Field, R.W., Davidson, J.F. (1980) "Axial dispersion in bubble columns." T I Chem Eng, No. 58, pp. 228-235.
[35] Deckwer, W.-D., Schumpe, A. (1993). "Improved tools for bubble column reactor design and scale-up." Chem Eng Sci, No. 48, pp. 889-911.
[36] Wang, T., Wang, J. "Numerical simulations of gas-liquid mass transfer in bubble columns with a CFD-PBM coupled model." Chem Eng Sci, No. 62, pp. 7107-7118.
[37] Yagi, H., Ohno, Y., Inoue, N., Okuyama, K., Aoki, S. (2010). "Slurry phase reactor technology for DME direct synthesis." Int J Chem React Eng, No. 8, p. A109.
[38] Papari, S., Kazemeini, M., Fattahi, M. (2012). "Mathematical modeling of a slurry reactor for DME direct synthesis from syngas." J Nat Gas Chem, No. 21, pp. 148-157.
[39] Papari, S., Kazemeini, M., Fattahi, M. (2013). "Modelling-based optimisation of the direct synthesis of dimethyl ether from syngas in a commercial slurry reactor." Chinese J Chem Eng, No. 21, pp. 611-621. | ||
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