Kinetic study of the methanol to olefin process on a SAPO-34 catalyst

Mehdi SEDIGHI, Kamyar KEYVANLOO

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PDF(755 KB)
Front. Chem. Sci. Eng. ›› 2014, Vol. 8 ›› Issue (3) : 306-311. DOI: 10.1007/s11705-014-1440-z
RESEARCH ARTICLE

Kinetic study of the methanol to olefin process on a SAPO-34 catalyst

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Abstract

In this paper, a new kinetic model for methanol to olefin process over SAPO-34 catalyst was developed using elementary step level. The kinetic model fits well to the experimental data obtained in a fixed bed reactor. Using this kinetic model, the effect of the most important operating conditions such as temperature, pressure and methanol space-time on the product distribution has been examined. It is shown that the temperature ranges between 400 °C and 450 °C is appropriate for propene production while the medium temperature (450 °C) is favorable for total olefin yield which is equal to 33%. Increasing the reactor pressure decreases the ethylene yield, while medium pressure is favorable for the propylene yield. The result shows that the ethylene and propylene and consequently the yield of total olefins increase to approximately 35% with decreasing the molar ratio of inlet water to methanol.

Keywords

methanol to olefin / SAPO-34 / kinetic modeling / elementary step

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Mehdi SEDIGHI, Kamyar KEYVANLOO. Kinetic study of the methanol to olefin process on a SAPO-34 catalyst. Front. Chem. Sci. Eng., 2014, 8(3): 306‒311 https://doi.org/10.1007/s11705-014-1440-z

References

[1]
Alwahabi S M, Froment G F. Conceptual reactor design for the methanol-to-olefins process on SAPO-3. Industrial & Engineering Chemistry Research, 2004, 43(17): 5112–5122
[2]
Marchi A J, Froment G F. Catalytic conversion of methanol to light alkenes on SAPO molecular sieves. Applied Catalysis, 1991, 71(1): 139–152
[3]
Dubois D R, Obrzut D L, Liu J, Thundimadathil J, Adekkanattu P M, Guin J A, Punnoose A, Seehra M S. Conversion of methanol to olefins over cobalt-, manganese- and nickel-incorporated SAPO-34 molecular sieves. Fuel Processing Technology, 2003, 83(1–3): 203–218
[4]
Lee Y J, Baek S C, Jun K W. Methanol conversion on SAPO-34 catalysts prepared by mixed template method. Applied Catalysis A, General, 2007, 329: 130–136
[5]
Lok B, Messina C, Patton R, Gajek R, Cannan T, Flanigen E. Silicoaluminophosphate molecular sieves: Another new class of microporous crystalline inorganic solids. Journal of the American Chemical Society, 1984, 106(20): 6092–6093
[6]
Park T Y, Froment G F. Kinetic modeling of the methanol to olefins process. 1. Model formulation. Industrial & Engineering Chemistry Research, 2001, 40(20): 4172–4186
[7]
Gayubo A G, Aguayo A T, Sánchez del Campo A E, Tarrío A M, Bilbao J. Kinetic modeling of methanol transformation into olefins on a SAPO-34 Catalyst. Industrial & Engineering Chemistry Research, 2000, 39(2): 292–300
[8]
Iordache O M, Maria G C, Pop G L. Lumping analysis for the methanol conversion to olefins kinetic model. Industrial & Engineering Chemistry Research, 1988, 27(12): 2218–2224
[9]
Park T Y, Froment G F. Kinetic modeling of the methanol to olefins process. 2. Experimental results, model discrimination, and parameter estimation. Industrial & Engineering Chemistry Research, 2001, 40(20): 4187–4196
[10]
Alwahabi S A, Froment G F. Single event kinetic modeling of the methanol-to-olefins process on SAPO-34. Industrial & Engineering Chemistry Research, 2004, 43(17): 5098–5111
[11]
Gayubo A G, Aguayo A T, Alonso A, Bilbao J. Kinetic modeling of the methanol-to-olefins process on a silicoaluminophosphate (SAPO-18) catalyst by considering deactivation and the formation of individual olefins. Industrial & Engineering Chemistry Research, 2007, 46(7): 1981–1989
[12]
Hutchings G J, Hunter R. Hydrocarbon formation from methanol and dimethyl ether: A review of the experimental observations concerning the mechanism of formation of the primary products. Catalysis Today, 1990, 6(3): 279–306
[13]
Al Wahabi S M. Conversion of methanol to light olefins on SAPO-34: Kinetic modeling and reactor design. Dissertation for the Doctoral Degree. Texas: Texas A&M University, 2003
[14]
Wu X, Anthony R G. Effect of feed composition on methanol conversion to light olefins over SAPO-34. Applied Catalysis A, General, 2001, 218(1–2): 241–250
[15]
van Niekerk M J, Fletecher J C Q, O’Connor C T. Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34. Applied Catalysis A, General, 1996, 138(1): 135–145
[16]
Wu X, Abraha M G, Anthony R G. Methanol conversion on SAPO-34: reaction condition for fixed-bed reactor.Applied Catalysis A, General, 2004, 260(1): 63–69

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