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Open AccessReview

Kinetic Modeling of Catalytic Olefin Cracking and Methanol-to-Olefins (MTO) over Zeolites: A Review

1
Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85748 Garching near Munich, Germany
2
Catalysis Research Center, Technical University of Munich, Ernst-Otto-Fischer-Straße 1, 85748 Garching near Munich, Germany
*
Author to whom correspondence should be addressed.
Catalysts 2018, 8(12), 626; https://doi.org/10.3390/catal8120626
Received: 2 November 2018 / Revised: 26 November 2018 / Accepted: 27 November 2018 / Published: 5 December 2018
The increasing demand for lower olefins requires new production routes besides steam cracking and fluid catalytic cracking (FCC). Furthermore, less energy consumption, more flexibility in feed and a higher influence on the product distribution are necessary. In this context, catalytic olefin cracking and methanol-to-olefins (MTO) gain in importance. Here, the undesired higher olefins can be catalytically converted and, for methanol, the possibility of a green synthesis route exists. Kinetic modeling of these processes is a helpful tool in understanding the reactivity and finding optimum operating points; however, it is also challenging because reaction networks for hydrocarbon interconversion are rather complex. This review analyzes different deterministic kinetic models published in the literature since 2000. After a presentation of the underlying chemistry and thermodynamics, the models are compared in terms of catalysts, reaction setups and operating conditions. Furthermore, the modeling methodology is shown; both lumped and microkinetic approaches can be found. Despite ZSM-5 being the most widely used catalyst for these processes, other catalysts such as SAPO-34, SAPO-18 and ZSM-23 are also discussed here. Finally, some general as well as reaction-specific recommendations for future work on modeling of complex reaction networks are given. View Full-Text
Keywords: kinetics; kinetic model; microkinetics; cracking; methanol-to-olefins (MTO); zeolite; ZSM-5; ZSM-23; SAPO-18; SAPO-34 kinetics; kinetic model; microkinetics; cracking; methanol-to-olefins (MTO); zeolite; ZSM-5; ZSM-23; SAPO-18; SAPO-34
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Standl, S.; Hinrichsen, O. Kinetic Modeling of Catalytic Olefin Cracking and Methanol-to-Olefins (MTO) over Zeolites: A Review. Catalysts 2018, 8, 626.

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