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

Abstract

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.

Experimentelle und theoretische Betrachtungen der Methanol‐ und direkten DME‐Synthese im Labor‐ und Technikums‐Maßstab

“…Als Katalysator der direkten DME‐Synthese wird meist eine physikalische Mischung aus Katalysatoren für die MeOH‐Synthese und MeOH‐Dehydratisierung eingesetzt. Letztere sind hauptsächlich Aluminiumoxid und Aluminiumsilikat, aber auch Zeolithe geraten zunehmend in den Fokus .…”

Facile and Rapid Synthesis of Durable SSZ-13 Catalyst Using Choline Chloride Template for Methanol-to-Olefins Reaction

“…The methanol-to-olefins (MTO) reaction has been intensively studied in recent years with a particular focus on the development of highly reactive and durable catalysts [1][2][3]. Chabazite (CHA) zeolite with a favorable structure is expected to be an ideal candidate for the MTO reaction [4,5].…”

Effect of Ethanol on the Morphology and Textual Properties of ZSM-5 Zeolite

“…ZSM-5 zeolite shows a high thermal stability, anti-coke ability and excellent shape selectivity due to its acid property, exceptional skeleton and channel structure. It is widely used in petrochemical engineering [1][2][3][4][5], environmental pollution remediation [6,7] by adsorption and separation [8,9].…”