Investigation of the preparation and catalytic activity of supported Mo, W, and Re oxides as heterogeneous catalysts in olefin metathesis

Gholampour, Nadia; Yusubov, Mekhman S.; Verpoort, Francis

doi:10.1080/01614940.2015.1100871

Cited by 40 publications

(28 citation statements)

References 164 publications

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“…These relatively inexpensive catalysts are widely used, especially in large-scale petrochemical processes. With the discovery of new advanced supports, such as zeolites and mesoporous molecular sieves, molybdenum and tungsten oxides particularly attracted the attention of many research groups in their efforts to increase the effectiveness of commercially important catalysts [9,63]. Several studies showed that various mesoporous siliceous materials (MCM-41 [15,64,65], KIT-6 [66]), or MWW-zeolites [65,67], and MFI-zeolites [65,67,68] were substantially more active than ordinary silica or silica-alumina.…”

Section: Heterogeneous Olefin Metathesis Catalysts Consisting Of Mo Amentioning

confidence: 99%

SBA-15 as a Support for Effective Olefin Metathesis Catalysts

Balcar

Čejka

2019

Catalysts

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Olefin metathesis is the catalytic transformation of olefinic substrates, finding a wide range of applications in organic synthesis. The mesoporous molecular sieve Santa Barbara Amorphous (SBA-15) has proven to be an excellent support for metathesis catalysts thanks to its regular mesoporous structure, high BET area, and large pore volume. A survey of catalysts consisting of (i) molybdenum and tungsten oxides on SBA-15, and (ii) molybdenum and ruthenium organometallic complexes (Schrock and Grubbs-type carbenes) on SBA-15 is provided together with their characterization and catalytic performance in various metathesis reactions. The comparison with catalysts based on other supports demonstrates the high quality of the mesoporous molecular sieve SBA-15 as an advanced catalyst support.

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Section: Heterogeneous Olefin Metathesis Catalysts Consisting Of Mo Amentioning

confidence: 99%

SBA-15 as a Support for Effective Olefin Metathesis Catalysts

Balcar

Čejka

2019

Catalysts

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“…There are different strategies for describing these effects mathematically. A common approach is the Langmuir (L) isotherm in Equation (13), which depends on the temperature T [118,124],…”

Section: Kinetic Modelingmentioning

confidence: 99%

“…Thus, alternative catalytic processes are necessary. Cracking of higher olefins [3], methanol-to-hydrocarbons (MTH) [11], olefin metathesis [12,13], propane dehydrogenation [14,15], oxidative dehydrogenation of propane [16] or ethene-to-propene [3,17] are amongst the most prominent alternative processes.…”

Section: Introductionmentioning

confidence: 99%

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

Hinrichsen

2018

Catalysts

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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.

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“…[16][17][18][19][20][21] It is widely accepted that the highly dispersed WO x species and its existing state on supports play critical roles in the catalytic performance. 22 The properties of supports and the preparation methods have a signicant effect on the structure and dispersion of WO x species, and thus signicantly inuence the catalytic performance. 23 Mesoporous materials, such as HMS, SBA-15, MCM-41, and FDU-12, have uniform pores, large BET surface areas and pore volumes, which are benecial for the dispersion of active species and the transportation of reactants and products.…”

Section: Introductionmentioning

confidence: 99%