Thermodynamic equilibrium distribution of light olefins in catalytic pyrolysis

Zhang, Rui; Liu, Haiyan; Liu, Zhichang; Liu, Guili; Meng, Xianghai

doi:10.1016/j.apcata.2016.05.009

Cited by 13 publications

(6 citation statements)

References 22 publications

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“…Moreover, in a purely monomolecular cracking, one would expect a constant butenes to ethene ratio (B/E) of one, at least at short contact times before light olefins interconvert or participate in other reactions (37,45). Indeed, our results show a B/E ratio close to one on all samples at low hexene partial pressure.…”

Section: Methodssupporting

confidence: 52%

Theta-1 zeolite catalyst for increasing the yield of propene when cracking olefins and its potential integration with an olefin metathesis unit

Blay

Miguel

Corma

2017

Catal. Sci. Technol.

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Section: Methodssupporting

confidence: 52%

Theta-1 zeolite catalyst for increasing the yield of propene when cracking olefins and its potential integration with an olefin metathesis unit

Blay

Miguel

Corma

2017

Catal. Sci. Technol.

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“…The differences in catalytic activity at low temperature were mainly due to crystalline phase effect, which leaded to different physical chemical properties. When the reaction temperature raised to 300 °C and above, the catalytic activity of catalysts NZ-W-500 and NZ-W-400 reached the thermodynamic equilibrium (calculated through Aspen Plus) and shifted to the maximum activity [48][49][50] . However, the catalytic activity of catalyst NZ-M-400 showed an upward trend since an increasing activated CO 2 molecules converted to CO at higher temperature [51,52] .…”

Section: Catalytic Performances and Tpsr Results Analysismentioning

confidence: 99%

CO 2 selective hydrogenation to synthetic natural gas (SNG) over four nano-sized Ni/ZrO 2 samples: ZrO 2 crystalline phase & treatment impact

Chen

Guo

Zheng

et al. 2016

Journal of Energy Chemistry

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“…Finally, insight into the influence of typical reaction conditions on equilibrium distributions might help in understanding overall reactivity. Thermodynamic equilibria are obtained by minimization of the total Gibb's free energy G t (T) (see Equation 1) [76][77][78]:…”

Section: Thermodynamicsmentioning

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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Thermodynamic equilibrium distribution of light olefins in catalytic pyrolysis

Cited by 13 publications

References 22 publications

Theta-1 zeolite catalyst for increasing the yield of propene when cracking olefins and its potential integration with an olefin metathesis unit

Theta-1 zeolite catalyst for increasing the yield of propene when cracking olefins and its potential integration with an olefin metathesis unit

CO 2 selective hydrogenation to synthetic natural gas (SNG) over four nano-sized Ni/ZrO 2 samples: ZrO 2 crystalline phase & treatment impact

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

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