Dominant reaction pathway for methanol conversion to propene over high silicon H-ZSM-5

Wu, Wenzhang; Guo, Wenyao; Xiao, Wen‐De; Luo, Mingsheng

doi:10.1016/j.ces.2011.06.036

Cited by 98 publications

(48 citation statements)

References 40 publications

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“…For propylene, the lightest olefin investigated, trimolecular cracking was the dominant reaction. It was also observed that ethylene was only significantly produced from the monomolecular cracking of hexene and pentene, which extends the hypothesis proposed by Wu et al [21] who suggested that only hexene cracking accounts for ethylene formation. With this finding the reaction network has been greatly simplified by ignoring the insignificant reactions.…”

Section: Figure 8 Measured (Symbols) and Calculated (Lines) Data Obtasupporting

confidence: 68%

“…Therefore, the heptene content in the MTP product mixture was generally low, as observed by Wu et al [21,22], where heptene is defined as a terminal olefin of the olefin chain propagated by the methylation of methanol. Figure 4 Measured (symbols) and calculated (lines) data obtained when heptene was fed.…”

Section: R1mentioning

confidence: 70%

“…To reduce the effect of the secondary reaction of the products, the reaction was performed with a short space time to allow for a small conversion. The oligomerization of ethylene alone under the studied conditions is much more difficult to proceed than the oligomerization of other olefins and therefore is not notable in industrial processes [21]. As a result, the individual ethylene oligomerization was excluded, but its production from other olefins cracking was included.…”

Section: Catalyst Activity Testmentioning

confidence: 99%

“…The linear velocity was varied from 0.25 to 0.9 m/s, above the minimum value of 0.2 m/s to eliminate the effect of outer diffusion resistance [22]. The n-alcohol of C 3 -C 7 was used to substitute the corresponding alkene, as performed by Wu et al [21], because it is more convenient to obtain and control, especially for olefins higher than butene and for olefin mixtures. At the tested reaction temperature, the instantaneous dehydration of alcohols to alkenes upon coming into contact with the HZSM-5 catalyst was observed.…”

Section: Reaction Setup and Product Analysismentioning

confidence: 99%

“…Wu et al [21] analyzed the product distribution of C 2 -C 7 olefin transformation over high-silica HZSM-5 catalyst at 460ºC and proposed possible pathways for olefin conversion, but the mechanism needs further affirming and the temperature effects on product distribution remains unrevealed.…”

Section: Introductionmentioning

confidence: 98%

See 4 more Smart Citations

Reaction pathway and kinetics of C3–C7 olefin transformation over high-silicon HZSM-5 zeolite at 400–490°C

Huang

Aihemaitijiang

Xiao

2015

Chemical Engineering Journal

116

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Section: Figure 8 Measured (Symbols) and Calculated (Lines) Data Obtasupporting

confidence: 68%

Section: R1mentioning

confidence: 70%

Section: Catalyst Activity Testmentioning

confidence: 99%

Section: Reaction Setup and Product Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Reaction pathway and kinetics of C3–C7 olefin transformation over high-silicon HZSM-5 zeolite at 400–490°C

Huang

Aihemaitijiang

Xiao

2015

Chemical Engineering Journal

116

View full text Add to dashboard Cite

Modeling and analysis of the Lurgi‐type methanol to propylene process: Optimization of olefin recycle

Huang

et al. 2016

AIChE Journal

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This work proposed a strategy to improve the yield of light olefins of industrial methanol to propylene process by reducing the olefins recycled back into the main reactor and appending an olefin cracking reactor. The heterogeneous fixed‐bed model was employed to simulate the reactors with a robust mathematical procedure developed to determine the reactor configuration and the recycle flow rates of the olefins. Two methods were proposed for the modulation: the recycle ratio and species of the olefins, respectively. Results show that the yield of C2–C3 olefins can be improved up to 70% from the basement of about 60% when the ratio is reduced from 100% to less than 23% or when only butene apart from pentene and hexene is recycled back into the main reactor, and the latter method is more effective as its catalyst requirement is seven times less than the former's in the appended cracking reactor. © 2016 American Institute of Chemical Engineers AIChE J, 63: 306–313, 2017

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Kinetic modeling of methanol to olefins process over SAPO‐34 catalyst based on the dual‐cycle reaction mechanism

Yuan

et al. 2018

AIChE Journal

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A kinetic model for methanol to olefins (MTO) process over SAPO‐34 catalyst was established based on the dual‐cycle reaction mechanism. Simplifications were made by assuming olefins‐based cycle as virtual species S, and aromatics‐based cycle as R, where the former mainly accounts for the production of higher olefins, while the latter for lower olefins. Transformation of S to R was considered with the participation of methanol and olefins. Meanwhile, a phenomenological deactivation model was developed to account for the deactivation process. With the proposed model, the evolution of methanol conversion and product selectivity with time on stream could be predicted, and key reaction characteristics, such as the autocatalytic nature of the reaction, could also be captured due to its mechanism‐based nature. Further simulations of MTO reactors at different scales validated the robustness and applicability of the current model in MTO process development and optimization. © 2018 American Institute of Chemical Engineers AIChE J, 65: 662–674, 2019

show abstract

Dominant reaction pathway for methanol conversion to propene over high silicon H-ZSM-5

Cited by 98 publications

References 40 publications

Reaction pathway and kinetics of C3–C7 olefin transformation over high-silicon HZSM-5 zeolite at 400–490°C

Reaction pathway and kinetics of C3–C7 olefin transformation over high-silicon HZSM-5 zeolite at 400–490°C

Modeling and analysis of the Lurgi‐type methanol to propylene process: Optimization of olefin recycle

Kinetic modeling of methanol to olefins process over SAPO‐34 catalyst based on the dual‐cycle reaction mechanism

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