Modeling of diffusion and reaction in monolithic catalysts for the methanol-to-propylene process

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

doi:10.1016/j.fuproc.2012.06.005

Cited by 35 publications

(21 citation statements)

References 23 publications

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“…The role of both cycles on a stable state catalyst depending on the conversion of DME has not yet been studied in detail: there are few investigations with stable catalyst at constant conversion only [24][25][26]. Detailed research into the chemistry over a partially deactivated and stable catalyst will allow development of a kinetic model and simulate the industrial reactor with the modification of the well-known lump models approaches [27,28].…”

Section: Introductionmentioning

confidence: 99%

Dimethyl Ether to Olefins over Modified ZSM-5 Based Catalysts Stabilized by Hydrothermal Treatment

et al. 2019

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The reaction of dimethyl ether to olefin over HZSM-5/Al2O3 catalysts modified by Zr and Mg and stabilized by hydrothermal treatment has been studied. Regardless of the introduction method and the nature of the metal, the dependence of the key products selectivity on X(DME) over hydrothermally treated steady-state catalysts does not change, and the experimental points are described by the same curves. Metal introduction and the corresponding changes in the acid sites distribution do not change the ratio of main reaction rates, only the absolute values of the formation rate of the products are changed. Zr doping leads to the greatest activity in the DME conversion due to an equable decrease in the total acidity of the sample. On the other hand, the Mg-modified sample has a higher amount of weak acid sites, which reduces activity. At low DME conversion, methanol is one of the primary reaction products which formed from DME simultaneously with propylene in alkene cycle. At high DME conversion, the methanol acts as a main reagent which leads to ethylene formation in the arene cycle. Based on the results, the role of the metal in the reaction chemistry is considered and the mechanism of product formation from DME over steady-state catalyst is proposed, which describes both the participation of DME and the methanol produced.

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Section: Introductionmentioning

confidence: 99%

Dimethyl Ether to Olefins over Modified ZSM-5 Based Catalysts Stabilized by Hydrothermal Treatment

et al. 2019

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“…Recently, Xiao et al proposed a lumped kinetic model consisting of 17 reactions and 15 species, in which light olefins are described separately to simulate their monolith methanol to propylene (MTP) reactor behavior. Wen et al established a kinetic model considering 19 reactions and 10 lumps to evaluate the MTP reaction over structured SS‐fiber@HZSM‐5 core‐shell catalyst.…”

Section: Introductionmentioning

confidence: 99%

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

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“…However, the product distribution remains almost unchanged in comparison to the particulate ZSM-5; in addition, the uniform growth of ZSM-5 on SiCfoam are greatly challenging due to the cellular geometry of SiC-foam [1]. Encouraged by the simulation calculation [11], a sinter-locked microfiber structured HZSM-5 Fig. 1 (Color online) The fiber/foam-structured catalysts engineered from nano-to macro-scale: non-dip-coating preparation, beneficial properties and research practices in heterogeneous catalysis catalyst of SS-fiber@HZSM-5 is fabricated by direct growth of HZSM-5 on a 3D microfibrous structure using 20-lm stainless steal fiber (SS-fiber) [12].…”

mentioning

confidence: 99%

Foam/fiber-structured catalysts: non-dip-coating fabrication strategy and applications in heterogeneous catalysis

Zhao

Liu

2016

Science Bulletin

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Modeling of diffusion and reaction in monolithic catalysts for the methanol-to-propylene process

Cited by 35 publications

References 23 publications

Dimethyl Ether to Olefins over Modified ZSM-5 Based Catalysts Stabilized by Hydrothermal Treatment

Dimethyl Ether to Olefins over Modified ZSM-5 Based Catalysts Stabilized by Hydrothermal Treatment

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

Foam/fiber-structured catalysts: non-dip-coating fabrication strategy and applications in heterogeneous catalysis

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