The catalytic isomerization of 1-hexene on H-ZSM-5 zeolite: The effects of a shape-selective catalyst

Abbot, J.; Corma, Avelino; Wojciechowski, B. W.

doi:10.1016/0021-9517(85)90273-8

Cited by 57 publications

(20 citation statements)

References 13 publications

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“…Furthermore, a great fraction of the aromatics produced contain nine carbons (see Figure S6) and were also detected trapped in the ZSM-5 framework (see Figure S12A). This C 9 aromatics fraction is likely formed via direct cyclization of adsorbed nonene that typically takes place through carbenium ion intermediates. ,− Additionally, as double bond isomerizations are known to readily occur, − the other n -nonene compounds are also included in this study.…”

Section: Resultsmentioning

confidence: 99%

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO₂ to Light Olefins and Aromatics

et al. 2019

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The direct transformation of CO2 into high-value-added hydrocarbons (i.e., olefins and aromatics) has the potential to make a decisive impact in our society. However, despite the efforts of the scientific community, no direct synthetic route exists today to synthesize olefins and aromatics from CO2 with high productivities and low undesired CO selectivity. Herein, we report the combination of a series of catalysts comprising potassium superoxide doped iron oxide and a highly acidic zeolite (ZSM-5 and MOR) that directly convert CO2 to either light olefins (in MOR) or aromatics (in ZSM-5) with high space–time yields (STYC2‑C4= = 11.4 mmol·g–1·h–1; STYAROM = 9.2 mmol·g–1·h–1) at CO selectivities as low as 12.8% and a CO2 conversion of 49.8% (reaction conditions: T = 375 °C, P = 30 bar, H2/CO2 = 3, and 5000 mL·g–1·h–1). Comprehensive solid-state nuclear magnetic resonance characterization of the zeolite component reveals that the key for the low CO selectivity is the formation of surface formate species on the zeolite framework. The remarkable difference in selectivity between the two zeolites is further rationalized by first-principles simulations, which show a difference in reactivity for crucial carbenium ion intermediates in MOR and ZSM-5.

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Section: Resultsmentioning

confidence: 99%

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO₂ to Light Olefins and Aromatics

et al. 2019

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“…[1][2][3][4][5][6] A handful of industrially relevant zeolites, including zeolite Y and ZSM-5, are extensively used in processes such as hydrocarbon cracking, isomerization, and alkylation. [7][8][9] Therefore, as the unique catalytic properties of zeolites rely to a great extent on molecular diffusion and accessibility of acid sites, a great number of studies has focused on the improvement of these properties. [10,11] Examples include the synthesis of nanocrystals and exfoliating layered zeolites.…”

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Architecture‐Dependent Distribution of Mesopores in Steamed Zeolite Crystals as Visualized by FIB‐SEM Tomography

et al. 2011

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“…This C 12 = intermediate subsequently cracks into either C 9 = and C 3 = , C 8 = and C 4 = , or C 7 = and C 5 = . The olefins produced by cracking can thereby undergo consecutive reactions, like the cracking of C 9 = to C 6 = and C 3 = olefins. , By analysis of the liquid residue of all conducted experiments on ZSM-5, Abbot and Wojciechowski , concluded that no olefins larger than C 12 = are obtained with a hexene feed. Using a pentene feed, C 10 = is the largest detected hydrocarbon .…”

Section: Experimental Datamentioning

confidence: 99%

Single-Event Kinetic Model for Cracking and Isomerization of 1-Hexene on ZSM-5

Aretin

Hinrichsen

2014

Ind. Eng. Chem. Res.

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The single-event kinetic modeling approach is applied to olefins cracking. Experimental data from the literature are used for model development and identification of the reaction pathways in olefins cracking. A detailed product spectrum from a 1-hexene feed on ZSM-5 gives insight into the reactivity through the fractions of 20 different product olefins and the combined C 7 = −C 12 = olefins. The reaction network comprising all possible elementary reactions on ZSM-5 is generated using a matrix notation. Single-event rate constants for cracking and isomerization of 1-hexene are determined from parameter estimation. The results show the capability of the modeling approach to reproduce the complex product distribution observed on ZSM-5.

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The catalytic isomerization of 1-hexene on H-ZSM-5 zeolite: The effects of a shape-selective catalyst

Cited by 57 publications

References 13 publications

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO₂ to Light Olefins and Aromatics

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO₂ to Light Olefins and Aromatics

Architecture‐Dependent Distribution of Mesopores in Steamed Zeolite Crystals as Visualized by FIB‐SEM Tomography

Single-Event Kinetic Model for Cracking and Isomerization of 1-Hexene on ZSM-5

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The catalytic isomerization of 1-hexene on H-ZSM-5 zeolite: The effects of a shape-selective catalyst

Cited by 57 publications

References 13 publications

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO2 to Light Olefins and Aromatics

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO2 to Light Olefins and Aromatics

Architecture‐Dependent Distribution of Mesopores in Steamed Zeolite Crystals as Visualized by FIB‐SEM Tomography

Single-Event Kinetic Model for Cracking and Isomerization of 1-Hexene on ZSM-5

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Product

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Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO₂ to Light Olefins and Aromatics

Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO₂ to Light Olefins and Aromatics