4.8 Article

Ca/ZSM-5 catalysts for the methanol-to-hydrocarbons reaction: Activity - Selectivity trade-off?

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Chemistry, Applied

A scanning pulse reaction technique for transient analysis of the methanol-to-hydrocarbons reaction

Anna Liutkova et al.

Summary: This paper introduces a scanning pulse gas chromatography (SP-GC) method suitable for analyzing the transient response of catalysts to reactant pulses. Applied to methanol-to-hydrocarbons reaction over various zeolite-based catalysts, SP-GC provides quantitative information about the transient reactivity and selectivity. The analysis demonstrates differences in the relative rates of hydrocarbon formation between catalysts favoring aromatic or olefin cycles of the dual-cycle hydrocarbon pool mechanism. The influence of metal promoters on the main reaction pathways is highlighted, with a focus on mechanistic aspects.

CATALYSIS TODAY (2023)

Article Chemistry, Physical

Ca Cations Impact the Local Environment inside HZSM-5 Pores during the Methanol-to-Hydrocarbons Reaction

Anna Liutkova et al.

Summary: The presence of Ca2+ in zeolite catalysts modifies the local environment inside micropores, resulting in enhanced propylene selectivity in the methanol-to-hydrocarbons (MTH) process. Ca/ZSM-5 exhibits strong adsorption of water, hydrocarbons, and oxygenates, which occupy up to 10% of the micropores during the MTH reaction. This change in effective pore geometry affects the formation of hydrocarbon pool components and directs the MTH reaction towards the olefin cycle.

ACS CATALYSIS (2023)

Article Chemistry, Physical

Role of Strontium Cations in ZSM-5 Zeolite in the Methanol-to-Hydrocarbons Reaction

Anna Liutkova et al.

Summary: The selectivity of the methanol-to-hydrocarbons reaction can be modified by using alkaline earth metals to modify zeolite catalysts. Sr2+ was used as a catalyst and its higher atomic number facilitated characterization by scanning transmission electron microscopy and operando X-ray absorption spectroscopy. The presence of Sr2+ in the zeolite micropores during the reaction resulted in an increased adsorption of reactants compared to zeolites without Sr, explaining the increased propylene yield and lower deactivation rate.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2023)

Article Multidisciplinary Sciences

Mechanistic differences between methanol and dimethyl ether in zeolite-catalyzed hydrocarbon synthesis

Felix M. Kirchberger et al.

Summary: The presence of water critically influences the kinetics of methanol autocatalytic conversion to hydrocarbons in acid zeolites. The main reactions at the initiation stage involve hydrogen transfer from methanol and DME to surface methoxy groups, leading to methane and formaldehyde in a 1:1 stoichiometry. The kinetic analysis of CH4 formation rates can be used as a unique quantitative parameter to characterize catalyst activity in the methanol-to-hydrocarbon process.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2022)

Article Chemistry, Physical

Hydronium ion and water complexes vs. methanol on solid catalyst surfaces: how confinement influences stability and reactivity

Zheng Li et al.

Summary: Water and alcohols are important substrates in catalytic reactions, and adsorption on catalysts plays a crucial role in these reactions. This study investigates the influence of surface sites and confinement on the formation of water surface species, their adsorption strength, and complex stability. The results demonstrate that confinement is the key parameter for the formation of surface complexes and adjusting their protonation efficiency.

CATALYSIS SCIENCE & TECHNOLOGY (2022)

Article Chemistry, Multidisciplinary

Molecular Routes of Dynamic Autocatalysis for Methanol-to-Hydrocarbons Reaction

Shanfan Lin et al.

Summary: The study reveals the complete theoretical picture of the autocatalytic reaction network occurring on HZSM-5 zeolite, which facilitates catalyst design and process control for methanol-to-hydrocarbons technology.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Review Chemistry, Multidisciplinary

Applications of Zeolites to C1 Chemistry: Recent Advances, Challenges, and Opportunities

Qiang Zhang et al.

ADVANCED MATERIALS (2020)

Article Chemistry, Multidisciplinary

A Supramolecular View on the Cooperative Role of Bronsted and Lewis Acid Sites in Zeolites for Methanol Conversion

Simon Bailleul et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Review Chemistry, Physical

Engineering of Transition Metal Catalysts Confined in Zeolites

Nikolay Kosinov et al.

CHEMISTRY OF MATERIALS (2018)

Article Chemistry, Multidisciplinary

Structure-performance descriptors and the role of Lewis acidity in the methanol-to-propylene process

Irina Yarulina et al.

NATURE CHEMISTRY (2018)

Article Engineering, Multidisciplinary

New Trends in Olefin Production

Ismael Amghizar et al.

ENGINEERING (2017)

Article Chemistry, Physical

Impact of the Nature of Exchangeable Cations on LTA-Type Zeolite Hydration

Paula Gomez Alvarez et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2016)

Article Chemistry, Physical

Mechanism of the Catalytic Conversion of Methanol to Hydrocarbons

Samia Ilias et al.

ACS CATALYSIS (2013)

Review Chemistry, Multidisciplinary

Conversion of Methanol to Hydrocarbons: How Zeolite Cavity and Pore Size Controls Product Selectivity

Unni Olsbye et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2012)

Article Chemistry, Applied

Product yield in methanol conversion over ZSM-5 is predominantly independent of coke content

Francesca L. Bleken et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2012)

Article Chemistry, Applied

Well-defined (supra)molecular structures in zeolite methanol-to-olefin catalysis

JF Haw et al.

TOPICS IN CATALYSIS (2005)

Review Chemistry, Multidisciplinary

Reaction progress kinetic analysis: A powerful methodology for mechanistic studies of complex catalytic reactions

DG Blackmond

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2005)