n-Hexane cracking on binderless zeolite HZSM-5 coated monolithic reactors

Antia, Jimmy E.; Israni, Kumar; Govind, Rakesh

doi:10.1016/s0926-860x(97)00010-0

Cited by 18 publications

(11 citation statements)

References 20 publications

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“…Zeolite materials are advantageous due to their acidic nature and shape-selective behavior [134]. However, as fine powders or pellets in catalytic reactions, zeolites can be subjected to high pressure drops and also attrition in reactors [135]. Monoliths can serve as excellent supports for zeolites due to their lower pressure drop and better mechanical stability [136].…”

Section: Zeolite-based Monolithsmentioning

confidence: 99%

“…Furthermore, the addition of silica as a binder can lead to improved activity and selectivity, when tested for NO x reduction [148]. On the other hand, it is suggested that adding a binder could result in a larger diffusional distance to the active site, thus decreasing the catalytic activity [135,149]. Also, a binder such as Al(NO 3 ) 3 , when used for a PtCo-ZSM-5 coating onto monolith, can interact with cobalt and form cobalt aluminate species that can decrease the catalytic activity [150].…”

Section: Coating Zeolites Onto Monolithsmentioning

confidence: 99%

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Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

2017

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Considerable research has been conducted on monolithic catalysts for various applications. Strategies toward coating monoliths are of equal interest and importance. In this paper, the preparation of monoliths and monolithic catalysts have been summarized. More specifically, a brief explanation for the manufacturing of ceramic and metallic monoliths has been provided. Also, different methods for coating γ-alumina, as a secondary support, are included. Techniques used to deposit metal-based species, zeolites and carbon onto monoliths are discussed. Furthermore, monoliths extruded with metal oxides, zeolites and carbon are described. The main foci are on the reasoning and understanding behind the preparation of monolithic catalysts. Ideas and concerns are also contributed to encourage better approaches when designing these catalysts. More importantly, the relevance of monolithic structures to reactions, such as the selective oxidation of alkanes, catalytic combustion for power generation and the preferential oxidation of carbon monoxide, has been described.

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Section: Zeolite-based Monolithsmentioning

confidence: 99%

Section: Coating Zeolites Onto Monolithsmentioning

confidence: 99%

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

2017

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“…488,489 A monolithic substrate, such as cordierite, was used to fabricate the reactor. The surface of the monolith substrate was coated with the zeolite before being mounted in a stainless-steel reactor.…”

Section: Zeolitic Silica-alumina Fcc Catalystsmentioning

confidence: 99%

Catalysis in the Upgrading of Fischer–Tropsch Syncrude

2010

Catalysis in the Refining of Fischer-Tropsch Syncrude

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The catalysis of conversion technologies that are found in most commercial Fischer–Tropsch upgrading and refining facilities are discussed. Four main classes of catalysis are considered, namely a) alkene oligomerisation, b) isomerisation and hydroisomerisation of alkanes and alkenes, c) cracking and hydrocracking, and d) hydrotreating. The focus is on catalysis, with aspects such as oxygenates, oxygenate related deactivation, commercial processes and Fischer–Tropsch application specifics being highlighted.

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“…[1][2][3][4][5][6] In particular, the zeolite-coating catalyst has been widely used as solid acid catalysts for many important reactions, such as selective catalytic reduction (SCR) of NO x , 7 n-hexane catalytic cracking, 8 disproportionation of toluene, 9 catalytic cracking of supercritical hydrocarbon fuels, 4,10,11 etc. [1][2][3][4][5][6] In particular, the zeolite-coating catalyst has been widely used as solid acid catalysts for many important reactions, such as selective catalytic reduction (SCR) of NO x , 7 n-hexane catalytic cracking, 8 disproportionation of toluene, 9 catalytic cracking of supercritical hydrocarbon fuels, 4,10,11 etc.…”

Section: Introductionmentioning

confidence: 99%

Vapor‐Phase Transport Crystallization of Micro‐HZSM‐5 Zeolite Coatings

et al. 2014

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A novel structured catalyst of binderless micro‐HZSM‐5 zeolite coating was prepared on stainless‐steeled tubes (i.d. 2 mm) through wash coating and vapor‐phase transport (VPT) crystallization method. The subsequent crystallization of amorphous SiO2 binders improved the coatings adhesion tremendously by more than 10 times with the least amount of binders (<20% by weight), attributed to the remarkably enhanced interlock by the formed Mordenite Framework Inverted structure between zeolite particles. Catalytic cracking of supercritical n‐dodecane (500°C, 4 MPa) was used to examine the catalytic performance of the coatings as prepared, indicating that MZC‐V0.2 exhibited a catalytic activity improvement by 8% and a decreased deactivation rate by 48%. The improved catalytic performance may result from its high acid sites amount by incorporating extra‐framework Al into HZSM‐5 framework, and the possible depressing of pore‐mouth deactivation through partial modification of surface acid sites during VPT treatment. This work provides a potential technique to prepare mechanically stable zeolite coatings with high catalytic activity but less binder usage.

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n-Hexane cracking on binderless zeolite HZSM-5 coated monolithic reactors

Cited by 18 publications

References 20 publications

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

Catalysis in the Upgrading of Fischer–Tropsch Syncrude

Vapor‐Phase Transport Crystallization of Micro‐HZSM‐5 Zeolite Coatings

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