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Showing 1 to 16 of 16 for “"H-ZSM-5"”.
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Conversion of n-pentenes over H-ZSM-5
… importance. The conversion of I-pentene over H-ZSM-5 zeolite catalyst was studied in a fixed-bed micro reactor.
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Aromatization of alkenes by gallium/H-ZSM-5 zeolite catalysts
Gallium/H-ZSM-5 zeolite catalysts have been extensively researched for the aromatization of liquified petroleum gas (LPG). In 1989 BP and UOP collaborated to commission a pilot plant in Grangemouth, Scotland, for the aromatization of propane and butane. This plant, based on a technology called the …
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Catalytic cracking of n-alkanes and n-alkylbenzenes over H-ZSM-5 zeolite
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1993.
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The development of a model for high pressure propene oligomerisation over H-ZSM-5
… for high pressure propene oligomerisation over H-ZSM-5. To this end, this introductory chapter first revises the characteristics and applications of catalysts which have been shown to be active for oligomerisation. This is further split into acid catalysts, heterogeneous nickel catalysts, other …
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In situ ¹³C NMR monitoring of the dehydration of 2-propanol over H-ZSM-5
… described. The dehydration of 2-propanol over H-ZSM-5 was observed using solution type techniques. Although this produces broad lines, several mechanistic details were elucidated. This study indicates that: 1) the dehydration does not proceed through a cyclopropyl carbenium ion intermediate, 2) …
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Alkylation of phenol with methanol over H-ZSM-5, H-Beta, H-Mordenite, H-USY and H-MCM-22
Alkylphenols are intermediates used in the synthesis of many important substances. The most significant of the commercially important lower alkylphenols are cresols (methyl phenols) and xylenols (dimethyl phenols). The main markets for alkylphenol products are nonionic detergents, phenolic resins, …
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Dimerization of naphtha-range Fischer-Tropsch olefins into diesel-range products over zeolite H-ZSM-5 and amorphous silica-alumina
… reactor, in the liquid phase, over zeolite H-ZSM-5 and an amorphous silica-alumina (ASA) catalyst. Both catalysts were in the form of extrudates.
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Thymol synthesis via alkylation of m-cresol with isopropanol the effect of the SiO2/AI2O3 ratio of H-MFI catalysts on catalyst activity and thymol selectivity
… ration, i.e. the aluminium content of H-MFI (H-ZSM-5) zeolites. The results are interpreted based on a deep analysis of the reaction network.
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Untersuchungen an nickelhaltigen ZSM-5-Zeolith-Katalysatoren zur simultanen Stickoxidreduktion mit Propen
… und N2O an nickelbeladenen Zeolithen vom Typ H-ZSM-5 mit Propen als Reduktionsmittel untersucht. Die experimentellen Arbeiten wurden unter realitätsnahen Bedingungen mit einem Katalysatorbett durchgeführt. Der Einfluss des Nickelgehalts und der Acidität des zeolithischen Trägermaterials auf …
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Aromatization of light olefins and paraffins on pure and hybrid ZSM-5 catalysts
… hydrocarbons. It was found that when an acidic H-ZSM-5 zeolite with Si/Al atomic ratio equal to about 40, was mixed with a ZnO based co-catalyst, aromatization selectivity followed the principles of synergy. For a feed made up of mostly ethylene, as generated in a bench scale propane …
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Entwicklung einer neuen Methode zur impedanzspektroskopischen Erfassung der temperaturprogrammierten Desorption von Ammoniak in H-Form Zeolithen
… (NH3-TPD), the acidic properties of zeolites (H-ZSM-5 with SiO2/Al2O3 ratios from 30 to 1000). This new method, denoted IS-TPD, is based on a combination of NH3-TPD with impedance spectroscopy measurements (IS). The IS-TPD new method, with a zeolite sensor, is used for the NH3 detection instead …
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Degradação termocatalítica de misturas de poliolefinas e biomassa
… carried out with the catalysts SO4/SnO2_3x and H-ZSM-5 at 3/1, 2/1 and 1/1 ratios,evaluated the effects of each catalyst on the collected products yields. The SO4/SnO2_3x catalyst generated high liquid productsyields, while the zeolite producedhigh gas yield. The use of zeolite for pyrolysis of …
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CO2-Assisted Ethylene Production and Subsequent Purification: A Materials Development, Kinetic Assessment, and Process Performance Investigation
… and V<sub>2</sub>O<sub>5</sub>) supporting H-ZSM-5. The results indicated that higher cell densities lead to better performance due to kinetic enhancement, and the optimum configuration is separate stacking of the adsorbent and catalyst phases.</p> <p>In the second part of the research, an …
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Catalystic Pyrolysis for the Production of Stable Phenol Rich Bio-Oil from Wood Biomass
… (400,500, 6000C), acidic catalysts (H-ZSM-5, γ-alumina and silica alumina), feed size (0.71, 0.85, 1, 1.18 and 1.44mm) and catalyst weights (1g and 2g). For the kinetic study, experiments were carried out at varying residence times (0, 30, 60 and 90 minutes). Products were collected and …
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Catalytic Production of Furfural by the Subcritical Hydrothermal Gasification of Flax Straw
… were explored in this study: γ–alumina, H-ZSM-5, and silica-alumina. Experimental parameters such as temperature (200-325 oC), pressure (0-60 bar), residence time (0-120 min) and weight of solid acid catalysts (0.5-1.5 g) were varied in order to obtain the optimum conditions and to select …
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Spectroscopic and Kinetic Study of Copper-Exchanged Zeolites for the Selective Catalytic Reduction of NOx with Ammonia
… counts from n-propylamine decomposition over H-ZSM-5. In Cu-ZSM-5, the results also matched, suggesting the NH<sub>3</sub> procedures could also avoid titrating Cu sites. In H- and Cu-SSZ-13, the NH<sub>3</sub> titrations gave close to four times higher counts of Brønsted acid sites, suggesting …