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Showing 1 to 15 of 15 for “"solid acid catalysts"”.
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Catalytic and adsorbent properties of solid acid catalysts studied by ammonia adsorption microcalorimetry
Solid acid catalysts are becoming of great importance within the chemical industry and their acidity is of great interest, as this determines their application, plus many of their catalytic properties can also be directly related with their acidity. There has been a drive towards heterogeneous …
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DEVELOPMENT OF MAGNETIC NANO-SIZE SOLID ACID CATALYSTS FOR THE PRODUCTION OF BIOFUEL
… CLEANER ALTERNATIVE TO PETROLEUM-BASED FUELS. ACID CATALYSTS HAVE BEEN WIDELY USED FOR THE KEY REACTIONS IN BIOFUEL PRODUCTION. NEVERTHELESS, THE CURRENTLY AVAILABLE HOMOGENEOUS AND HETEROGENEOUS ACID CATALYSTS SUFFER FROM MANY DRAWBACKS. IN THIS THESIS, NOVEL ACID-FUNCTIONALIZED MAGNETIC …
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SYNTHESIS AND CHARACTERIZATION OF SUPPORTED SOLID ACID CATALYSTS FOR CONVERSION OF GREEN SEED CANOLA OIL TO BIODIESEL
… source, is traditionally produced using alkaline catalysts which are limited to the use of refined vegetable oil feedstocks. The process tends to be environmentally non-benign because of undesired side reactions. It is important that this bioenergy is harnessed in a sustainable way. Heterogeneous …
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An Examination of γ-valerolactone Ring Opening and Decarboxylation in Multiphase System and Over Various Solid Acid Catalysts
… commercial potentials. Of interest here is the acid-catalyzed ring opening of GVL to form pentenoic acid (PEA) isomers and following decarboxylation to produce butenes. In this study, GVL ring opening, and decarboxylation are examined in both liquid and gas phases over various catalytic systems …
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An Examination Of Γ-valerolactone Ring Opening And Decarboxylation In Multiphase System And Over Various Solid Acid Catalysts
… commercial potentials. Of interest here is the acid-catalyzed ring opening of GVL to form pentenoic acid (PEA) isomers and following decarboxylation to produce butenes. In this study, GVL ring opening, and decarboxylation are examined in both liquid and gas phases over various catalytic systems …
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Chemical modification of petroleum coke and applications of derived materials
… is a by-product from the oil industry and is a solid product mainly composed of carbon (> 80 wt%) with some impurities. These impurities, in particular sulfur, limit petcoke as feedstock for the application-like fuel. The aim of this thesis was to explore the possible application of petcoke …
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Catalytic Production of Furfural by the Subcritical Hydrothermal Gasification of Flax Straw
… hydrothermal gasification of flax straw using a solid acid catalyst. This study focused on the catalytic subcritical hydrothermal gasification of flax straw. The study was performed using a 600 mL autoclave batch reactor using flax straw with a fixed weight (10 g) in all the experimental runs. …
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Catalysts for the Positional Isomerization of Internal, Long-Chain Olefins
… work, the properties that enable long-lasting solid acid catalysts (both commercial and lab-synthesized) were identified, the efficacy of regenerated solid acid catalysts was tested, and the feasibility of organometallic chain-walking catalysts (both homogeneous and polymer-supported) for …
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The measurement and modelling of the intracrystalline diffusion of cyclohexane in ZSM-5 using zero length column chromatography
Zeolites are important solid acid catalysts largely because of their microporous nature giving them strong shape selective properties. This shape selectivity may be improved by depositing an inert (e. g. silaceous) layer on the surface of the catalyst crystals, which inertises non-shape selective …
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Methanol amination over hydrothermally treated zeolites RHO and Modernite
… groups as well as being used on their own. The acid catalysed amination of methanol generally yields a thermodynamically controlled product distribution. The equilibrium distribution for mono-, di-, and trimethylamine (MMA, DMA, and TMA), at 325°C and a molar methanol to ammonia ratio of 1, is …
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Supramolecular templating of mesoporous zirconia-based nanocomposite catalysts
Acid catalysis forms the basis of major hydrocarbon reactions in the petroleum industry, including paraffin isomerization, catalytic cracking, and alkylation. The environmental problem associated with the refining of hydrocarbons stems from the corrosive catalysts relied upon by many acid catalytic …
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Scaling down direct dimethyl ether synthesis for biogas conversion
… over CuO/ZnO/Al203 (CZA) and 1 % Au/CeZr04 catalysts and it was found that the gold based catalysts are superior to the copper based catalysts for low temperature WGS. The kinetics of the WGS reaction over fresh gold based catalyst and the deactivation kinetics model was then studied. It was …
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Membrane Surface Engineering for Biochemical Applications
… Duel nanostructures, poly styrene sulfonic acid (PSSA) and poly ionic liquid (PIL) were grafted separately and neighborly from the surface of ceramic membrane substrate by control ATRP and UV initiated radical polymerization. Modified membrane substrates were challenged with cellulose and …
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Advancing plastics reutilization via catalytic hydroconversion
… This thesis aims to develop high-performance catalysts for polyolefin hydroconversion, elucidate the reaction networks and mechanism, and identify catalyst descriptors to control the deconstruction catalysis. ☐ The first focus of this dissertation is the development and fundamental …
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Study of Adsorbate Interactions of Alumina Surfaces Using Nuclear Magnetic Resonance Methods
… with a growing demand for environmentally benign solid acid catalysts to replace toxic and corrosive liquid solvents for a wide range of applications including renewable energy production, fine chemicals and petrochemicals. Given the complexity and amorphous nature of gamma-Al2O3, the role of …