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Showing 1 to 14 of 14 for “"γ-Alumina"”.
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Ultrasonic and electroplating approach for washcoat of γ-alumina and nickel oxide (nio) catalyst on fecral substrate for catalytic converter
One of the technological advances was concentrated on the removal of pollutants from exhaust system by Three-Way Catalytic Converter (CATCO). Metallic material potential to replace the ceramic material, therefore FeCrAl substrate used as metallic material and γ-Al2O3 as washcoat material and NiO …
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Applying NMR Relaxation Methods to the Study of Liquids in Porous Media
… Principally, this study is centred on γ-alumina, which is used industrially as both a catalyst and a catalyst support. Ratios of fixed field T1 and T2 values were compared with fast field cycling (FFC-) NMR measurements. For each technique the relative advantages and disadvantages were …
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Catalytic Production of Furfural by the Subcritical Hydrothermal Gasification of Flax Straw
… acid catalysts 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 …
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Dynamics of liquids in porous media: Investigating competitive adsorption using NMR relaxometry
… and catalyst supports, namely anatase titania, γ-alumina and silica. The main NMR relaxometry method that was applied was Fast Field Cycling (FFC) NMR, which has been shown to quantitatively probe surface-adsorbate interactions of liquids in porous media. First, a model study of binary liquid …
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Coating of catalyst supports: links between slurry characteristics, coating process and final coating quality
… automatic film application is used for coating γ–alumina slurries onto Fecralloy®, an integral component of metallic monolith catalysts, to achieve the desired coating properties. Upon coating of the Fecralloy® coupons, the samples preoxidised for 10 h gave the best performance in terms of coating …
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ΜΕΛΕΤΗ ΤΗΣ ΥΔΡΟΛΥΣΗΣ, ΤΗΣ ΠΡΟΣΡΟΦΗΣΗΣ ΚΑΙ ΤΗΣ ΔΙΑΣΠΑΣΗΣ ΤΩΝ ΦΥΤΟΦΑΡΜΑΚΩΝ METHYL-PARATHION, LINDANE ΚΑΙ ATRAZINE ΣΕ ΦΥΣΙΚΑ ΥΠΟΣΤΡΩΜΑΤΑ
… ORE, KAOLLINITE, FLY ASH, RED MUD AND Γ-ALUMINA. THE ABILITY OF THESE SOLID SUBSTRATES FOR ADSORPTION AND DEGRADATION WAS PROVED THAT IT DEPENDS ON THEIR CHEMICAL FORMATION AND THEIR BASIC PHYSICOCHEMICAL CHARACTERISTICS (PH, SPECIFIC SURFACE AREA, NUMBER OF ACID SITES AND THE ZERO POINT …
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Theoretical and experimental studies related to the compositional and microstructural evolution of alumina thin films
… / microstructure for cathodic arc deposited alumina thin films is investigated. To contribute towards understanding this correlation, both theoretical and experimental investigations have been performed. The plasma, constituting the feed-stock material for the film growth, was characterized …
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[Ca₂₄Al₂₈O₆₄]⁴⁺(e⁻)₄ electride as a novel support system for iron-based Fischer-Tropsch synthesis
… and unpromoted precipitated iron diluted in γ-alumina were used as control/baseline catalysts. The testing of these catalysts was conducted at 240 °C and 15 bar with a 2:1 H₂/CO ratio. The electride and mayenite catalysts performed similarly with regards to hydrocarbon selectivities with the …
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Characterising Adsorption and Mass Transfer in Porous Media
… on porous oxides; in particular silicas and aluminas commonly used as catalyst supports. The techniques used are demonstrated to be capable of acquiring information relevant to the performance of heterogeneous catalysts and adsorbents across the hierarchy of length scales relevant to …
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SYNTHESIS AND CHARACTERIZATION OF SUPPORTED SOLID ACID CATALYSTS FOR CONVERSION OF GREEN SEED CANOLA OIL TO BIODIESEL
… into five phases. In phase one, commercial γ-alumina was tested for the heterogenization of HPW. HPW loading of 45 wt % was found to be optimum giving a methyl ester yield of 90.0 ± 2.8 wt % for biodiesel synthesis from refined canola oil under optimized reaction conditions that is 10 wt % of …
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DEVELOPMENT OF SUPPORTED COBALT CATALYST FOR FISCHER-TROPSCH SYNTHESIS
… high surface area and large pore size mesoporous alumina was synthesized and utilized as a support for Co catalyst. Stability of mesoporous alumina in the presence of aqueous and organic solvents during Co impregnation was examined and the corresponding catalysts were tested in FTS. Mesoporous …
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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 analyzed …
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Παραγωγή οργανικών οξέων από λιγνοκυτταρινούχα συστατικά με τη χρήση γ-αλούμινας ως προωθητή
Η παραγωγή αποβλήτων είναι ένα αναπόσπαστο κομμάτι της ανθρώπινης δραστηριότητας. Τα απόβλητα παράγονται από διάφορους τομείς συμπεριλαμβανομένων των βιομηχανιών, της δασοκομίας, της γεωργίας και των πόλεων. Η συσσώρευση αποβλήτων λόγω της απουσίας οικολογικής συνείδησης των περασμένων δεκαετιών …
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Παραγωγή οργανικών οξέων από τυρόγαλο παρουσία κίσσηρης και γ-αλουμίνας ως προωθητές
Στις μέρες μας παρατηρείται έντονο ενδιαφέρον για τη διαχείριση και την αξιοποίηση των αγροτοβιομηχανικών αποβλήτων πριν την απόρριψη τους στο περιβάλλον. Η αξιοποίηση του τυρογάλακτος, ένα από τα κύρια απόβλητα, για την ταυτόχρονη παραγωγή οργανικών οξέων και αιθανόλης μέσω διεργασίας αναερόβιας …