https://novaprd-lb.newcastle.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 A mechanistic study of the Knoevenagel condensation reaction: new insights into the influence of acid and base properties of mixed metal oxide catalysts on the catalytic activity https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:33941 Thu 24 Jan 2019 12:19:56 AEDT ]]> Bimetallic Co-Ni/Al₂O₃ catalyst for propane dry reforming: estimation of reaction metrics from longevity runs https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:9353 Sat 24 Mar 2018 08:36:34 AEDT ]]> Catalytic pyrolysis of CHF₃ over activated carbon and activated carbon supported potassium catalyst https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:9797 Sat 24 Mar 2018 08:10:03 AEDT ]]> Experimental and chemical kinetic study of the pyrolysis of trifluoroethane and the reaction of trifluoromethane with methane https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:9804 Sat 24 Mar 2018 08:10:02 AEDT ]]> Catalytic conversion of glycerol to allyl alcohol; effect of a sacrificial reductant on the product yield https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:17355 Sat 24 Mar 2018 08:01:41 AEDT ]]> Partial oxidation of methane with nitrous oxide forms synthesis gas over cobalt exchanged ZSM-5 https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:20583 Sat 24 Mar 2018 07:55:36 AEDT ]]> Evidence of the formation of surface palladium carbide during the catalytic combustion of lean methane/air mixtures https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:21245 Sat 24 Mar 2018 07:53:02 AEDT ]]> Fischer-Tropsch synthesis: effect of promoter type on alumina-supported Mo carbide catalysts https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:16044 Na–MoC₁₋ᵪ/Al₂O₃> Ce–MoC₁₋ᵪ/Al₂O₃> Co–MoC₁₋ᵪ/Al₂O₃> MoC₁₋ᵪ/Al₂O₃ while chain growth probability varied with feed composition and was enhanced by all promoters. The reaction rate data were adequately described by an Eley–Rideal model.]]> Sat 24 Mar 2018 07:50:07 AEDT ]]> Towards understanding the improved stability of palladium supported on TS-1 for catalytic combustion https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:26104 Sat 24 Mar 2018 07:39:52 AEDT ]]> Reaction of nitrous oxide with methane to synthesis gas: a thermodynamic and catalytic study https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:31030 4 with N2O, particularly at higher CH4 conversions. For this purpose, key process variables, such as temperature (300 °C–550 °C) and a molar feed ratio (N2O/CH4 = 1, 3, and 5), were altered to establish the conditions for maximized H2 yield. The experimental study was conducted over the Co-ZSM-5 catalyst in a fixed bed tubular reactor and then compared with the thermodynamic equilibrium compositions, where the equilibrium composition was calculated via total Gibbs free energy minimization method. The results suggest that molar feed ratio plays an important role in the overall reaction products distribution. Generally for N2O conversions, and irrespective of N2O/CH4 feed ratio, the thermodynamic predictions coincide with experimental data obtained at approximately 475 °C–550 °C, indicating that the reactions are kinetically limited at lower range of temperatures. For example, theoretical calculations show that the H2 yield is zero in presence of excess N2O (N2O/CH4 = 5). However over a Co-ZSM-5 catalyst, and with a same molar feed ratio (N2O/CH4) of 5, the H2 yield is initially 10% at 425 °C, while above 450 °C it drops to zero. Furthermore, H2 yield steadily increases with temperature and with the level of CH4 conversion for reactions limited by N2O concentration in a reactant feed. The maximum attainable (from thermodynamic calculations and at a feed ratio of N2O/CH4 = 3) H2 yield at 550 °C is 38%, whereas at same temperature and over Co-ZSM-5, the experimentally observed yield is about 19%. Carbon deposition on Co-ZSM-5 at lower temperatures and CH4 conversion (less than 50%) was also observed. At higher temperatures and levels of CH4 conversion (above 90%), the deposited carbon is suggested to react with N2O to form CO2.]]> Sat 24 Mar 2018 07:34:52 AEDT ]]> The stability of Co₃O₄, Fe₂O₃, Au/Co₃O₄ and Au/Fe₂O₃ catalysts in the catalytic combustion of lean methane mixtures in the presence of water https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:27130 -1 mimicking the typical flow and conversion requirements of a catalytic system designed to treat a ventilation air methane stream. In order to gain a better understanding of the interaction between H₂O and the catalyst surface, temperature-programmed desorption of water over fresh and used samples were studied, and supported by other catalyst characterization techniques such as N₂-adsorption desorption, XRD, TEM, SEM and XPS analyses. The activity measurements of the catalysts studied identify Co₃O₄ as the most active material. Co-precipitating gold particles with cobalt oxide or iron oxide do not enhance the activity of the catalyst, which is most likely due to blocking the active site of support by the gold particle. The presence of strong hydroxyl bonds on the catalyst surface is substantiated by TPD and XPS analyses, and is suggested to be responsible for the rapid deactivation of Fe₂O₃ and Au/Fe₂O₃ catalysts.]]> Sat 24 Mar 2018 07:33:03 AEDT ]]> Cobalt species active for nitrous oxide (N₂O) decomposition within a temperature range of 300-600°C https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:30564 2O conversion reactions within a temperature range of 300–600°C. These reactions were examined in a fixed bed tubular reactor. ZSM-5 (Si/ Al = 15), TS-1, and amorphous silicates were used as catalyst supports for cobalt loadings. All catalysts were prepared by following standard methods and recipes. In general, cobalt loading on supports was varied between 0.78 and 5.40 wt.-% (as determined from inductively coupled plasma (ICP) analysis). ICP, temperature programmed desorption, X-ray diffraction, and N2 adsorption/desorption isotherms were used for the characterization of prepared catalysts. Cobalt on ZSM-5 support generates weak and strong acid sites. Furthermore, for the Co-ZSM-5 catalyst, prepared by a wet deposition method, the N2O decomposition reaction is first order with an activation energy of ~132 kJ mol−1. Co2+ and Co3+ are the suggested active species for the N2O conversions in the studied range of temperatures.]]> Sat 24 Mar 2018 07:23:55 AEDT ]]> Conversion of halon 1211 (CBrCIF₂) over supported Pd catalysts https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3300 Sat 24 Mar 2018 07:22:24 AEDT ]]> Carbon deposition and gasification kinetics of used lanthanide-promoted Co-Ni/Al₂O₃ catalysts from CH₄ dry reforming https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:23773 Sat 24 Mar 2018 07:13:21 AEDT ]]> The stability of Pd/TS-1 and Pd/silicalite-1 for catalytic oxidation of methane – understanding the role of titanium https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:40905 Mon 25 Jul 2022 11:21:14 AEST ]]> Reaction of nitrous oxide with methane to produce synthesis gas (CO + H₂); a thermodynamic and catalytic analysis https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:18679 Mon 20 Jul 2015 17:34:13 AEST ]]> A proposed reaction mechanism for the selective oxidation of methane with nitrous oxide over Co-ZSM-5 catalyst forming synthesis gas (CO + H₂) https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:36460 Mon 11 May 2020 13:20:44 AEST ]]> Mechanistic insights into the Knoevenagel condensation reaction over ZnO catalysts: direct observation of surface intermediates using in situ FTIR https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:47765 Fri 27 Jan 2023 11:07:04 AEDT ]]>