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Showing 1 to 20 of 61 for “"Steam Reforming"”.
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Nanocomposite catalysts for soot combustion and propane steam reforming
… 4), Re and V has been synthesized for propane steam reforming. Nickel aluminate nanocrystals with various Ni/Al molar ratios were prepared by chemical co-precipitation. They were pretreated in H2 prior to propane steam reforming to obtain highly dispersed Ni species. The Al in nickel aluminate …
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Studies of the Ethanol Steam Reforming Reaction in a Membrane Reactor
… (MRs). The reaction studied is the ethanol steam reforming (ESR) reaction using Co-Na/ZnO catalysts, chosen because of their high activity and stability. The Co-Na/ZnO catalysts were prepared by a co-precipitation method and it was found that promotion with a moderate amount of Na (1.0 wt%) …
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Developing an energy efficient steam reforming process to produce hydrogen from sulfur-containing fuels
… over 90% of hydrogen is produced from the steam reforming of natural gas. However, for many applications including fuel cell vehicles, the use of a liquid fuel rather than natural gas is desirable. This work investigates the feasibility of producing hydrogen efficiently by steam reforming …
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The oxidative reforming of methane to synthesis gas on a commercial steam reforming catalyst
The oxidative reforming of methane to predominantly carbon monoxide and hydrogen was studied over a commercial steam reforming catalyst. The said reaction was performed in an integral fixed-bed reactor at temperatures between 575°C and 650°C at a total pressure of 200 kPa(a). The primary objective …
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Development of bimetallic Pd-Zn catalysts for methanol steam reforming: hydrogen production for fuel cells
… Typically, Cu-based catalysts are used for steam reforming of methanol due to their high activity (i.e. H₂ production) and high selectivity towards CO₂. As CO poisons anodic catalyst of PEMFC, high selectivity towards CO₂ is crucial so as to eliminate or at least minimize CO removal load …
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Experimental and Modeling Studies of the Methane Steam Reforming Reaction at High Pressure in a Ceramic Membrane Reactor
… a membrane reactor for the study of the methane steam reforming reaction. The investigations include both experimental studies of the membrane permeation mechanism and theoretical modeling of mass transfer through the membrane and simulation of the membrane reactor with 1-D and 2-D models. A …
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Fabrication of Ultrathin Palladium Composite Membranes by a New Technique and Their Application in the Ethanol Steam Reforming for H₂ Production
… of the membranes is demonstrated in the ethanol steam reforming (EtOH SR) reaction in a membrane reactor (MR) for H₂ production. The membrane preparation technique uses an electric-field to uniformly deposit Pd nanoparticle seeds on a substrate followed by deposition of Pd or Pd-Cu layers on the …
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Investigation into the behaviour of a wash-coated PGM-based catalyst layer onto micro-channel reactors for the steam reforming of methane
… onto stainless steel micro-channels (MC) for the reforming of propane [24] was tested in the steam reforming of methane. The robustness of this method was unknown and was therefore tested for its possible application in methane steam reforming, which has far harsher reaction conditions. A 1 wt% …
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The autothermal reforming of artificial gasoline
… The production of hydrogen by the autothermal reforming of artificial gasoline has been studied. Part of gasoline is oxidised to produce heat and steam to promote the steam reforming of unburnt gasoline to produce hydrogen. The use of platinum impregnated on ceria supports (active for …
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Simulation and optimisation of industrial steam reformers. Development of models for both primary and secondary steam reformers and implementation of optimisation to improve both the performance of existing equipment and the design of future equipment.
… part of the system is usually quite detailed. Steam reforming, however, due to the `building block' nature of its reaction products is unusual and generally is perceived as a `utility' to other reaction processes and hence the focus is drawn " towards the 'main' reaction processes of the …
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Catalytic activation of Rh,Pd nanoclusters supported on Ceria
… excellent activity and stability for ethanol steam reforming (ESR) at 400°C. This thesis encompasses experimental and computational investigations of this nanocatalyst. The activation mechanism of Rh,Pd/CeO2 nanocatalysts under ethanol steam reforming conditions is unclear, though it has been …
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An Experimental Demonstration Of Converting Organic Liquids And Their Aqueous Solutions In A Film Boiling Reactor
… to explore if the FIBOR is capable of promoting steam reforming chemistry. The results show that the FIBOR has the potential to support both catalytic and thermal decomposition of aqueous ethylene glycol mixtures. Diluting ethylene glycol with water decreases the reaction of ethylene glycol but …
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Improvements to the biodiesel process
… transfer to increase ester yield. Experiments on steam reforming with glycerol and waste water over a platinum alumina catalyst were used to convert the combined waste product streams of a biodiesel plant. Mass spectroscopy with internal standard was chosen to measure reformer gas yield and …
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Gasification of in-Forest Biomass Residues
… that could be explained purely by steam reforming or steam reforming plus water gas shift chemistries. Methanation & Hydrogenation chemistry also occurred, but the mole fraction of CH4 never exceeded 10%. We hypothesize that the real-world biomass samples used here intrinsically …
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Novel routes for synthesis of Pd nanoparticles and faceted ZnO supports for heterogeneous catalysts
Alcohol steam reforming is a promising source of hydrogen as fuel, and could be improved by the use of an optimal catalyst. The methanol steam reforming reaction, CH3OH+H2O --> 3H2+CO2 frequently conducted by means of a Cu/ZnO catalyst. Unfortunately, this catalyst deactivates quickly and is …
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Renewable Electricity Generation via Solar-Powered Methanol Reforming: Hybrid Proton Exchange Membrane Fuel Cell Systems Based on Novel Non-Concentrating, Intermediate-Temperature Solar Collectors
… 250 °C, use this collector to power methanol steam reforming, and operate a proton exchange membrane (PEM) fuel cell using the generated hydrogen. The study presents the construction and characterization of a non-concentrating, intermediate-temperature, fin-in-tube evacuated solar collector, …
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Aerosol synthesis and Rietveld refinement of Pd2Zn
… to replace current Cu catalysts for methanol steam reforming. The change in selectivity to CO2 that makes this a possibility has been attributed to the formation of tetragonal β1-PdZn at treatment temperatures of 500oC. Through the course of studying the phase evolution of the 1:1 PdZn, it was …
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Platinum group metals catalyzed steam methane reforming via micro-channel reactor
Steam methane reforming is a well-established industrial process used for generating hydrogen and synthesis gas. By performing this reaction in micro-channel reactors it is possible to take advantage of increased heat and mass transfer rates, allowing equipment size and residence times to be …
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Multiscale computational simulation of multidimensional chemically reacting flow over washcoated heterogeneous catalysts
… heat transfer and detailed kinetics for methane steam reforming was built. The model is used to evaluate the kinetic and hydraulic performance of the reactor as well as explore potential catalyst degradation mechanisms. In situ adaptive tabulation (ISAT) is a technique for accelerating the …
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Development of supported nanocatalysts for hydrogen production technologies
… the preparation of Ru and Ru-Pt ethanol steam reforming catalysts from organometallic cluster precursors is described. The cluster-derived catalysts were found to be vastly superior to their conventional salt-derived counterparts in both catalytic activity and selectivity to hydrogen; …
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