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Kinetics of Nitrate Hydrogenation in Water on Alumina and Niobia Supported Palladium-Copper Catalysts
-
Joyce Barbosa Salazar
Published/Copyright:
July 3, 2012
Abstract
The kinetics of nitrate hydrogenation in water over niobia- and alumina-supported Pd-Cu catalysts were examined. A Langmuir-Hinshelwood kinetic model fitted concentration data, providing consistent kinetic and thermodynamic parameters. The kinetic model assumed a bimolecular surface reaction as the rate-determining step, with two types of sites. Pd-Cu/gamma-Al2O3 was active and selective under the reaction conditions. However, Pd-Cu/Nb2O5 deactivated during time on stream, and a deactivation function was added to the kinetic model to best fit the experimental data.
Published Online: 2012-7-3
©2012 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Keywords for this article
nitrate reduction;
kinetics of nitrate hydrogenation;
palladium-copper;
water remediation
Articles in the same Issue
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- A Comprehensive Review of Just Suspended Speed in Liquid-Solid and Gas-Liquid-Solid Stirred Tank Reactors
- On the Limitation of Fenton Oxidation Operational Parameters: A Review
- Article
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- Optimization of Fluidized Bed Reactor of Oxidative Coupling of Methane
- Reaction Engineering Studies of Homogeneous Rhodium-Catalyzed Methanol Carbonylation in a Laboratory Semi-Batch Reactor
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- MHD Flow of an Oldroyd-B Fluid Through a Porous Channel
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- Development of Torrefaction Kinetics for British Columbia Softwoods
- Effect of Lump Partitioning on the Accuracy of a Commercial Vacuum Gas Oil Hydrocracking Model
- PIV Study of Flow in an Aerated Tank with a Hollow Blade Turbine
- Heterogeneous Fenton-like Degradation of Orange II in Water Using FeZSM-5 Zeolite Catalyst
- Supercritical Activity Restoration for Fischer Tropsch Synthesis
- Kinetics Study of the Esterification of Acetic Acid with Methanol using Low-Corrosive Brønsted Acidic Ionic Liquids as Catalysts
- Statistical Analysis of Experimental Variables on Gas Holdup in Novel Bubble Column Using Box-Behnken Design
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- CFD Investigation of Hydrodynamic and Heat Transfer Phenomena around Trilobe Particles in Hydrocracking Reactor
- Combination of Design Equation and Kinetic Modeling for a Batch-Recirculated Photoreactor at Photooxidative Removal of C.I. Acid Red 17
- Study on Heat Transfer from a Bubbling Fluidized Bed Combustor to a Membrane Wall
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- Use of X-ray Tomography for the Experimental Verification of a Mathematical Model for the Recovery of Cu and Cd in a Flow-By Porous Electrode Reactor.
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- Simplified Simulation Model of a Biotrickling Filter Used for the Removal of Hydrogen Sulfide From Biogas
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- Experimental and reaction kinetic investigation of 1-octene metathesis reaction with Hoveyda-Grubbs first generation precatalyst
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- Kinetic Study of the Absorption of Carbon Dioxide by Aqueous Triethanolamine Solutions
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- Unsteady state maximun temperature estimation and localization in a tubular chemical reactor
- Thermodynamic Analysis of Glycerol Steam Reforming using Calcium Oxide and Iron Oxide for High-Purity Hydrogen Production
- Investigating the particle dispersion in a spout-fluid bed using particle trajectory
- Recovery of Boron from the Clay Waste of Boron Industry by Leaching
- Studies on Deactivation of the Catalyst in Direct Dimethyl Ether Synthesis
- Mass Transfer, Adsorption and Kinetics of the Photo-catalytic Degradation Reaction of the Dye Reactive Orange 16 on TiO2 Aqueous Suspension
- Modeling and Simulation of a Packed-bed Reactor for Carrying out the Water-Gas Shift Reaction
- The effect of acoustic field on the particle concentration profiles in fluidized bed
- The Process of Phenol Hydroxylation in the Water Solution and over the Ti-MWW Catalyst
- Effects of Preparation Approaches and Oxidizing agents on the Yield, Morphology and Thermal stability of Polyaniline
- Regeneration of Caramel Saturated Activated Carbon jointly by Microwave and Extractive Method
- Adsorption isotherms in landfill leachate treatment using powdered activated carbon augmented sequencing batch reactor technique: Statistical analysis by response surface methodology
- Short Communication or Note
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- Global Gibbs Free Energy Minimization in Reactive Systems via Harmony Search
- Benchmarking Radioactive Particle Tracking (RPT) with Laser Doppler Anemometry (LDA)
- Particle/Cordierite Monolithic Catalysts Dual-bed Reactor with Beds-interspace Supplementary Oxygen and Performance for Oxidative Coupling of Methane
- MFIP 2011
- Magneto-Stabilization of Fluidized Beds as due to Short Ranged Interparticle Forces
- Gas-Fluidization Characteristics of Binary Mixtures of Particles in 2D Geometry
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- Gas-liquid-solid Operation of a High Aspect Ratio Self-ingesting Reactor
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- A Numerical and Experimental Survey of a Liquid-Liquid Axial Cyclone
- Extended Validation of a Model of Segregating Fluidization of Homogeneous Two-Solid Beds
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- Validation and Application of Computational Modeling to Reduce Erosion in a Circulating Fluidized Bed Boiler