Liu and Flytzani-Stephanopoulos [1] firstly introduced the catalytic systems based on copper oxide, supported on ceria, for the total oxidation of CO and CH4. Accordingly, this system displayed a substantially high activity and stability related to the oxidation of CO. Complete CO conversion occured at about 80 0 C at a space velocity of 45,000 h-1. Thus, in recent years, the high catalytic activity and selectivity of the CuO-CeO2 systems form the basis of their rising popular use in various reactions of environmental, commercial and other

No abstract

A compact and versatile laboratory tubular reactor has been designed and fabricated keeping in view of reducing capital cost and minimising energy consumption for gas/vapor-phase heterogeneous catalytic reactions. The reactor is consisted of two coaxial corning glass tubes with a helical coil of glass tube in between the coaxial tubes serving as vaporiser and pre-heater, the catalyst bed is in the inner tube. A schematic diagram of the reactor with detailed dimensions and working principles are described. The attractive feature of the reactor is that the vaporiser, pre-heater and fixed bed reactor are merged in a single compact unit. Thus, the unit minimises separate vaporiser and pre-heater, also avoids separate furnaces used for them and eliminate auxiliary instrumentation such as temperature controller etc. To demonstrate the system operation and illustrate the key features, catalyst screening data and the efficient collection of complete, and accurate intrinsic kinetic data are provided for oxidation of CO over copper chromite catalyst. CO oxidation is an important reaction for auto-exhaust pollution control. The suitability of the versatile nature of the reactor has been ascertained for catalytic reactions where either volatile or vaporizable feeds can be introduced to the reaction zone, e.g. oxidation of iso-octane, reduction of nitric oxide, dehydrogenation of methanol, ethanol and iso-propanol, hydrogenation of nitrobenzene to aniline, etc. Copyright (c) 2009 by BCREC. All Rights reserved.

[Received: 10 February 2009, Accepted: 9 May 2009]

[How to Cite: R. Prasad, G. Rattan. (2009). Design of a Compact and Versatile Bench Scale Tubular Reactor. Bulletin of Chemical Reaction Engineering and Catalysis, 4(1): 5-9. doi:10.9767/bcrec.4.1.1250.5-9]

[How to Link/ DOI: http://dx.doi.org/10.9767/bcrec.4.1.1250.5-9 ]

The preparation methods and main characteristics of known catalysts for carbon monoxide oxidation have been examined. A short review in a tabular form which facilitates a quick view on catalysts for CO oxidation (mainly cobalt ones) is represented.

To examine the effect of preparation methods, four catalyst samples having same composition (CuCe_5.17Zr_3.83O_x/g-Al₂O₃ (15wt%) were prepared by four different methods for CO oxidation. The catalysts were prepared by co-impregnation, citric acid sol-gel, urea nitrate combustion and urea gelation co-precipitation methods, and characterized by BET, XRD, TGA/DSC and SEM. The The air oxidation of CO was carried out in a tubular fixed bed reactor under the following operating conditions: catalyst weight - 100 mg, temperature - ambient to 250 ^oC, pressure - atmospheric, 2.5% CO in air, total feed rate - 60 ml/min. It was observed that the catalytic activity greatly influenced by the preparation methods. The highest activity of the catalyst prepared by the sol gel method appeared to be associated with its largest BET surface area. All the four catalysts were active for CO oxidation and did not show deactivation of catalytic activity for 50 hours of continuous runs. The ranking order of the preparation methods of the catalyst is as follows: sol-gel > co-impregnation > urea gelation > urea nitrate combustion. Copyright © 2012 by BCREC UNDIP. All rights reserved

Received: 14th June 2012, Revised: 8th September 2012, Accepted: 19th September 2012

[How to Cite: G. Rattan, R. Prasad, R.C.Katyal. (2012). Effect of Preparation Methods on Al2O3 Supported CuO-CeO2-ZrO2 Catalysts for CO Oxidation. Bulletin of Chemical Reaction Engineering & Catalysis, 7(2): 112-123. doi:10.9767/bcrec.7.2.3646.112-123]

[How to Link / DOI: http://dx.doi.org/10.9767/bcrec.7.2.3646.112-123 ]

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