Pd-Cu/AC and Pt-Cu/AC catalysts for nitrate reduction with hydrogen Influence of calcination and reduction temperatures

• Type: Article in International Scientific Journal
• Date: 2010

Authors

O. S. G. P. Soares (Author) FEUP; J. J. M. Órfão (Author) FEUP; J. Ruiz-Martínez (Author) Other; J. Silvestre-Albero (Author) Other; A. Sepúlveda-Escribano (Author) Other; M. F. R. Pereira (Author) FEUP

Journal

Title: Chemical Engineering Journal

Vol. 165

Pages: 78-88

ISSN: 1385-8947

Publisher: Elsevier

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ISI Web of Knowledge - 64 Citations

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Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-003-0ZK

DOI: 10.1016/j.cej.2010.08.065

Abstract (EN): The influence of calcination and reduction temperatures on the catalytic properties of Pd-Cu and Pt-Cu bimetallic catalysts supported on activated carbon for the reduction of nitrates was studied The catalysts were prepared using different calcination and reduction temperatures and the respective activities and selectivities for the reduction of nitrates in water with hydrogen were assessed It was found that the different preparation conditions lead to different catalytic performances For both catalysts the activity decreases by increasing calcination and reduction temperatures whereas the effect on the selectivity is not uniform For the 1%Pd-0 3%Cu (wt %) catalyst the nitrate conversion after 5 h of reaction varies from 93% (sample calcined at 200 C and not reduced) to 25% (sample calcined and reduced at 400 C) The formation of alloys during the preparation of the catalysts is prejudicial for nitrate reduction In all the preparation conditions tested the Pd-Cu pair is more selective for the transformation of nitrate into nitrogen All the samples have been characterized by nitrogen adsorption at -196 C CO adsorption microcalorimetry TPR XRD XPS and TEM

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11