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Investigation on gold dispersion of Au/ZrO2 catalysts and activity in the low-temperature WGS reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
47864 46483 2009 6 PDF Available
Title
Investigation on gold dispersion of Au/ZrO2 catalysts and activity in the low-temperature WGS reaction
Abstract

Gold over zirconia and sulfated zirconia catalysts were tested in the water–gas shift (WGS) reaction at temperatures between 423 and 453 K. Samples were characterized by N2 adsorption analysis, XRD, TPO, TG-DTA and pulse-flow CO chemisorption. A very good linear relationship between catalytic activity and dispersion determinated by chemisorption has been evidenced. Sulfated catalysts showed higher activities than samples over plain zirconia. SO4= do not behave as promoters of the gold active phase, but they yield a larger specific surface area of the zirconia, thus favouring a better dispersion of gold nanoparticles on the support. CO amount at the reactor outlet has been checked and will be discussed.

Keywords
Chemisorption; Dispersion; Gold; Sulfated zirconia; Zirconia; WGS reaction
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Investigation on gold dispersion of Au/ZrO2 catalysts and activity in the low-temperature WGS reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 89, Issues 1–2, 3 July 2009, Pages 303–308
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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