Effect of Preparation Method and Water Vapor on Cu/Ce Catalyst for CO Oxidation
碩士 === 國立臺灣科技大學 === 化學工程系 === 89 === Abstract The major purpose of this study is to investigate the effects of different preparation method and water vapor on Cu/Ce catalyst for Carbon monoxide oxidation. γ-Al2O3 was used as support and 5 % of copper loading was chosen as a bas...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2001
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| Online Access: | http://ndltd.ncl.edu.tw/handle/95767189135299907436 |
| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 89 === Abstract
The major purpose of this study is to investigate the effects of different preparation method and water vapor on Cu/Ce catalyst for Carbon monoxide oxidation. γ-Al2O3 was used as support and 5 % of copper loading was chosen as a base for the catalysts. The additives were 20 % of CeO2.
All the prepared catalysts were characterized by Nitrogen physical adsorption (BET)、X-ray diffraction (XRD)、Temperature- program reduction (TPR)、N2O titration 、Scanning electron microscopic (SEM) and Energy disperse spectrum (EDS).
From BET analysis , it was found that total surface area was decreased and average pore diameter was increased with calcination temperature for all the catalysts. XRD pattern shows that no detectable copper peak appears for all the catalysts except IE series.
TPR profiles reveals that all catalysts with cerium oxide addition except IE series present an α-peak which corresponds to the copper oxide interacting with cerium oxide. N2O titration indicates that cerium oxide addition can promote copper dispersion and increase copper surface area.
EDS analysis find that higher find that the EI catalyst calcined at 650℃ for 3 hrs provides the best activity.
The experiments also find that all the catalyst will be deactivated by water vapor. The degree of deactivation of activity depends not only on preparation method but also on calcinations temperature . Among the catalysts , the EI catalysts calcined at 700℃ presents the lowest degree of deactivation.
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