| 研究生: |
黃振瑋 Huang-Zhen Wei |
|---|---|
| 論文名稱: |
CuO/Ce1-xSnxO2觸媒於富氫中CO的選擇性氧化反應研究 |
| 指導教授: |
廖炳傑
Biing-jye Liaw 陳吟足 Yin-Zu Chen |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程與材料工程學系 Department of Chemical & Materials Engineering |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 95 |
| 中文關鍵詞: | 富氫中CO的選擇性氧化反應 |
| 外文關鍵詞: | Ce1-xSnxO2, CuO |
| 相關次數: | 點閱:11 下載:0 |
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本研究以具有釋氧/儲氧redox特性的Ce1-xSnxO2氧化物為擔體,利用含浸法製備CuO/Ce1-xSnxO2觸媒,探討觸媒於富氫中CO選擇性氧化反應特性。 XRD、TPR證實,適量的SnO2(x=0.1~0.2)可固溶入CeO2,造成CeO2結構扭曲、鬆動,增強Ce1-xSnxO2的redox特性,x≥0.3時部分的SnO2則無法完全固溶入CeO2而有分離相形成。脈衝式CO吸附實驗與XPS證實,於CeO2中引入SnO2可促進觸媒產生更多的活性中心Cu+。少量SnO2的引入,確實有助CuO/Ce1-xSnxO2觸媒於CO選擇性氧化反應之活性,擔體中以Ce0.9Sn0.1O2有最佳表現,7%CuO/Ce1-xSnxO2觸媒於轉化率達100%所需溫度(T100)比7%CuO/CeO2之T100降低15℃。CuO負載量為3%即接近最佳活性,脈衝式CO吸附證實,7%CuO/Ce1-xSnxO2觸媒有最大CO吸附量,有最多活性中心Cu+,有最佳活性。選擇性方面,7%CuO/Ce1-xSnxO2小於100℃前,都可維持100%的選擇率,是一個具有極高選擇率的觸媒。CO2及H2O雖會降低7% CuO/Ce0.9Sn0.1O2觸媒活性,但觸媒仍能維持高選擇性,且有不錯的穩定性,經過200小時反應後,觸媒仍能保持接近初始的轉化率與選擇率。7%CuO/Ce0.9Sn0.1O2活性雖然不及3%Au/CeO2,但有較佳選擇率。7%CuO/Ce0.9Sn0.1O2觸媒與5%Pt/Al2O3觸媒之活性相當,但選擇率則遠優於5%Pt/Al2O3觸媒,具有取代5%Pt/Al2O3的潛力。
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