Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/98461
標題: 鈰促進鎳觸媒與氧氣增益對甲烷乾重組效能之探討
Effects of Ce-promoted Nickel Catalysts and O2-enhanced on Dry Reforming of Methane
作者: 方文佑
Wen-You Fung
關鍵字: 合成氣;甲烷乾重組;積碳;氧化鈰改性觸媒;氧氣添加;dry Syngas;Dry reforming of methane (DRM);Carbon deposition;CeO2-modified catalyst;O2 addition
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摘要: 
本研究以Ni金屬為基礎觸媒實驗研究通過甲烷乾重組形成合成氣,為了抑制炭沉積以及提高觸媒活性,在研究中添加CeO2和反應氣體中氧氣添加改變Ni/Al2O3觸媒效能。由於觸媒中添加CeO2會形成CeAlO3元素藉此提高了抗積碳性能,因此可有效提高觸媒性能,但是CeO2含量增加時,比表面積會跟著減少,因此適量的CeO2可獲得最佳的DRM性能。
在反應氣體中添加O2,發現通過添加O2可提升CH4轉化率,然而CH4與O2進行氧化反應產生CO2,導致CO2轉化率降低,且發現在反應溫度較低溫下CH4部分氧化選擇性較高,導致H2以及CO產率較高。TGA結果顯示,與未改性Ni/Al2O3觸媒相比,當反應氣體中引入O2時,CeO2改性的Ni/Al2O3觸媒具有最低的碳沉積量。

In this study, syngas production via dry reforming of methane (DRM) with CO2 was experimentally investigated using Ni-based catalysts. In order to suppress the carbon deposition for enhancing the catalyst activity, Ni/Al2O3 modified with CeO2 addition and O2 addition in the reactant were employed in this study. Due to the formation of CeAlO3 that enhancing the carbon-resistance ability, it was found that DRM performance can be enhanced by using CeO2 modified Ni/Al2O3 catalyst. Due to decrease in specific surface area as CeO2 amount increased, there appeared an optimum CeO2 loading for obtaining the best DRM performance. With O2 addition in the fed reactant, it was found that CH4 conversion can be enhanced by O2 addition. However, decrease in CO2 conversion due to CO2 formation from methane oxidation was resulted. It was also found that exothermic partial oxidation of methane was dominant when reaction temperature was low. This led to the results of higher yields of H2 and CO. The TGA test results showed that the CeO2 modified Ni/Al2O3 catalyst would have the lowest amount of carbon deposition when O2 was introduced in the reaction as compared with unmodified Ni/Al2O3 catalyst.
URI: http://hdl.handle.net/11455/98461
Rights: 同意授權瀏覽/列印電子全文服務,2021-08-27起公開。
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