Internal Methanol Reforming over Samaria-doped Ceria Electrode in Solid Oxide Fuel Cell

固態氧化物燃料電池之氧化釤摻入氧化鈰電極之內部甲醇重組

曾林國(Lin-Kuo Tseng) ； 黃大仁(Ta-Jen Huang)

《Journal of the Chinese Institute of Chemical Engineers》 31卷5期 (2000/09) Pp. 493-498

https://doi.org/10.6967/JCICE.200009.0493

摘要

以鈰系列金屬氧化物作為固態氧化物燃料電池之電極－觸媒材料，在開路及閉路狀態下，進行甲醇重組之研究。以不同添加量的氧化釤摻入氧化鈰(SDC)，如(CeO2)1-x(SmO1.5)x，作為電極－觸媒材料來探討其應用性。在溫度範圍為750~900℃和水蒸氣／甲醇的莫耳比為2的條件下進行重組實驗。結果發現，甲醇重組的選擇率與導氧離子性有關；而Ni-SDC比Ni-YSZ具有更高的開路電位。同時，在SDC系統中，(CeO2)0.9(SmO1.5)0.1因導電度的大幅增進而有最高的去極化能力，以及對甲醇重組具有最高的選擇率。

並列摘要

Methanol reforming was studied over a ceria-based electrode-catalyst in a solid oxide fuel cell under open-and close- circuit conditions. Different additive contents of Samaria-doped ceria (SDC), i.e., (CeO2)1-x(SmO1.5)x, were investigated to determine its possible application as an electrode-catalyst. Experiments were performed over a temperature range of 750~900℃ and under a steam/methanol molar ration of 2. It may be concluded that the selectivity for methanol reforming is associated with the oxygen ionic conductivity. It was found that the Ni-SDC cermet exhibited a higher open-circuit potential than did that of Ni-YSZ (Yttria-stabilized zirconia). Furthermore, (CeO2)0.9(SmO1.5)0.1 showed the highest depolarization ability in the SDC system because of the enhancement of electrical conductivity and also had the highest selectivity for methanol reforming.

並列關鍵字

Methanol ； Reforming ； Samaria-doped Ceria ； Solid Oxide Fuel Cell