碳酸鹽對生質料氣化之影響和合成氣催化重整後應用於固態燃料電池上之研究

Effect of Carbonate and Ni-CeO2/Al2O3 on Biomass Gasification and Syngas Reforming for SOFC

張源開(Un-Hoi Cheong)

指導教授 ： 韋文諴

國立臺灣大學/工學院/材料科學與工程學研究所/碩士(2014年)

https://doi.org/10.6342/NTU.2014.02301

摘要

生質材料在台灣屬最有前途的可再生能源之一。然而生質料經過氣化後，氣體裡會含有一些雜質如焦油，會使催化劑或陽極因積碳或毒化而影響其效能。在本論文裡將會研究三種台灣較易容取得之生質料，包括：棕櫚纖維(PF)，柳杉(CW)，廢木屑(WS) ， 都市固體廢棄物(MSW)。通過添加碳酸鹽催化劑與否和使用Ni-CeO2/γ-Al2O3 重整燃氣的研究，提高了合成氣中氫氣的比例，而焦油也得到了減少。最後經過自組裝的SOFC進行測試，在800oC測到的OCV值為1.00伏　(開路電壓)，輸出功率為62 mWcm-2，比使用純氫氣作為燃料時的1.10伏和 62 mWcm-2稍低。

關鍵字

生質材料 ； 氣化 ； 催化劑 ； 分解 ； 重整

並列摘要

Biomass is one of the promising renewable energy sources in Taiwan. However, after gasification, there release gaseous fuel and some impurities, such as tar, which make catalyst or anode coking and poisoning, and degrade the performance of fuel cells. Three biomasses, including palm fiber (CSPF), cryptomeria waste (CW), waste sawdust (WS) and one municipal solid waste (MSW) have been tested. Gasification with and without carbonate catalysts, and the reforming of fuel gas by using Ni-CeO2/γ-Al2O3 catalyst were investigated. The improvement on the H2 content in the syngas and the reduction of tar were noted and optimized. The syngas was tested as a fuel for self-assembled SOFC. The output of the SOFC were 1.00 V (open-circuit voltage) and a maximum power density of 62 mWcm-2 at 800oC, which were inferior to 1.10 V and 140 mWcm-2 of using pure H2 as the fuel.

並列關鍵字

biomass ； gasification ； catalyst ； decomposition ； reformation

參考文獻

[1] S. Zha, Z. Cheng, M. Liu, "Sulfur Poisoning and Regeneration of Ni-Based Anodes in SOFCs," J. Electrochem Soc., 154 (2007), pp. B201-B206.

[2] Z.A. El-Rub, E.A. Bramer, G.Brem, "Review of Catalysts for Tar Elimination in Biomass Gasification," Ind. Eng. Chem. Res., 43 (2004), pp. 6911-6919.

[3] S.V. Vassilev, D. Baxter, L. K. Andersen, C. G. Vassileva, "An Overview of the Chemical Composition of Biomass," Fuel, 89 (2010), pp. 913-933

[4] EPA, Statistics of Waste of 2010, Environmental Protection Administration, Taiwan (2010)

[6] M. He, B. Xiao, Z. Hu, S. Liu, X. Guo, S. Luo, "Syngas Production from Catalytic Gasification of Waste Polyethylene: Influence of Temperature on Gas Yield and Composition," Int. J. Hydrogen Energ, 3 (2009), pp. 1342-1348.