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DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳發林 | |
dc.contributor.author | Chih-Yi Kuo | en |
dc.contributor.author | 郭至益 | zh_TW |
dc.date.accessioned | 2021-06-13T15:21:28Z | - |
dc.date.available | 2008-07-30 | |
dc.date.copyright | 2008-07-30 | |
dc.date.issued | 2008 | |
dc.date.submitted | 2008-07-21 | |
dc.identifier.citation | [1] M. S. Lim, M. R. Kim, J. Noh, S. I. Woo, “ A plate-type reactor coated with
zirconia-sol and catalyst mixture for methanol steam-reforming, ”J. Power Sources Vol. 140, (2005) pp.66-71. [2] G. G. Park, S. D. Yim, Y. G. Y, C. S. Kim, D. J. Seo, K. Eguchi, “ Hydrogen production with integrated microchannel fuel processor using methanol for portable fuel cell systems, ”Catal. Today, Vol. 110,(2005) pp.108-113. [3] K. Yoshida, S. Tanaka, H. Hiraki, M. Esashi, “ A micro fuel reformer integrated with combustor and a microchannel evaporator, ”J. Micromech. Microeng, Vol.16, (2006) pp.191-197. [4] L. Pan, S. Wang, “ Modeling of a compact plate-fin reformer for methanol steam reforming in fuel cell systems, ”Chem. Eng. J., Vol.108 (2005) pp.51-58. [5] G. G. Park, D. J. Seo, S. H. Park, Y. G. Yoon, C. S. Kim, W. L. Yoon, “ Development of microchannel methanol steam reformer, ”Chem. Eng. J., Vol.101(2004)pp.87-92. [6] O. J. Kwon, S. M. Hwang, J. G. Ahn, J. J. Kim, “ Silicon-based miniaturized-reformer for portable fuel cell application, ”J. Power Sources Vol.156,(2006) pp.253-259. [7] J. D. Holladay, E. O. Jones, M. Phelps, J. Hu, “ Microfuel processor for use in a miniature power supply, ”J. Power Sources., Vol.108(2002) pp.21-27 [8] J. D. Holladay, E. O. Jones, R. A. Dagle, G. G. Xia, C. Cao, Y. Wang, “ High efficiency and low carbon monoxide micro-scale methanol processors, ” J. Power Sources., Vol.131(2004) pp.69-72. [9] D. E. Park, T. G. Kim, S. J. Kwon, C. K. Kim, E. S. Yoon, “ Micromachined methanol steam reforming system as a hydrogen supplier for portable proton exchange membrane fuel cell, ”Sensors and Actuators A, Vol.135(2007) pp.58-66. [10] M. Zanfir, A. Gavriilidis, “ Catalytic combustion methane steam reforming in a catalytic plate reactor, ”Chem. Eng. Sci., Vol.58 (2003) pp.3947-3960. [11] A. Karim, J. Bravo, D. Gorm, T. Conant, A. Datye, “ Comparison of wall-coated and packed-bed reactors for steam reforming of methanol, ”Catal. Today, Vol.110 (2005) pp.86-91. [12] A. Karim, J. Bravo, A. Datye, “ Nonisothermality in packed bed reactors for steam reforming of methanol, ”Appl. Catal., A, Vol.282 (2005) pp.101-109. [13] M. J. Stutz, D. Poulikakos, “ Effect of microreactor wall heat conduction on the reforming process of methane, ”Chem. Eng. Sci., Vol.60 (2005) pp.6983-6997. [14] M. J. Stutz, N. Hotz, D. Poulikakos, “ Optimization of methane reforming in a microreactor-effects of catalyst loading and geometry, ” Chem. Eng. Sci., Vol.61 (2006) pp.4027-4040. [15] S. Nagano, H. Miyagawa, O. Azegami, K. Ohsawa, “ Heat transfer enhancement in methanol steam reforming for a fuel cell, ” Ener. Conv. Manag., Vol. 23, (2005) pp. 183-188. [16] H. G. Park, W. T. Piggott, J. Chung, J. D. Morse, M. Havstad, C. P. Grigoropoulos, R. Greif, W. Benett, D.Sopchak, R. Upadhye, “A methanol steam reforming micro reactor for proton exchange membrane micro fuel cell system,” Proceeding of the Hydrogen and Fuel Cells 2003 Conference and Trade Show, Vancouver, Canada, June 12-14(2003). [17] H. Purnama, T. Ressler, R. E. Jentoft, H. Soerijanto, R. Schlogl, R. Schomacker, “ CO formation/selectivity for steam reforming of methanol with a commercial CuO/ZnO/Al2O3 catalyst,” Appl. Catal., A, Vol.259 (2004) pp.83-94. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/37209 | - |
dc.description.abstract | 本論文使用商業套裝軟體FLUENT模擬三維數值模型,考慮流場、質傳與化學反應針對平板式微型甲醇重組器進行性能分析。討論在溫度、水和甲醇入口莫耳分率比和流道高度之情況下,重組器的甲醇轉化率、氫氣產生率以及各項物種在出口之莫耳分率的變化。模擬的過程中,溫度控制在220-300OC,觸媒層中化學反應為甲醇蒸氣重組(SR)反應以及水氣轉移(rWGS)反應。模擬結果顯示,重組器的甲醇轉化率與氫氣產生率隨著溫度上升而增加。在固定入口燃料流量下,流道高度的改變對於甲醇轉化率並沒有明顯的變化,反而在改變入口燃料速度上,流道高度越低,甲醇轉化率與氫氣產生率越高,此時觸媒體積與流道體積佔了重要的因素,因為流道高度越高,流道體積越大,在相同的入口燃料速度下,但是觸媒與流道體積的比卻變小。此外,水與甲醇入口莫耳分率比對於甲醇轉化率和物種出口之莫
耳分率影響十分有限,然而增加水與甲醇入口莫耳比率代表減少入口燃料中甲醇的比例,對於氫氣產生率來說,反而是呈現下降的狀態。 | zh_TW |
dc.description.abstract | In this study, a three-dimensional physical model design for a planar type of micro methanol reformer has been investigated numerically. The physical model including the flow, mass transport and chemical reaction simulated by commercial software FLUENT. This study discuss the temperature, the steam to carbon ration and the height of micro-channel to observe the methanol conversion, the generation rate of hydrogen and the mole fraction of species at outlet. The temperature range is 220-300OC. The chemical reaction are the methanol steam-reforming(SR)reaction and the reverse water gas-shift(rWGS)reaction. The results show that the methanol conversion and the generation rate of hydrogen increase as the reaction temperature increase from 220 to 300OC. The height of channel show little effect on methanol conversion at a fixed feed rate of liquid feed. However, the variation of the velocity of liquid, the height of channel increases with increasing methanol conversion and the generation of hydrogen. At the same time, the volume of catalyst and channel play an important pole. In the same velocity of liquid, the volume of catalyst and channel ratio reduced, whereas the
vii height of channel is higher. Besides, the steam to carbon ratio demonstrates slight influence on methanol conversion and the mole fraction of species at outlet. Increasing the steam to carbon ratio represents the ratio of methanol in fuel decreases; the generation of hydrogen also diminishes. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T15:21:28Z (GMT). No. of bitstreams: 1 ntu-97-R95543069-1.pdf: 842162 bytes, checksum: b319a9541646379f0cbee0a16a6aec97 (MD5) Previous issue date: 2008 | en |
dc.description.tableofcontents | 目次
中文摘要………………………………………………………iii 英文摘要………………………………………………………v 表目錄………………………………………………………vii 圖目錄………………………………………………………viii 符號說明………………………………………………………xii 一、 緒論………………………………………………………1 1.1燃料電池重組器簡介…………………………………………………1 1.2重組器工作原理………………………………………………………2 1.3文獻回顧………………………………………………………4 1.4研究動機………………………………………………………10 二、 理論分析………………………………………………………11 2.1基本假設………………………………………………………11 2.2統御方程式………………………………………………………11 2.3邊界條件………………………………………………………14 三、 數值方法………………………………………………………17 3.1軟體簡介………………………………………………………17 3.2有限體積法………………………………………………………17 3.3有限差分法………………………………………………………19 3.4收斂標準與格點測試………………………………………………20 四、 結果與討論………………………………………………………22 4.1溫度效應………………………………………………………22 4.2水與甲醇入口比率效應……………………………………………33 4.3流道高度效應………………………………………………………41 五、 結論與建議………………………………………………………58 5.1結論………………………………………………………58 5.2建議………………………………………………………59 參考文獻………………………………………………………………60 表 目 錄 表2-1流道尺寸表……………………16 表4-1基本操作條件之參數表……………57 圖 目 錄 圖2-1平板式甲醇重組器示意圖…………………………15 圖2-2平板式甲醇重組器上視示意圖……………15 圖3-1不同格點數對流道內甲醇莫耳分率分怖之關係圖;操作條件在溫度260OC,水與甲醇入口莫耳分率為1.5……………21 圖4-1FLUENT模擬與實驗Lim et al.[1]比較在S/C=1.0和S/C=1.5,甲醇轉化率與溫度變化之關係圖…………24 圖4-2FLUENT模擬與實驗Lim et al.[1]比較在S/C=1.0和S/C=1.5,氫氣產生率與溫度變化之關係圖…………25 圖4-3在固定S/C=1.5下,甲醇轉化率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖…26 圖4-4在固定S/C=1.5下,氫氣產生率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖…27 圖4-5在固定S/C=1.5下,甲醇出口莫耳分率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖.28 圖4-6在固定S/C=1.5下,水出口莫耳分率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖...29 圖4-7在固定S/C=1.5下,二氧化碳出口莫耳分率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖……………………30 圖4-8在固定S/C=1.5下,一氧化碳出口莫耳分率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖……………………31 圖4-9在固定S/C=1.5下,氫氣出口莫耳分率與入口燃料流量對(1)220OC、(2)260OC、(3)300OC之曲線圖.32 圖4-10在固定溫度為260 OC下,甲醇轉化率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…34 圖4-11在固定溫度為260 OC下,氫氣產生率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…35 圖4-12在固定溫度為260 OC下,甲醇出口莫耳分率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…36 圖4-13在固定溫度為260 OC下,水出口莫耳分率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…37 圖4-14在固定溫度為260 OC下,二氧化碳出口莫耳分率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…………38 圖4-15在固定溫度為260 OC下,一氧化碳出口莫耳分率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…………39 圖4-16在固定溫度為260 OC下,氫氣出口莫耳分率與入口燃料流量對(1)S/C=1.0、(2)S/C=1.5、(3)S/C=2.0…40 圖4-17在固定溫度為260 OC與S/C=1.5下,甲醇轉化率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖…………43 圖4-18在固定溫度為260 OC與S/C=1.5下,氫氣產生率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖………44 圖4-19在固定溫度為260 OC與S/C=1.5下,甲醇出口莫耳分率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖……45 圖4-20在固定溫度為260 OC與S/C=1.5下,水出口莫耳分率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖………46 圖4-21在固定溫度為260 OC與S/C=1.5下,二氧化碳出口莫耳分率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖47 圖4-22在固定溫度為260 OC與S/C=1.5下,一氧化碳出口莫耳分率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖48 圖4-23在固定溫度為260 OC與S/C=1.5下,氫氣出口莫耳分率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖…49 圖4-24在固定溫度為260 OC與S/C=1.5下,甲醇轉化率與入口燃料速度對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖…………50 圖4-25在固定溫度為260 OC與S/C=1.5下,氫氣產生率與入口燃料流量對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖…………51 圖4-26在固定溫度為260 OC與S/C=1.5下,甲醇出口莫耳分率與入口燃料速度對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖……52 圖4-27 在固定溫度為260 OC與S/C=1.5下,水出口莫耳分率與入口燃料速度對(1)H=0.25、(2)H=0.5、(3)H=0.75之曲線圖……………53 | |
dc.language.iso | zh-TW | |
dc.title | 平板式微型甲醇重組器之性能分析 | zh_TW |
dc.title | Numerical Simulation for a planar type of micro methanol reformer | en |
dc.type | Thesis | |
dc.date.schoolyear | 96-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 張敏興,顏維謀,宋齊有,羅安成 | |
dc.subject.keyword | 微型重組器,甲醇蒸氣重組,數值模擬, | zh_TW |
dc.subject.keyword | Micro-reformer,Methanol steam-reforming,Numerically, | en |
dc.relation.page | 61 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2008-07-23 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 應用力學研究所 | zh_TW |
顯示於系所單位: | 應用力學研究所 |
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