於陶瓷纖維紙上合成ZSM-5與Au/CeO2觸媒及反應性測試

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/3938

Title:	於陶瓷纖維紙上合成ZSM-5與Au/CeO2觸媒及反應性測試
Authors:	藍友聰;You-Tsung Lan
Contributors:	化學工程與材料工程研究所
Keywords:	陶瓷纖維紙;沸石;氧化鈰;金觸媒;au;ceramic fiber paper;ceo2;ZSM-5
Date:	2006-06-26
Issue Date:	2009-09-21 12:26:29 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	在陶瓷纖維紙上合成ZSM-5 沸石的研究中，採用直接水熱法、水蒸氣輔助水熱法，以及陶瓷纖維紙表面改質，可將ZSM-5 沸石順利附著於纖維紙上。當中經表面改質後，增加了纖維表面的粗糙度，提供較多的成核位置，接著再以水蒸氣輔助水熱法的效果最佳，合成溫度170-190℃，合成時間只需10 小時，由XRD 和SEM 鑑定後，證實ZSM-5 有良好的結晶強度和完全覆蓋纖維表面。最後經酸性活性測試，所表現出的活性也有優良表現。在陶瓷纖維紙上合成Au/CeO2 的研究中，CeO2 母液是以sol-gel 方法合成，再採用乾膠法合成於陶瓷纖維紙上，研究母液的靜置時間、酸強度、母液水浴溫度、纖維浸泡時間、浸泡次數及煅燒溫度等因素的影響。利用sol-gel 方法合成CeO2 母液，穩定性良好。靜置5 天後，即可保存、使用一段相當長的時間。若將前趨物加以水浴，可縮短靜置熟成的時間。此外進行乾膠法合成時，在短短數分鐘內，便可將纖維表面完整覆蓋。且覆蓋於纖維上的CeO2 顆粒，其大小為奈米級，附著性佳。於母液中添加的酸強度增加時，會縮短CeO2 前趨物轉變 CeO2 的時間。但酸強度過高，會破壞纖維機械強度，而使纖維破碎。另外，在進行金擔載於CeO2 時，經由EDX 分折及外觀明顯變色(黃 ->紫)，可證明成功擔載金於載體(CeO2/陶瓷纖維上)。 Two main topic are studied in this research. One is the synthesis of ZSM-5 on ceramic fiber paper. The other is the synthesis of the catalysis of Au/CeO2 on ceramic fiber paper. In the synthesis of ZSM-5 on ceramic fiber paper, hydrothermal method was applied. By XRD pattern, it proves that the ZSM-5 crystal coated on the surface. However, SEM photographs show that ceramic fibers are not completely covered with ZSM-5. Ceramic fiber paper after acid treatment provides more nucleation sites. The ceramic fibers are completely covered by an uniform layer of well shaped ZSM-5 crystals after 10 hours heating at 170~190℃. Finally, the cumene cracking reaction test manifests that ZSM-5 on ceramic fiber paper show good activity. Synthesis of the catalytic Au/CeO2 on ceramic fiber paper is the goal of second part study. Sol-gel method was used to synthesize CeO2 on ceramic fiber paper. The ceramic fiber paper was soaked in the precursor solution for several minutes and several times. There are six factors investigated for the synthesis : the time and the temperature of precursor aged, the acid concentration of precursor, the time for soaking fiber paper in the precursor, the times for coated fibers and the temperature of calcinations. The precursor solution is stable for 2-3 months. By SEM photographs and XRD patterns show that the CeO2 cover the ceramic fiber completely and the particle size of CeO2 is 10-20 nano meter. Finally, we use the deposition-precipitation method to load Au on the CeO2/fiber paper. The color change of CeO2 coated paper and EDX analysis, it show successful for loading Au on CeO2/fiber paper.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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