通过阳极氧化法制备出多孔氧化铝板状催化剂载体, 考察了不同水合条件对多孔氧化铝膜性能的影响, 并通过TG、XRD、SEM和BET等分析手段研究了Al2O3/Al的晶态形成规律. 实验结果表明, 最佳水合温度为80℃, 非晶态氧化铝发生反应生成AlOOH, 经过500℃焙烧可以完全转化为γ-Al2O3. 经过水合后制备的γ-Al2O3/Al板状催化剂载体在高温水蒸气氛围下晶型结构稳定性能好.
The porous alumina as a plate catalytic support was prepared by anodization. Effects of hydration condition on the property of alumina supports were studied. The samples were characterized by XRD, SEM, BET and etc. to illustrate the Al2O3/Al forming mechanism. The results show that the best hydration temperature is 80℃, at which the amorphous alumina can be transformed into AlOOH, and become γ-Al2O3 after 500℃ calcination. Meanwhile, the monoliths catalytic carriers have a superior stability for crystalline structures in the steam atmosphere at high temperature.
参考文献
| [1] | |
| [2] | Nageswara Rao P, Deepak K. Oxidative steam reforming of ethanol over Rh based catalysts in a micro-channel reactor. J. Hydrogen Energy, 2011, 36(5): 3384-3396.[2] Guettel R, Turek T. Assessment of micro-structured fixed-bed reactors for highly exothermic gas-phase reactions. Chem. Eng. Sci., 2010, 65(5): 1644-1654.[3] Hwang S M, Kwon J O, Ahn S H, et al. Silicon-based micro-reactor for preferential CO oxidation. Chem. Eng. J., 2009, 146(1): 105-111.[4] Germani G, Stefanescu A, Schuurman Y, et al. Preparation and characterization of porous alumina-based catalyst coatings in microchannels. Chem. Eng. Sci., 2007, 62(18/19/20): 5084-5091.[5] Lee S J, Gavriilidis A. Au catalysts supported on anodised aluminium for low-temperature CO oxidation. Catal. Commun., 2002, 3(9): 425-428.[6] Cho S H, Walther N D., Nguyen S B T, et al. Anodic aluminium oxide catalytic membranes for asymmetric epoxidation. Chem. Commun., 2005, 41(42): 5331-5333. [7] Zhao H, Jiang Z Q, Bao X H, et al. Study of support pore size dependence of silver particle agglomeration by applying ordered porous anodic alumina. Chin. J. Catal., 2006, 27(5): 381-385.[8] Sanz O, Martinez L M, Echave F J, et al. Aluminium anodisation for Au-CeO2/Al2O3-Al monoliths preparation. Chem. Eng. J., 2009, 151(1/2/3): 324-332.[9] Chen C C, Chen J H, Chao C G. Post-treatment method of producing ordered array of anodic aluminum oxide using general purity commerical (99.7%) aluminum. Appl. Phys., 2005, 44(3): 1529-1533.[10] Burgos N, Paulis M, Montes M. Preparation of Al2O3/Al monoliths by anodisation of aluminium as structured catalytic supports. J. Mater. Chem., 2003, 13(6): 1458-1467.[11] 应卫勇, 龟山秀雄(YING Wei-Yong, et al). 金属壁与催化层一体化内翅片管状催化剂的研究. 催化学报(Chinese. J. Catal.), 1997, 18(6): 459-462.[12] 张立佳, 杨红健, 侯凯湖. 规整填料型加氢脱硫催化剂的制备及性能评价. 化工进展, 2008, 27(7): 1090-1095.[13] 杜长海, 王树江, 杨 骥, 等(DU Chang-Hai, et al). 填料型固体酸的制备及其催化性能. 高等学校化学学报(Chemical J. Chinese Univ.), 2004, 25(10): 1916-1919.[14] 杜长海, 秦永宁, 贺岩峰, 等(DU Chang-Hai, et al). 催化精馏专用填料型固体酸SO42--/ZrO2-Al2O3-Al的研究. 化学物理学报(Chinese J. Chemical Physics), 2003, 16(6): 504-508.[15] Du C H, Qin Y N, He Y F, et al. Preparation and characterization of novel solid acid of sulfated anodized aluminium. J. Mol. Catal., 2003, 17(3): 183-187.[16] 朱祖芳. 铝合金阳极氧化与表面处理技术, 2版. 北京: 化学工业出版社, 2009: 362-363.[17] Vazquez A L, Carrera R, Arce E, et al. Preparation of mesoporous alumina films by anodization: effect of pret- reatments on the aluminum surface and MTBE catalytic oxidation. J. Alloys Compd., 2009, 483(1/2): 418-421.[18] JIN Fang, LI Zuo-Yi, YAN Jun-Bing, at al. effect of anodized aluminum oxide underlayer on the magnetic properties and structure of SmTbCo magnetic films. Journal of Inorganic Materials, 2009, 24(3): 595-598.[19] 张李锋, 石 悠, 赵斌元, 等. &gamma |
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