| 罗明悦,刘璐,马雅婷,郁格格,赵玉宝.铀氧化物基固体酸的制备及其催化乙醇脱水性能的研究[J].南华大学学报(自然科学版),2023,(5):92~96.[LUO Mingyue,LIU Lu,MA Yating,YU Gege,ZHAO Yubao.Preparation of Urania-Based Solid Acids and Their Catalytic Performance for Dehydration of Ethanol[J].Journal of University of South China(Science and Technology),2023,(5):92~96.] |
| 铀氧化物基固体酸的制备及其催化乙醇脱水性能的研究 |
| Preparation of Urania-Based Solid Acids and Their Catalytic Performance for Dehydration of Ethanol |
| 投稿时间：2023-03-03 |
| DOI：10.19431/j.cnki. 1673-0062.2023.05.014 |
| 中文关键词: β-UO3 表面酸性 S2O2－8/α-U3O8 乙醇脱水〖PS23-05罗明悦OSID码.tif Y4*4,Y#〗 |
| 英文关键词:β-UO3 surface acidity S2O2－8/α-U3O8 ethanol dehydration |
| 基金项目:国家自然科学基金资助项目(22272074) |
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| 中文摘要: |
| 铀氧化物由于具有独特的电子结构和多种价态之间可以相互转换的特点,在催化领域可望有广阔的应用前景。本文通过(NH4)2S2O8浸渍重铀酸铵,调变UO3的表面酸性,制备了系列铀氧化物固体酸催化剂,初步评价了它们催化乙醇脱水制乙烯反应的性能。实验结果表明,S2O2－8的引入会促进β-UO3向α-U3O8的转变,适宜的焙烧处理可使其表面酸位密度提高一个数量级。焙烧温度550 ℃,固体酸的表面酸量最大,中强酸位酸量最多,表现出最佳的乙醇脱水制乙烯性能:275 ℃,重时空速为1.63 h－1的反应条件下,乙醇转化率和乙烯收率均达100%。 |
| 英文摘要: |
| Uranium oxide has a promising prospect in the field of catalysis due to its unique electronic structure and the ability to convert between multiple valence states. A series of UxOy-based solid acid catalysts were prepared by modulating the surface acidity of urania with (NH4)2S2O8. Their catalytic performance in the reaction of ethanol dehydration to ethylene was comparatively evaluated. The experimental results showed that the introduction of S2O2－8 prompts the phase transformationfrom β-UO3 to α-U3O8, and the surface acid site density of urania could be significantly increased by one order of magnitude. Urania-based solid acid calcinated at 550 ℃ catalysts holds the largest surface acid amount, and exhibits the best catalytic activity of ethanol dehydration to ethylene:ethylene yield of 100% could be achieved at 275 ℃ with the ethanol weight hourly space velocity of 1.63 h－1. |
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