| 微波辐射下稀土交换ZSM-5分子筛的制备及裂解反应研究 |
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| 引用本文： | 常春,张武阳,张丽华,李荣生,田明文,杨胥微,侯莉. 微波辐射下稀土交换ZSM-5分子筛的制备及裂解反应研究[J]. 高等学校化学学报, 1996, 17(12): 1914 |
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| 作者姓名： | 常春 张武阳 张丽华 李荣生 田明文 杨胥微 侯莉 |
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| 作者单位： | 吉林大学化学系, 长春, 130023 |
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| 基金项目： | 国家稀土化学与物理开放实验室资助 |
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| 摘 要： | 借助微波技术制备出一系列具有不同La3+交换度的LaHZSM-5样品。初步探讨了微波强度、微波作用时间及Si/Al比对交换度的影响。对其表面酸性的考察发现,样品均含有B酸和L酸中心,并且随La3+进入ZSM-5沸石的量的不同,强弱酸中心的强度与数量均有所改变。对样品催化性能的研究结果表明,催化活性与La3+含量及酸量呈顺变关系。
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| 关 键 词： | La3+交换ZSM-5分子筛 微波技术 表面酸性 裂解反应 |
| 收稿时间： | 1995-11-29 |
Studies on Preparation of LaHZSM-5 by Microwave Technique and Its Cracking Properties |
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| CHANG Chun,ZHANG Wu-Yang,ZHANG Li-Hua,LI Rong-Sheng TIAN Ming-Wen,YANG Xu-Wei,HOU Li. Studies on Preparation of LaHZSM-5 by Microwave Technique and Its Cracking Properties[J]. Chemical Research In Chinese Universities, 1996, 17(12): 1914 |
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| Authors: | CHANG Chun ZHANG Wu-Yang ZHANG Li-Hua LI Rong-Sheng TIAN Ming-Wen YANG Xu-Wei HOU Li |
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| Affiliation: | Department of Chemistry, Jilin University, Changchun, 130023 |
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| Abstract: | Aseries of LaHZSM-5 samples with different La3+ exchange degrees were prePared by microwave technique. The effects of microwave power,exchang time and Si/Al ratio on La3+)exchange degree have been investigated.found that Bronsted and Lewis acid sites are present on the surfaces of samples. The strength and amount of the strong and weak acid sites are changed with different amount of La3+ added into ZSM-5 zeolites,The studies on catalytic properties show that the cracking activity is correlation to the amount of La3+ in samples. |
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| Keywords: | La3+-exchanged ZSM-5 zeolite Microwave technique Surface acidity Cracking reaction |
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