Characterization and Catalytic Performance in n-Hexane Cracking of HEU-1 Zeolites Dealuminated Using Hydrochloric Acid and Hydrothermal Treatments
文献类型：期刊论文
| 作者 | Liu Xiaoling1; Wang Yan1; Wang Xujin1; Zhang Yafei1; Gong Yanjun1; Xu Qinghu2; Xu Jun3; Deng Feng3; Dou Tao1 |
| 刊名 | CHINESE JOURNAL OF CATALYSIS
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 33期号:12页码:1889-1900 |
| 关键词 | HEU-1 zeolite dealumination hydrothermal treatment hydrochloric acid treatment catalytic cracking propylene |
| 英文摘要 | A series of modified HEU-1 zeolites were prepared using hydrochloric acid treatment, hydrothermal treatment, and a combination of these. The parent and modified HEU-1 zeolites were characterized by X-ray diffraction, N-2 adsorption-desorption isotherms, X-ray fluorescence, temperature-programmed desorption of ammonia, Fourier-transform infrared spectroscopy of adsorbed pyridine, and Al-27 solid-state magic-angle spinning nuclear magnetic resonance techniques. The catalytic cracking performances of the modified HEU-1 zeolites were evaluated on a fixed-bed microreactor at 625 degrees C, atmospheric pressure, and an n-hexane weight hourly space velocity of 2.0 h(-1). The results showed that extra-framework alumina could be removed by directly treating with hydrochloric acid, and framework alumina could be removed by hydrothermal treatment. Acidity characterization showed that the weak acid sites of HEU-1 zeolites could be adjusted using acid treatment, and the number of strong acid sites could be reduced using hydrothermal treatment. The framework n(Si):n(Al) ratio was improved by using a combination of hydrothermal treatment and acid leaching. The acidities of the HEU-1 zeolites were adjusted and both the mesopore volume and external surface area were enhanced. In n-hexane cracking reactions, the dealuminated HEU-1 zeolite obtained by hydrothermal treatment for 4 h at 600 degrees C and then washing with hydrochloric acid exhibited the highest propylene production as a result of suppression of the hydrogen transfer reaction. At 625 degrees C, the selectivity for propylene on HEU-1(HT4-HCl) increased to 35.2% from 21.9%, and the lifetime of HEU-1(HT4-HCl) was also prolonged from not more than 10 to 40 h. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical |
| 研究领域[WOS] | Chemistry ; Engineering |
| 关键词[WOS] | HZSM-5 ZEOLITES ; LIGHT OLEFINS ; ACTIVE-SITES ; ZSM-5 ; TOPOLOGY ; H-ZSM-5 ; REALUMINATION ; TEMPERATURE ; MECHANISMS ; CONVERSION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313139200004 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1584]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | 1.China Univ Petr, CNPC Key Lab Catalysis, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China 2.China Natl Offshore Oil Corp New Energy Investmen, Beijing 100016, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu Xiaoling,Wang Yan,Wang Xujin,et al. Characterization and Catalytic Performance in n-Hexane Cracking of HEU-1 Zeolites Dealuminated Using Hydrochloric Acid and Hydrothermal Treatments[J]. CHINESE JOURNAL OF CATALYSIS,2012,33(12):1889-1900. |
| APA | Liu Xiaoling.,Wang Yan.,Wang Xujin.,Zhang Yafei.,Gong Yanjun.,...&Dou Tao.(2012).Characterization and Catalytic Performance in n-Hexane Cracking of HEU-1 Zeolites Dealuminated Using Hydrochloric Acid and Hydrothermal Treatments.CHINESE JOURNAL OF CATALYSIS,33(12),1889-1900. |
| MLA | Liu Xiaoling,et al."Characterization and Catalytic Performance in n-Hexane Cracking of HEU-1 Zeolites Dealuminated Using Hydrochloric Acid and Hydrothermal Treatments".CHINESE JOURNAL OF CATALYSIS 33.12(2012):1889-1900. |
入库方式： OAI收割
来源：武汉物理与数学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。