[1]陈宜俍,史晓红,郭士岭,等.离子交换对L沸石的钾含量及酸性质的影响[J].郑州大学学报(工学版),2007,28(4):24-27.[doi:10.3969/j.issn.1671-6833.2007.04.007]
　CHEN Yiliang,SHI Xiaohong,Guo Shiling,et al.Effect of ion exchange on potassium content and acid properties of L zeolite[J].Journal of Zhengzhou University (Engineering Science),2007,28(4):24-27.[doi:10.3969/j.issn.1671-6833.2007.04.007]
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离子交换对L沸石的钾含量及酸性质的影响()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
28
期数:
2007年4期
页码:
24-27
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Effect of ion exchange on potassium content and acid properties of L zeolite
作者:
陈宜俍,史晓红,郭士岭,等.
郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001
Author(s):
CHEN Yiliang; SHI Xiaohong; Guo Shiling; etc
关键词:
L沸石;  离子交换;  氧化钾含量;  酸性;  酸量;  酸强度
Keywords:
L zeolite;  ion exchange;  potassium oxide content;  acidic;  Acid content;  Acid strength
DOI:
10.3969/j.issn.1671-6833.2007.04.007
文献标志码:
A
摘要:
为优化L沸石在石油催化裂化中的应用,以不同的离子换方式对L沸石进行改性.并考察了不同的离子交换方式对降低L沸石钾含量的影响,以及改性后L沸石酸性质的变化.结果表明,离子交换和水蒸汽处理相结合对降低L沸石的钾含量更为有效,经过三次离子交换和三次水蒸汽处理的L沸石样品氧化钾含量可降至0.82%.NH3–TPD程序升温脱附实验结果表明改性后的L沸石表面酸中心的强度提高,酸强度分布变宽,总酸量下降.从红外吡啶吸附谱图可以看出改性后L沸石表面出现了B酸中心和L酸中心.
Abstract:

In order to optimize the application of L zeolite in petroleum catalytic cracking, L zeolite was modified by different ion exchange methods. The effects of different ion exchange methods on reducing the potassium content of L zeolite and the changes of L zeolic acid properties after modification were investigated. The results showed that the combination of ion exchange and water vapor treatment was more effective in reducing the potassium content of L zeolite, and the potassium oxide content of L zeolite samples after tertiary ion exchange and tertiary water vapor treatment could be reduced to 0.82%. The results of NH3–TPD heating and desorption experiments showed that the strength of the acid center on the modified L zeolite surface increased, the acid strength distribution became wider, and the total acid content decreased. From the infrared pyridine adsorption spectra, it can be seen that B acid center and L acid center appeared on the surface of L zeolite after modification.

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更新日期/Last Update: 1900-01-01