| 用CO2吸附法分析分子筛的孔结构 |
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| 引用本文： | 黄艳芳,马正飞,刘晓勤,姚虎卿. 用CO2吸附法分析分子筛的孔结构[J]. 离子交换与吸附, 2009, 25(4) |
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| 作者姓名： | 黄艳芳 马正飞 刘晓勤 姚虎卿 |
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| 作者单位： | 南京工业大学,材料化学工程国家重点实验室,南京,210009;南通职业大学,化学工程系,南通,226007;南京工业大学,材料化学工程国家重点实验室,南京,210009 |
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| 基金项目： | 江苏省高校自然科学重大基础研究项目 |
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| 摘 要： | 以NaA,NaY和NaZSM-5分子筛为研究对象,以CO2为吸附质,通过吸附数据测定,研究分子筛材料微孔结构的吸附表征方法.计算了NaA、NaY和NaZSM-5分子筛的微孔孔容,其中基于D-A方程的微孔孔容值与文献值一致.根据CO2吸附数据分析了3种分子筛的孔径分布.发现对于含有球形孔结构的NaA,NaY分子筛和NaA+NaY混合物,HK(Horvath-Kawazoe)球形模型(HKsphere)能够很好地描述其孔径分布,而HK柱状模型(HKcylinder)能够很好地表征具有柱状孔道结构的NaZSM-5分子筛.单一的HK方法不能表征同时含有柱状孔和球形孔的NaA+NaZSM-5混合物,使用HKcylinder只能得到混合物材料中柱状孔的分布情况,而使用HKsphere只能得到球形孔的分布情况.
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| 关 键 词： | 吸附表征 吸附质 二氧化碳 分子筛 孔径分布 |
STUDY ON THE PORE SIZE DISTRIBUTIONS OF ZEOLITES BY CO_2 ADSORPTION |
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| HUANG Yanfang,MA Zhengfei,LIU Xiaoqin,YAO Huqing. STUDY ON THE PORE SIZE DISTRIBUTIONS OF ZEOLITES BY CO_2 ADSORPTION[J]. Ion Exchange and Adsorption, 2009, 25(4) |
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| Authors: | HUANG Yanfang MA Zhengfei LIU Xiaoqin YAO Huqing |
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| Affiliation: | HUANG Yanfang1,2 MA Zhengfei1 LIU Xiaoqin YAO Huqing1 1. State Key Laboratory of Materials-oriented Chemical Engineering Nanjing University of Technology,Nanjing 210009,China 2. Department of Chemical Engineering,Nantong Vocational College,Nantong 226007,China |
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| Abstract: | NaA,NaY and NaZSM-5 zeolites were characterized by CO2 adsorption at 273K. The results showed that the microporous volumes basing on D-A model were in agreement with the data form literature. The Horvath-Kawazoe (HK) models (HKsphere,HKcylinder and HKslit) were used to analyze pore size distributions (PSDs). It was shown that the HKsphere model correctly described the pore structure of NaA,NaY and NaA+NaY mixture,while HKcylinder model could well characterize the pore structure of NaZSM-5. In the case of Na... |
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| Keywords: | Adsorption characterization Adsorptive Carbon dioxide Zeolite Pore size distribution. |
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