表面活化沸石外比表面积的试验研究

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基金项目:

中国地质大学(武汉)留学回国人员科研启动基金；国家留学回国人员科研启动基金资助；是美国能源部资助研究项目"DEAR2195MC32108"的一部分。

An Experimental Investigation on External Surface Area of Surfactant-modified Zeolite

1. Guanzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China;
2. Institute of Geochemistry, China University of Geosciences, Wuhan 430074, China;
3. Department of Environmental Studies, University of West Florida, 11000 University Parkway, Pensacola, FL 32514;
4. Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM 87801

摘要: 利用阳离子表面活化剂(HDTMA Cl)对天然沸石进行了表面活化改性,并使用BET法测定了表面活化沸石颗粒(SMZ)和天然沸石颗粒的外比表面积,试验结果表明,粒径为4~100目时,天然沸石的比表面积为13.44~14.32m²/g,活化沸石的比表面积为4.18~6.79m²/g,与天然沸石相比较,其值要小1~2倍。通过轻拍式原子力显微镜镜像分析(TMAFM),探讨了SMZ外比表面积发生变化的原因。
- HDTMA /
- 表面活化沸石 /
- 外比表面积 /
- 原子力显微镜方法
Abstract: The external surface area of raw zeolite and surfactant-modified zeolite (SMZ) was measured using BET method. The experimental results showed that the external surface area of raw zeolite at 4~6 mesh, 8~14 mesh, 14~40 mesh and 80~100 mesh was 13.82 m²/g, 13.44 m²/g, 14.28 m²/g and 14.32 m²/g respectively. While for the SMZ, the external surface area was significantly lower than that of the raw zeolite, was 6.79 m²/g, 5.88 m²/g, 5.57 m²/g, 4.18 m²/g respectively. The surface character of raw zeolite and SMZ were examined with tapping-mode atomic force microscopy (TMAFM). TMAFM images showed that the surfactant resulted in the decreasing of the surface area of the SMZ.
- HDTMA /
- Surfactant-modified zeolit /
- External Surface Area /
- Atomic Force Microscopy