Characterization of natural chabazite and 5A synthetic zeolites: Part I. Thermal and outgassing properties
Characterization of natural chabazite and 5A synthetic zeolites: Part I. Thermal and outgassing properties
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DOI：
10.1016/0021-9797(84)90083-3
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发表时间：
1984-05
影响因子：
9.9
通讯作者：
J. Stakebake
中科院分区：
文献类型：
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作者：
J. Stakebake
从四个地理位置获得天然菱沸石样品，并从玄武岩基质中大量分离。研究了每个样品的热性能和脱水特性，并与从5A型合成沸石获得的结果进行了比较。菱沸石和5A沸石的DTA和DTG谱与文献报道的谱进行了比较。通过DTA和DTG分析检测到菱沸石样品中存在碳酸钙杂质，并通过X射线衍射、质谱和程序升温脱附（TPD）进行鉴定。用程序升温脱附（TPD）方法研究了水在菱沸石和5A沸石上的物理吸附。一个键合机制表明菱沸石的活化能，艾德，为9.6千卡/摩尔的解吸。两个键合机制的物理吸附检测的5A沸石，一个与13.7千卡/摩尔和第二个与15.0千卡/摩尔的ED。
Samples of natural chabazite were obtained from four geographical locations and separated in bulk from a basalt matrix. Thermal properties and dehydration characteristics were investigated for each sample and compared with the results obtained from a Type 5A synthetic zeolite. Both DTA and DTG spectra for the chabazite and the 5A zeolite compare with those reported in the literature. The presence of calcium carbonate as an impurity in one chabazite sample was detected by DTA and DTG analysis and identified by X-ray diffraction, mass spectroscopy, and temperature-programmed desportion (TPD). TPD was used to characterize the physical adsorption of water on both chabazite and 5A zeolites. One bonding mechanism was indicated for chabazite with an activation energy,Ed, for desorption of 9.6 kcal/mole. Two bonding mechanisms for physical adsorption were detected for the 5A zeolite; one with anEdof 13.7 kcal/mole and the second with anEdof 15.0 kcal/mole.