微孔物质BET测试数据的筛选、处理和检验

经典的BET测试适用于介孔和无孔物质,测试的相对压力范围是p/p0=0.05–0.3。现在人们对含有微孔的物质也用BET表征,可能的测试相对压力范围是p/p0=0.005–0.3。所得数据比较多,需要筛选才能找出符合BET模型的数据。有的仪器公司最新版软件有辅助筛选功能,使用起来非常方便。这类软件是基于Rouquerol变换方法编写的。我们试着摸索了这个方法的数学推导过程,然后根据文献和多人积累的测试经验归纳总结出了BET数据处理的5个步骤,整个处理过程在Origin软件上即可实现,适用于所有容量法BET仪器的数据筛选、处理和检验。

Screening,Processing and Checking of BET Test Data

The classic BET test is applicable to mesoporous and nonporous materials, and the relative pressure (p/p₀) range is 0.05-0.3. Currently, BET is also used to characterize the substances containing microspores. The relative pressure range is 0.005-0.3. The large amount data need to be screened to find out the data that conform to the BET model. Some of the latest software provided by the instrumental company have very convenient auxiliary screening function, which is written based on Rouquerol transform method. We tried to find out the mathematical deduction process of this method. Then, according to the literature and the testing experience by many individuals, we summed up the 5 steps of BET data processing. The entire process can be realized on the Origin software. It is suitable for the data screening, processing and checking of all volumetric BET methods.