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本文对一些催化剂样品的BET比表面值与从等温线吸附支算出的累积比表面和从等温线脱附支算出的累积比表面进行了比较,表明吸附支累积比表面与BET 比表面符合得更好些。同时把几个催化剂样品从TEM 超薄切片照片测得的孔径范围数据与从吸附支算出的孔分布及从脱附支算出的孔分布数据相比较,表明吸附支孔径范围与电镜照片测得的数据较符合。这些都支持了安德森的看法,即对大多数催化物质的孔分布计算应采用吸附支而不应采用脱附支。本文还对几个有代表性的催化剂吸附支数据作了t-图,说明在吸附支的较低相对压力时就有毛细管冷凝发生.因而可用吸附支来计算孔分布。
In this paper, the BET specific surface area of some catalyst samples is compared with the cumulative specific surface calculated from isotherm adsorption and the cumulative specific surface calculated from isotherm desorption. Better At the same time, the comparison of the pore size data of several catalyst samples from TEM ultra-thin section photographs with the pore distribution calculated from the adsorption branch and the pore distribution data calculated from the desorption shows that the adsorption pore size range and the electron micrograph Data more consistent. All of these support Anderson’s view that the adsorption branch should be used for the calculation of the pore distribution of most catalytic species rather than the desorption branch. In this paper, t-maps of several representative adsorbent support data are also shown, indicating that capillary condensation occurs at the lower relative pressure of the adsorbate branch, so pore distribution can be calculated using the adsorptive branch.