氩气测定多种沸石的高精度等温吸附线

氩气测定多种沸石的高精度等温吸附线 K. Nakai*, J. Sonoda, M. Yoshida, M. Hakuman and H. Naono 日本拜耳公司BEL Japan, Inc., 1-9-1 Haradanaka, Toyonaka-shi, Osaka, 561-0807, Japan. E-mail: kazu@nippon-bel.co.jp 简介 本实验检测了两种不同硅烷醇成分的硅土和两种不同氧化铝（质子）成分的MFI沸石的氩气等温吸附（液氩87.3K）和氮气等温吸附（液氮77.4K）。硅烷醇或质子含量变化对氮气吸附有显著影响，但对氩气吸附的影响非常小。我们在相对压力p/po=10–7–0.99的范围内对七种不同微孔大小的沸石进行了氩气的吸附测定。这七种沸石分别是：MFI (ZSM-5)、MTW (ZSM-12)、AFI (SSZ-24)、AFI (AlPO-5)、VFI (VPI-5) [A组] 以及LTA (A型-Ca)、 FAU (Y型) [B组]。A组沸石的微孔通道不含笼结构，而B组有笼结构和窗口效应。研究发现：A组沸石氩气原子的Polanyi吸附势只与孔通道尺寸密切相关，而B组沸石氩气原子吸附势与笼尺寸和孔通道大小都相关。 ……Prior to gas adsorption measurement, the zeolite samples were pretreated in vacuo at 623 K for 10 h. The adsorption isotherms of Ar at 87.3 K (boiling point of liquid argon) and of N2 at 77.4 K (boiling point of liquid nitrogen) were measured by BELSORP-max, which has three pressure transducers of 0.0133 kPa, 1.33 kPa and 133 kPa in full scale. …… From Zeolites to Porous MOF Materials – the 40th Anniversary of International Zeol ite Conf erenc e 选自“从沸石到多孔MOF材料”— 第40届国际沸石大会 R. Xu徐如人, Z. Gao,高滋 J. Chen and W. Yan闫文付 (Editors)等 . 2007 Elsevier B.V. All rights reserved.