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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/11451

Title: Validation of BET Specific Surface Area for Heterogeneous Ziegler-Natta Catalysts based on α_S-plot
Authors: Taniike, Toshiaki
Chammingkwan, Patchanee
Thang, Vu Quoc
Funako, Toshiki
Terano, Minoru
Keywords: Ziegler-Natta polymerization
Nitrogen adsorption
BET method
Issue Date: 2012-06-15
Publisher: Elsevier
Magazine name: Applied Catalysis A: General
Volume: 437-438
Start page: 24
End page: 27
DOI: 10.1016/j.apcata.2012.06.006
Abstract: Specific surface area based on the BET method in N_2 adsorption has historically posed poor correlation with olefin polymerization activity of heterogeneous Ziegler-Natta (ZN) catalysts. We have investigated the validity of the BET surface area for ZN catalysts based on the α_S-plot method, where non-porous core–shell MgO/MgCl_2/TiCl_4 catalysts were used as a reference material. The α_S-plots for typical industrial ZN catalysts clarified the presence of two classes of micropores and resultant difficulty to isolate a multilayer adsorption region for the BET method. The results cast doubt on the application of the BET method to evaluate the surface area of heterogeneous ZN catalysts.
Rights: NOTICE: This is the author's version of a work accepted for publication by Elsevier. Toshiaki Taniike, Patchanee Chammingkwan, Vu Quoc Thang, Toshiki Funako, Minoru Terano, Applied Catalysis A: General, 437-438, 2012, 24-27, http://dx.doi.org/10.1016/j.apcata.2012.06.006
URI: http://hdl.handle.net/10119/11451
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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