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http://hdl.handle.net/10119/11451
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| 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
Polyolefin
Nitrogen adsorption
BET method
α_S-Plot |
| 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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