• validation of bet specific surface area for heterogeneous ziegler-natta catalysts based on αs-plot

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     specific surface area based on the bet method in n2 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 αs-plot method, where non-porous core–shell mgo/mgcl2/ticl4 catalysts were used as a reference material. the αs-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.

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