PHILLIPS CATALYSTS SYNTHESIZED OVER VARIOUS SILICA SUPPORTS: CHARACTERIZATION AND THEIR CATALYTIC EVALUATION IN ETHYLENE POLYMERIZATION

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AHMADI EBRAHIM; MOHAMADNIA ZAHRA; RAHIMI SAJJAD; ARMANMEHR MOHAMMAD HASSAN; HEYDARI MOHAMMAD HOSSEIN; RAZMJOO MAHMOOD

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Journal: POLYOLEFINS JOURNALS Year:2016 | Volume:3 | Issue:1 Page(s): 23-36

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Title

PHILLIPS CATALYSTS SYNTHESIZED OVER VARIOUS SILICA SUPPORTS: CHARACTERIZATION AND THEIR CATALYTIC EVALUATION IN ETHYLENE POLYMERIZATION

Author(s)

Keywords

SILICA AEROGEL

GRACE SILICA

CHROMIUM CATALYST

ETHYLENE POLYMERIZATION

SHISH-KEBAB

Abstract

Ethylene polymerization was carried out using Phillips CHROMIUM CATALYST based on silica supports such as SILICA AEROGEL, SiO2 (Grace 643), and titanium modified SiO2 (G 643), and the results were compared with other catalysts based on SiO2 (Aldrich), SBA-15 (Hex), SBA-15 (Sp) and MCM-41. A combination of TGA, DSC, XRD, nitrogen adsorption, SEM, ICP, FTIR and other analyses were used to characterize the materials. The results showed that the chromium was successfully introduced into silica supports. SHISH-KEBAB polyethylene was prepared via in situ ETHYLENE POLYMERIZATION with the Cr/SiO2 (G 643) and Cr/Ti/SiO2 (G 643) catalytic systems. A comparison between different types of catalysts revealed that the polymerization activity of Cr/SiO2 (G 643) was significantly increased to 191 kg PE (g Cr) -1 h-1 due to the higher pore volume and pore diameter of GRACE SILICA compared to the other supports. Also, the polymerization activity of the Cr/SiO2 (G 643) catalyst was significantly improved by Ti-modification.

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APA: Copy

AHMADI, EBRAHIM, MOHAMADNIA, ZAHRA, RAHIMI, SAJJAD, ARMANMEHR, MOHAMMAD HASSAN, HEYDARI, MOHAMMAD HOSSEIN, & RAZMJOO, MAHMOOD. (2016). PHILLIPS CATALYSTS SYNTHESIZED OVER VARIOUS SILICA SUPPORTS: CHARACTERIZATION AND THEIR CATALYTIC EVALUATION IN ETHYLENE POLYMERIZATION. POLYOLEFINS JOURNALS, 3(1), 23-36. SID. https://sid.ir/paper/347231/en

Vancouver: Copy

AHMADI EBRAHIM, MOHAMADNIA ZAHRA, RAHIMI SAJJAD, ARMANMEHR MOHAMMAD HASSAN, HEYDARI MOHAMMAD HOSSEIN, RAZMJOO MAHMOOD. PHILLIPS CATALYSTS SYNTHESIZED OVER VARIOUS SILICA SUPPORTS: CHARACTERIZATION AND THEIR CATALYTIC EVALUATION IN ETHYLENE POLYMERIZATION. POLYOLEFINS JOURNALS[Internet]. 2016;3(1):23-36. Available from: https://sid.ir/paper/347231/en

IEEE: Copy

EBRAHIM AHMADI, ZAHRA MOHAMADNIA, SAJJAD RAHIMI, MOHAMMAD HASSAN ARMANMEHR, MOHAMMAD HOSSEIN HEYDARI, and MAHMOOD RAZMJOO, “PHILLIPS CATALYSTS SYNTHESIZED OVER VARIOUS SILICA SUPPORTS: CHARACTERIZATION AND THEIR CATALYTIC EVALUATION IN ETHYLENE POLYMERIZATION,” POLYOLEFINS JOURNALS, vol. 3, no. 1, pp. 23–36, 2016, [Online]. Available: https://sid.ir/paper/347231/en

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