Modification of the Acid-base and Catalytic Properties of CuCl2-KCl-LaCl3/-Al2O3 by MgAl2O4 in Ethane Oxychlorination

• Autorzy: Liu J. , Sui Y. , Zhou G. , Zhen K. , Zhang X. , Cheng T.
• Języki publikacji: EN

Abstrakty

EN

Effect of MgAl2O4 on the structure, acidity as well as catalytic activity of CuCl2-KCl-LaCl3/gamma-Al2O3 catalyst in ethane oxychlorination was studied. Impregnation of gamma-Al2O3 with Mg and Al nitrates formed magnesium aluminate spinel on the support. TPR results showed that Cu species were located on both -Al2O3 and MgA gamma2O4 phases. With modification of -Al2O3 by MgAl2O4, the interaction between Cu species and support weakened and the surface active species CuCl2 increased. Formation of MgA gamma2O4 leads to a decrease of strong acid sites and an increase of weak acid sites. Much larger quantities of coke were deposited on the CuCl2-KCl-LaCl3/gamma-Al2O3 than on the modified catalyst, which was attributed to its more strong acid sites. Based on these factors CuCl2-KCl-LaCl3/MgAl2O4-Al2O3 catalyst exhibits better catalytic activity and stability than gamma-Al2O3 supported catalyst, and the highest vinyl chloride selectivity reached 46.8% and was still 40.6% after 210 h reaction.

Słowa kluczowe

EN

oxychlorination; ethane; vinyl chloride; magnesium aluminate; spinel

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2007
• Tom: Vol. 81, nr 1
• Strony: 95--101
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Liu J.

autor

Sui Y.

autor

Zhou G.

autor

Zhen K.

autor

Zhang X.

autor

Cheng T.

• College of Chemistry, Jilin University, Changchun 130021, P.R. China

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