Studies on Preparation of Supported Cobalt-molybdenum Nitrides and Their Catalytic Behaviour for Pyridine HDN

Abstract

Abstract: γ Alumina supported bi(mono)metallic transition metal nitrides were prepared respectively with 12 phosphomolybdic acid plus cobalt nitrate(denoted as CoMoN-Ⅰ and CoMoN-Ⅱ related with the precursor of the nitride, CoMoN-Ⅰ, calcined at 773 Kfor 6 h before nitriding), ammonium heptamolybdate plus cobalt nitrate(denoted as CoMoN-Ⅲ), and only ammonium heptamolybdate(denoted as MoN-Ⅳ) as the precursor active phases, using temperature programmed reduction with NH₃, and characterized with BET, XRD, XPS, H₂-TPDand Raman. Pyridine was selected as a model substrate in order to evaluate the HDNcatalytic activity of nitrides synthesized above. It was found that CoMoN-Ⅰ possesses conspicuously high pyridine HDNactivity as compared to that of CoMoN-Ⅱ, CoMoN-Ⅲ and MoN-Ⅳ.

Key words: Nitride, 12-Phosphomolybdic acid, γ-Alumina, Pyridine, Hydrodenitrogenation

CLC Number:

O643.1

TrendMD:

QI Xing-Yi, XIONG Guang, YANG Shu-Wu, XIN Qin . Studies on Preparation of Supported Cobalt-molybdenum Nitrides and Their Catalytic Behaviour for Pyridine HDN[J]. Chem. J. Chinese Universities, 1998, 19(10): 1645.

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Studies on Preparation of Supported Cobalt-molybdenum Nitrides and Their Catalytic Behaviour for Pyridine HDN

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