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FT-IR analysis of borate-promoted NiMo/Al2O3 hydrotreating catalysts

✍ Scribed by Elaine C. DeCanio; Jeffrey G. Weissman

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
586 KB
Volume
105
Category
Article
ISSN
0927-7757

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✦ Synopsis

A series of boron-modified commercial Ni-Mo/A1203 hydrotreating catalysts have been characterized by IR analysis of adsorbed NO and pyridine and by gas-oil sulfur-and nitrogen-removal activities. Sulfur removal activity was found to correlate with the 1690 cm -1 (Mo(NO)22÷) band in the NO adsorption spectra. Nitrogen removal activity was found to be dependent on support Br6nsted acidity as measured by the density of the pyridinium band at 1540 cm-1 in the pyridine adsorption spectra. At higher boron loadings, over 1.8 wt.% boron, the presence of bulk borate phases results in poor catalytic performance.

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✍ Jenny M. Jones; Ronald A. Kydd; P.Michael Boorman; Phyllis H. van Rhyn 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 828 KB

Ni Mo/A1203 catalysts containing two promoters, fluoride and phosphorus, were studied to learn whether the benefits of both promoters could be combined to produce a superior catalyst. Initially, two series of catalysts differing in the sequence of impregnation of the additives were prepared and test