Effect of the composition and acidity of supported sulfide catalysts on their activity and deactivation in guaiacol hydrodeoxygenation View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2014-10

AUTHORS

P. A. Nikulshin, V. A. Sal’nikov, E. O. Zhilkina, A. A. Pimerzin

ABSTRACT

The following catalysts have been prepared: XMo6HPC/Al2O3, based on Anderson-type heteropoly compounds (HPCs), with the general formula XMo6HPC in which the central heteroatom is a fourth-row p- or d-element (X = Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Al); Co6(CA)-PMo12/support, based on 12-phosphomolybdic acid and cobalt citrate, in which the support is Sibunit, Al2O3, carbonized alumina, or alumina modified with zeolite ZSM-5 or Beta. The supports and catalysts have been characterized by low-temperature nitrogen adsorption, X-ray powder diffraction, and temperature-programmed ammonia desorption. The properties of the catalysts in guaiacol hydrodeoxygenation (HDO) have been investigated in a flow reactor at 260°C, 3.0 MPa, a feed hourly space velocity of 80 h−1, and H2: feed = 500 L/L. The activity of the XMo6HPC/Al2O3 catalysts depends on the kind of heteroatom X: the most active catalysts are those with X = Co or Ni, and the least active ones are those with X = Cu. There is a linear antibatic correlation between the HDO activity of the catalysts and the acidity of the support. The lower activity of the zeolite-containing catalysts is due to their high degree of deactivation. Catalysts supported on carbonized alumina, which proved to be most active and most resistant to deactivation, are recommended for the HDO of vegetable raw materials. More... »

PAGES

338-347

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s2070050414040126

DOI

http://dx.doi.org/10.1134/s2070050414040126

DIMENSIONS

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