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HYDROGENATION OF POLYCYCLIC AROMATIC COMPOUNDS USING NI SUPPORT ON H-BETA ZEOLITE IN SUPERCRITICAL CARBON DIOXIDE
Citation:
SAHLE-DEMESSIE, E. AND V. DEVULAPELLI. HYDROGENATION OF POLYCYCLIC AROMATIC COMPOUNDS USING NI SUPPORT ON H-BETA ZEOLITE IN SUPERCRITICAL CARBON DIOXIDE. Presented at American Chemical Society 234th National Meeting & Exposition, Boston, MA, August 19 - 23, 2007.
Impact/Purpose:
To inform the public.
Description:
The primary rationale for use of supercritical carbon dioxide as a solvent in hydrogenation is the elimination of mass transfer limitations, through enhancement of the solubility of hydrogen at the reaction locus. Hydrogenation of anthracene was performed using NiHB-zeolite catalyst and carbon dioxide as a solvent. Optimization of the reaction parameters were carried out for best tuning of the solvent properties of carbon dioxide. The conversion of anthracene increased from 32 to 60% on 5-30wt% and metal loading of 20-wt% was found to be optimum. The conversion of anthracene found to be slightly increased on increasing reaction pressure from 5.5 MPa to 12.4 MPa and remained constant there after. We are also studying the effects partial pressure of hydrogen, effect of various supports and metal-support interactions, and effect of catalyst properties on hydrogenation of anthracene.