Next Article in Journal
Monometallic Supported Gold Catalysts in Organic Transformations: Ring Making and Ring Breaking
Next Article in Special Issue
Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review
Previous Article in Journal
One-Pot Liquid-Phase Catalytic Conversion of Ethanol to 1-Butanol over Aluminium Oxide—The Effect of the Active Metal on the Selectivity
Catalysts 2012, 2(1), 85-100; doi:10.3390/catal2010085
Article

Hydrogenation of Anthracene in Supercritical Carbon Dioxide Solvent Using Ni Supported on Hβ-Zeolite Catalyst

* ,
 and
U.S. Environmental Protection Agency, Office of Research & Development, National Risk Management Research Laboratory, 26 West, Martin Luther King Dr., Cincinnati, OH 45268, USA
* Author to whom correspondence should be addressed.
Received: 26 October 2011 / Revised: 20 December 2011 / Accepted: 11 January 2012 / Published: 30 January 2012
(This article belongs to the Special Issue Feature Papers)
View Full-Text   |   Download PDF [354 KB, uploaded 30 January 2012]   |   Browse Figures

Abstract

Catalytic hydrogenation of anthracene was studied over Ni supported on Hβ-zeolite catalyst under supercritical carbon dioxide (sc-CO2) solvent. Hydrogenation of anthracene in sc-CO2 yielded 100% conversion at 100 °C, which is attributed to the reduced mass transfer limitations, and increased solubility of H2 and substrate in the reaction medium. The total pressure of 7 MPa was found to be optimum for high selectivity of octahydroanthracene (OHA). The conversion and selectivity for OHA increased with an increase in H2 partial pressure, which is attributed to higher concentration of hydrogen atoms at higher H2 pressures. The selectivity reduced the pressure below 7 MPa because of enhanced desorption of the tetrahydro-molecules and intermediates from Ni active sites, due to higher solubility of the surface species in sc-CO2. The selectivity of OHA increased with the increase in catalyst weight and reaction time. The rate of hydrogenation of anthracene was compared with that found for napthalene and phenanthrene. The use of acetonitrile as co-solvent or expanded liquid with CO2 decreased the catalytic activity.
Keywords: supercritical carbon dioxide; nickel/zeolite catalyst; anthracene; hydrogenation supercritical carbon dioxide; nickel/zeolite catalyst; anthracene; hydrogenation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Sahle-Demessie, E.; Devulapelli, V.G.; Hassan, A.A. Hydrogenation of Anthracene in Supercritical Carbon Dioxide Solvent Using Ni Supported on Hβ-Zeolite Catalyst. Catalysts 2012, 2, 85-100.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

Cited By

[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert