02074nas a2200253   4500008004100000022001400041245011000055210006900165260010800234300001200342490000700354520108600361653003401447653002701481653002701508653002101535653002401556100002201580700001601602700002301618700002901641700002101670856012901691       2013                        eng d  a1346-880400aEffect of carbon dioxide pressure on 4-t-butylphenol hydrogenation activity of supported rhodium catalyst0 aEffect of carbon dioxide pressure on 4tbutylphenol hydrogenation  aYOYU-KANDA BLDG. 4F, 1-8-4 KANDASUDA-CHO, CHIYODA-KU, TOKYO, 108-0041, JAPANbJAPAN PETROLEUM INSTcMAY  a165-1700 v563 a<p>Hydrogenation of 4-t-butylphenol over an activated carbon-supported rhodium catalyst in carbon dioxide solvent was analyzed based on phase observation with a view cell and calculations of the solubility of 4-t-butylphenol using the Peng-Robinson equation of state as a function of carbon dioxide pressure. The reaction experiments showed that the initial reaction rate of 4-t-butylphenol at 313 K under 2 MPa of hydrogen pressure was increased by the addition of carbon dioxide, especially above a total pressure of 11 MPa. Direct visual observation showed that the solubility of 4-t-butylphenol increased with higher carbon dioxide pressure. The calculations based on the Peng-Robinson equation of state also showed that the solubility of 4-t-butylphenol in the 4-t-butylphenol carbon dioxide hydrogen (2 MPa) system at 313 K significantly increased by addition of carbon dioxide above a total pressure of 11 MPa. We concluded that the increase in the hydrogenation rates was caused by the increased concentration of 4-t-butylphenol substrate in the carbon dioxide solvent.</p>10a4-t-Butylphenol hydrogenation10aCarbon dioxide solvent10aPeng-Robinson equation10aRhodium catalyst10aSupercritical fluid1 aHiyoshi, Norihito1 aSato, Osamu1 aYamaguchi, Aritomo1 aRode, Chandrashekhar, V.1 aShirai, Masayuki  uhttps://library.ncl.res.in/content/effect-carbon-dioxide-pressure-4-t-butylphenol-hydrogenation-activity-supported-rhodium-0