Thermochemical properties of the hydrogen getter DEB

Vapor pressures of the hydrogen getter 1,4 bis(phenylethynyl)benzene (DEB), together with two of its derivatives namely DEB mixed with carbon-supporte d Pd (DEB-Pd/C) and hydrogenated DEB-Pd/C, are measured from room temperatu re to the melting temperature (179 degrees C). The corresponding thermodyna mic information, such as the enthalpy of vaporization, boiling point, and t he deviation from ideal solution behavior of DEB-Pd/C, has been derived fro m the vapor pressure-temperature relationships. In addition, the hydrogenat ion kinetics of DEB-PdfC (powder form and rod-like) has also been investiga ted at a fixed pressure of 13.3 Pa (0.1 Torr) and at four temperatures, 21 degrees C, 35 degrees C, 45 degrees C and 55 degrees C. (C) 1999 Elsevier S cience B.V. All rights reserved.