Τίτλος:
Determination of adsorption entropies on solid surfaces by reversed-flow
gas chromatography
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The reversed-flow gas chromatography (RF-GC) method has been applied to
measure the time separation of adsorption entropies and their
probability density functions, when acetic and formic acid vapors,
responsible for artifacts degradation inside museums, are adsorbed on
various heterogeneous surfaces. The solid materials studied were Penteli
marble and solid metals (lead, copper and iron), which are commonly used
for the construction of the artifacts. Physicochemical measurements were
performed at various temperatures in the range 353-473 K, the surface
coverage theta being also calculated over time. A new mathematical
model, based on well known equations was used in order to extract the
above quantities. (C) 2007 Elsevier B.V. All rights reserved.
Συγγραφείς:
Dremetsika, A. V.
Siskos, P. A.
Katsanos, N. A.
Περιοδικό:
Journal of Hazardous Materials
Εκδότης:
ELSEVIER SCIENCE BV
Λέξεις-κλειδιά:
adsorption entropy; inverse gas chromatography; heterogeneous surfaces
DOI:
10.1016/j.jhazmat.2007.06.108
