Characterization of microporous carbons by using TGA curves measured under controlled conditions

Autor:	R.K. Gilpin, Mietek Jaroniec, J. Ramler, Jerzy Choma
Rok vydání:	1996
Předmět:	Thermogravimetric analysis Evaporation chemistry.chemical_element Microporous material Condensed Matter Physics Thermogravimetry chemistry Chemical engineering Desorption medicine Organic chemistry Physical and Theoretical Chemistry Porosity Instrumentation Carbon Activated carbon medicine.drug
Zdroj:	Thermochimica Acta. 272:65-73
ISSN:	0040-6031
DOI:	10.1016/0040-6031(95)02460-3
Popis:	Microporous active carbons of differing structural and surface properties were studied by thermogravimetry (TGA) under controlled conditions. Weight loss curves were measured for various carbon samples wetted and saturated with water, n-butanol, benzene and n-heptane using a high-resolution thermogravimetric analyzer. This analyzer is capable of maintaining controlled conditions. Analysis of the TGA curves showed that molecules desorb from the surface via a multi-step process. For the samples wetted with liquids the initial step reflects evaporation of the excess liquid. The subsequent steps, observed for both types of samples (wetted in liquids and saturated in their vapors), reflect evaporation of adsorbate from pores and its thermodesorption from fine pores and from the carbon surface. These latter features of the TGA curves were used to obtain information about porosity and surface heterogeneity of the active carbons studied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::527e352af39053475e77825143f32453 https://doi.org/10.1016/0040-6031(95)02460-3 Zobrazit plný text záznamu Full Text from ScienceDirect