EXPLORING THE POTENTIAL OF INFRARED SPECTROSCOPY ON THE STHDY OF THE ADSORPTION/DESORPTION OF SILOXANES FOR BI

TÍTULO

EXPLORING THE POTENTIAL OF INFRARED SPECTROSCOPY ON THE STHDY OF THE ADSORPTION/DESORPTION OF SILOXANES FOR BIOGAS PURIFICATION

DOCUMENTO - ARTIGO CIENTÍFICO 

AUTORES - VU TUNG LAM TRAN, PATRICK GÉLIN, CORINNE FERRONATO, LUDOVIC FINE, JEAN MARC CHOVELON, GEORGETA POSTOLE

RESUMO/ABSTRACT

A commercial activated carbon (AC) was characterized by physicochemical methods. The AC adsorption/desorption properties and the adsorbent regenerability were evaluated for the removal of octamethylcyclotetrasiloxane (D4), a common siloxane impurity in biogases. In situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) was employed to investigate the adsorption of D4 on AC at room temperature and its thermodesorption up to 300 ?C. The AC was activated in N2 at varying temperatures within the 25–300 ?C interval. The striking feature is the polymerization of D4 observed during the desorption experiment followed by the release of PolyDimethylSiloxane (PDMS) in the gas phase. The thermal treatment before adsorption is proposed to influence the D4–AC interaction.

Profissionais, estudantes e interessados na cadeia do biogás e, atuantes nas diversas áreas, etapas de projetos ou operação na produção de biogás.