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Elsevier, Applied Catalysis A: General, 1-2(224), p. 167-178

DOI: 10.1016/s0926-860x(01)00769-4

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A FT-IR study of the adsorption of indole, carbazole, benzothiophene, dibenzothiophene and 4,6-dibenzothiophene over solid adsorbents and catalysts

Journal article published in 2002 by Maria Angeles Larrubia, Aı̀da Gutièrrez-Alejandre, Jorge Ramı̀rez, Guido Busca ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The adsorption of benzothiophene (BT), dibenzothiophene (DBT), 4,6-dimethyldibenzothiophene (DMDBT), dibenzofuran (DBF), indole (IND) and carbazole (CARB) on alumina, zirconia and magnesia has been studied by IR spectroscopy. The main adsorption process is due to adsorption on Lewis sites or on acid–base pairs. On alumina the adsorption is strongest, desorption being not obtained above 723K. BT also undergoes a transformation with likely the heteroaromatic ring opening. Adsorption of 4,6-DBT is definitely limited in extent likely due to steric hindrance. The N-containing compounds IND and CARB are adsorbed dissociatively with breaking of the NH bond.