Abstract

OSPINA, V; BUITRAGO-SIERRA, R  and  LOPEZ, D. HDO of guaiacol over NiMo catalyst supported on activated carbon derived from castor de-oiled cake. Ing. Investig. [online]. 2015, vol.35, n.2, pp.49-55. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.v35n2.49838.

Physical and chemical activation methods were used to prepare two different activated carbons (ACs) from castor de-oiled cake. H₂O/CO₂ mixture was used as the physical activating agent, and for chemical activation potassium carbonate (K₂CO₃) was used. For both materials, textural and chemical properties were characterized by N₂ adsorption-desorption isotherms, thermogravimetric analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), thermal programmed reduction (TPR), X-ray fluorescence (XRF), and scanning electron microscopy (SEM). The ACs were used as supports for NiMo sulfide catalysts, which were prepared by wetness impregnation and in-situ sulfided for the hydrodeoxygenation (HDO) of guaiacol (GUA) as a model compound of bio-oil. The HDO reaction was carried out in a typical batch reactor at 5 MPa of H₂ and 350 °C. Under the same test conditions, commercial catalysts were also tested in the reaction. Although the commercial catalysts displayed higher GUA conversion, the prepared catalysts showed higher activity and non-oxygenated and saturated products yield.

Keywords : Castor de-oiled cake; activated carbon; hydrodeoxygenation; bio-oils.

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