Continuous liquid-phase valorization of bio-ethanol towards bio-butanol over metal modified alumina

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Toni Riittonen, Kari Eränen, Päivi Mäki-Arvela, Andrey Shchukarev, Anne-Riikka Rautio, Krisztian Kordas, Narendra Kumar, Tapio Salmi, Jyri-Pekka Mikkola
Publication year: 2015
Journal: Renewable Energy
Volume number: 74
Start page: 369
End page: 378
eISSN: 1879-0682


Abstract

Commercial mixed-phase aluminum oxide was used as a heterogeneous catalyst support, providing slightly basic properties which are well-suited for the condensation of bio-ethanol to C4 hydrocarbons, such as 1-butanol. Different metals (Cu, Ni and Co), at various metal loadings were deposited on the support. Consequently, the catalytic reactions were carried out in a continuous laboratory-scale fixed bed reactor operated at 240 °C and 70 bar. The catalysts were characterized by means of XRD, TEM, FT-IR, XPS and ICP-OES. Different metals were found to give entirely different product distributions. With the best catalysts, the selectivities towards 1-butanol close to 70% were reached, while the ethanol conversion typically varied between 10 and 30% – strongly depending on the metal applied. It was observed that low loading of copper and high loading of nickel were responsible for the formation of 1-butanol, whereas cobalt and high loading of copper resulted in the production of ethyl acetate. The reaction was found to be extremely sensitive to catalyst preparation conditions and procedures such as metal loading, calcination/reduction temperature and, thereby, to the formation of corresponding crystallite structure.

Last updated on 2019-13-11 at 02:40