Valorisation of bio-oil resulting from fast pyrolysis of wood

✍ Scribed by Vanderauwera, Paul F. L. P.; Wambeke, Dorine M. C.

• Book ID: 121562204
• Publisher: Versita
• Year: 2014
• Tongue: English
• Weight: 281 KB
• Volume: 68
• Category: Article
• ISSN: 0366-6352
• DOI: 10.2478/s11696-014-0541-y

✦ Synopsis

Abstract

Bio-oil resulting from the pyrolysis of lignocellulose is a complex mixture of polar low molecular mass oxygenated compounds of various functionalities and non-polar high molecular mass lignin derivatives. Several approaches to the upgrading of bio-oil are currently in progress. This study investigates the valorisation of crude bio-oil using physical and chemical methods. The effects of methanol addition on some properties of the bio-oil are investigated. Stable bio-oil/diesel oil emulsions are produced by the addition of surfactants with a hydrophilic-lipophilic balance value of 5–6. An alternative approach towards the upgrading of bio-oil is the hydrotreatment of the water-soluble fraction of bio-oil. Two-stage hydroprocessing with noble-metal catalysts Ru/C and Pt/C increases the intrinsic hydrogen content of the water-soluble fraction. The results show that the thermally unstable components including sugars, ketones and aldehydes are readily converted to diols and alcohols at pressures of 5 MPa. These observations can be explained by a set of reaction pathways for the compounds identified.