Upgrading of Pyrolysis Oils by Hydrotreatment

Abstract

Bio-oil can be produced by high-pressure, low-temperature liquefaction in a liquid-solid phase system or by moderate-temperature pyrolysis in a gas-solid phase system at ambient pressure. Both processes give an oxygenated product. While this liquid can be utilised directly in some applications, stabilisation or upgrading is needed to produce material that is compatible with conventional hydrocarbon fuels and can be used in applications based on these fuels. This chapter describes the technology and status of hydrotreating-one of the technologies being developed for upgrading.