Comparison between physical properties and chemical composition of bio-oils derived from lignocellulose and triglyceride sources

Biomass can be used in the production of alternative liquid fuels and other chemicals through the pyrolysis process. The types of biomass used to obtain bio-oils can be divided into two main groups: lignocelluloses (LCs) and triacylglycerols (TAGs). However, although the liquid fraction obtained from the pyrolysis of these biomasses has different physical and chemical properties, the distinction between them is not yet clear in the literature. In this context, the main goal of this paper is to provide a summary of several research studies dealing with the measurement of the physicochemical properties of a range of bio-oils obtained from biomass based on lignocellulose and triglyceride sources. The aim is to shed light on the main differences between these two types of bio-oil in order to highlight their most appropriate applications as fuels or chemical precursors, by providing a comprehensive review on their physical and chemical properties.