AUTHOR=Lyu Gaojin , Wu Shubin , Zhang Hongdan TITLE=Estimation and Comparison of Bio-Oil Components from Different Pyrolysis Conditions JOURNAL=Frontiers in Energy Research VOLUME=3 YEAR=2015 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2015.00028 DOI=10.3389/fenrg.2015.00028 ISSN=2296-598X ABSTRACT=

In the case of development and utilization of bio-oils, a quantitative chemical ­characterization is necessary to evaluate its actual desired characteristics for downstream production. This paper describes an analytical approach for the determination of families of lightweight chemicals from bio-oils by using GC-MS techniques. And on this basis, new explorations in the field of influence factors, such as feedstocks, pyrolysis temperatures, and low-temperature pretreatment, on the composition and products yields of bio-oil were further investigated. Up to 40% (wt.%) of the bio-oil is successfully quantified by the current method. Chemical functionalities in the bio-oil correlate strongly with the original feedstocks because of their different chemical compositions and structure. Pyrolysis temperature plays a vital role in the yields of value-added compounds, both overall and individually. Higher temperature favored the generation of small aldehydes and acids, accompanied by a reduction of phenols. The optimal temperatures for maximum furans and ketones yields were 520 and 550°C, respectively. The low-temperature pretreatment of biomass has a good enrichment for the lightweight components of the bio-oils. In this case, much higher amounts of compounds, such as furans, ketones, and phenols were produced. Such a determination would contribute greatly to a deeper understanding of the chemical efficiency of the pyrolysis reaction and how the bio-oils could be more properly utilized.