Estimation and Comparison of Bio-Oil Components from Different Pyrolysis Conditions

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.

Chemical Composition of Liquid Fuel Produced by Co-pyrolysis of Sugarcane Bagasse and Sludge Palm Oil Using Zeolite-Y as Catalyst

“…In another study 19 , pyrolysis of Nafier grass using ZSM-5, HZSM-5, and zinc exchanged zeolite-A was carried out and it was reported that hydrocarbon content of the liquid fuels is in the range of 25-30%. The existence of nonhydrocarbon as the main component, include acid, phenol, and aldehyde, has also been reported by other 20 . Other workers 21 also reported the presence of acids, ketones, phenols, and furans, as the dominating components of liquid fuels obtained by pyrolysis of white oak and sweet gum without using catalyst.…”

Production of Glucose from the Acid Hydrolysis of Anhydrosugars

“…temperature and residence time [6,9]. The major reported components of bio-oils include water, carboxylic acids, ketones, phenols, furans, and anhydrosugars [10,11].…”

Techno‐economic assessment of the effect of torrefaction on fast pyrolysis of pine

“…Examples of thermochemical conversion include pyrolysis, gasification, and liquefaction, all of which have great potential for producing biofuels from sources, such as lignocellulosic biomass, that have lower potential to compete with food sources compared to crop‐based biofuels such as corn ethanol . Fast pyrolysis of biomass is viewed as a very promising route to produce liquid fuels and as a result is now widely studied …”