Study of levoglucosenone obtained in analytical pyrolysis and screw-type reactor, separation and distillation

Abstract

This research is dedicated to the study on the formation of levoglucosenone and other main volatiles from the catalytic pyrolysis with the addition of phosphoric acid of birch wood and lignocelluloses obtained by birch wood hydrothermal treatment. Py-GC/MS/FID method was used to evaluate the contents of the main products. Lignocelluloses were found to be a more promising precursor to obtain levoglucosenone with lesser content of furfural: For birch wood and lignocelluloses hydrothermally treated at 150 and 180 °C, Py-GC/MS/FID revealed levoglucosenone yields of 12.83, 16.94 and 21.08%, correspondingly (at 5% phosphoric acid addition). When birch wood impregnated with 5% H 3 PO 4 was pyrolized in the laboratory screw-type reactor, the levoglucosenone yield was 6.5%. The composition and content of volatiles formed in analytical pyrolysis, bio-oil and its chloroform extract were compared. Extraction of bio-oil with chloroform and consequent distillation resulted in fractions containing 79.14% of levoglucosenone.

Thermochemical Conversion of Untreated and Pretreated Biomass for Efficient Production of Levoglucosenone and 5-Chloromethylfurfural in the Presence of an Acid Catalyst

“…Softwood biomass also followed the same trend Furfural and HMF were co-products of the bio-oil, along with anhydrosugar, LGO, and other compounds. LGO, as well as furfural, HMF, LGA, and other undesirable compounds, were produced by phosphoric acid impregnation followed by hydrothermal processing [9]. Furanic platform chemicals such as furfural and HMF are seen as more environmentally friendly alternatives to petrochemicals.…”

“…Unfortunately, this is outside the scope of this research. LGO using GC-MS analysis [9]. The conversion of birch wood for the synthesis of LGO was carried out using a screw-type pyrolysis reactor.…”

“…Much research has been conducted to determine the feasibility of producing platform chemicals from cellulose, untreated, and pretreated biomass (e.g., LGO, furfural, levulinic acid, etc.) [8][9][10][11]. The literature discusses the pretreatment of biomass to remove lignin and hemicellulose prior to thermal conversion, which increases LGO production [11,12].…”

“…However, none of the literature examined the generation of platform chemicals in a fluidized bed reactor using peracetic acid (PAA)-treated delignified biomass. The literature discusses the pretreatment of biomass to remove lignin and hemicellulose before thermal conversion, which results in an increase in LGO production [9].…”

Optimization of microwave-assisted hydrothermal pretreatment and its effect on pyrolytic oil quality obtained by an auger reactor

“…Levoglucosan has a commercial price, according to Sigma-Aldrich, of USD 110 g -1 and it is commonly used for the synthesis of high-value compounds and materials (esters, films, binders, UV polymers, and singular drugs) (Ermolenko, 2013). Recent studies have demonstrated the feasibility of extraction and subsequent distillation of levoglucosan from pyrolytic oil (Wang et al, 2016;Dobele et al, 2020). Hence, it is recommended to deepen in this subject, for optimization of levoglucosan production using pyrolysis plant at pilot level.…”