Chemical characteristics of bio-oil from beech wood pyrolysis separated by fractional condensation and water extraction

Atmospheric Brown Carbon on the Tibetan Plateau: Regional Differences in Chemical Composition and Light Absorption Properties

“…■ RESULTS AND DISCUSSION For example, highly polar compounds may be relatively small molecules with multiple -OH and -COOH functional groups, while moderately/intermediately polar compounds may be larger molecules with carbonyl functionality, mostly like oxidized diterpenoids or oxidized lignin products. 39 The average total MAC 405 value of 0−60 min at QOMS (0.35 ± 0.10) was approximately 2 times higher than that at WLG (0.20 ± 0.08), which was mainly contributed by the higher MAC 405 values for the 0−3 and 3−30 min RT regions. The MAC 405 value of 30−60 min at WLG (0.09 ± 0.05) was significantly higher than that at QOMS (0.04 ± 0.02).…”

“…The ranges of RT used in this study are marked in Figure1and indicate highly polar (0−3 min), polar (3−30 min), and moderately/intermediately polar (30− 60 min) compounds on the basis of the relative absorption of broad classes of BrC components operationally defined for each of the RT ranges. For example, highly polar compounds may be relatively small molecules with multiple -OH and -COOH functional groups, while moderately/intermediately polar compounds may be larger molecules with carbonyl functionality, mostly like oxidized diterpenoids or oxidized lignin products 39. The average total MAC 405 value of 0−60 min at QOMS (0.35 ± 0.10) was approximately 2 times higher than that at WLG (0.20 ± 0.08), which was mainly contributed by the higher MAC 405 values for the 0−3 and 3−30 min RT regions.…”

Bio-Oil: The Next-Generation Source of Chemicals

“…Others managed to change pyrolysis-derived bio-oil composition through condensation parameters alone, decreasing water content and increasing phenol and furfural presence [128], or through the separation of bio-oil into different condensing temperature fractions, so-called fractional condensation [90,[160][161][162]. Fractional condensation allows for the separation of different chemically enriched fractions according to their vapor pressure [152], offering the possibility to efficiently utilize the entire biomass liquefaction condensate.…”

Study of green bio-oil-glyoxal novolac resins synthesis and its curing with bisphenol A diglycidyl ether and biochar

“…17 Bio-oil is a liquid complex mixture that contains over 400 different chemical compounds such as phenols. 18,19 However, the direct use of bio-oil as a source of phenol is limited due to the relatively low concentration of reactive sites; thus, an upgrading step is necessary. 17,[20][21][22][23][24] In our previous study, 19 the combination of fractional condensation and water extraction methods was used to successfully separate phenolic compounds from the beech wood pyrolytic bio-oil.…”

“…18,19 However, the direct use of bio-oil as a source of phenol is limited due to the relatively low concentration of reactive sites; thus, an upgrading step is necessary. 17,[20][21][22][23][24] In our previous study, 19 the combination of fractional condensation and water extraction methods was used to successfully separate phenolic compounds from the beech wood pyrolytic bio-oil. After a fractional condensation, the extraction of bio-oil by water was able to extract phenol into the water-insoluble fraction.…”