Molecular weight distribution of raw and catalytic fast pyrolysis oils: comparison of analytical methodologies
Abstract
Comprehensive analysis of the molecular weight distribution of raw and catalytic fast pyrolysis oils derived from biomass remains a key technical hurdle to understanding oil quality as it relates to downstream use and multiple methods may be necessary to accurately represent all components present. Here, we report the molecular weight distribution metrics of fast pyrolysis (FP) and catalytic fast pyrolysis (CFP) oils as determined by gel permeation chromatography (GPC) combined with UV-diode array (UV), differential refractive index (RI), and multi-angle laser light scattering (MALS) detection. The measured molar mass distributions revealed that FP oil consisted of a higher proportion of larger products relative to the low molecular weight products contained in the CFP oil. GPC/RI and UV methods showed FP oil to have higher weight-average molecular weight (Mw) and number-average molecular weight (Mn) than CFP oil based on elution time. However, GPC/MALS, determined the two oils to have similar overall molecular weight distribution metrics (Mw and Mn) and yielded values significantly higher than those determined by RI and UV detectors relative to external standards. Overall, the use of a multiple detection GPC method could enable a more accurate comparison and determination of true molecular weight metrics of bio-oils.
- Authors:
-
[2]
- Biosciences Center, National Renewable Energy Laboratory, Golden, USA
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, USA
- Wyatt Technology Corporation, Goleta, USA
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office; USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1593173
- Alternate Identifier(s):
- OSTI ID: 1598125
- Report Number(s):
- NREL/JA-5100-75507
Journal ID: ISSN 2046-2069; RSCACL
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Published Article
- Journal Name:
- RSC Advances
- Additional Journal Information:
- Journal Name: RSC Advances Journal Volume: 10 Journal Issue: 7; Journal ID: ISSN 2046-2069
- Publisher:
- Royal Society of Chemistry (RSC)
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; pyrolysis; catalysis; molecular weight; gel permeation chromatography; light 12 scattering; CCTPL
Citation Formats
Harman-Ware, Anne E., Orton, Kellene, Deng, Chris, Kenrick, Sophia, Carpenter, Daniel, and Ferrell, Jack R. Molecular weight distribution of raw and catalytic fast pyrolysis oils: comparison of analytical methodologies. United Kingdom: N. p., 2020.
Web. doi:10.1039/C9RA09726K.
Harman-Ware, Anne E., Orton, Kellene, Deng, Chris, Kenrick, Sophia, Carpenter, Daniel, & Ferrell, Jack R. Molecular weight distribution of raw and catalytic fast pyrolysis oils: comparison of analytical methodologies. United Kingdom. https://doi.org/10.1039/C9RA09726K
Harman-Ware, Anne E., Orton, Kellene, Deng, Chris, Kenrick, Sophia, Carpenter, Daniel, and Ferrell, Jack R. Wed .
"Molecular weight distribution of raw and catalytic fast pyrolysis oils: comparison of analytical methodologies". United Kingdom. https://doi.org/10.1039/C9RA09726K.
@article{osti_1593173,
title = {Molecular weight distribution of raw and catalytic fast pyrolysis oils: comparison of analytical methodologies},
author = {Harman-Ware, Anne E. and Orton, Kellene and Deng, Chris and Kenrick, Sophia and Carpenter, Daniel and Ferrell, Jack R.},
abstractNote = {Comprehensive analysis of the molecular weight distribution of raw and catalytic fast pyrolysis oils derived from biomass remains a key technical hurdle to understanding oil quality as it relates to downstream use and multiple methods may be necessary to accurately represent all components present. Here, we report the molecular weight distribution metrics of fast pyrolysis (FP) and catalytic fast pyrolysis (CFP) oils as determined by gel permeation chromatography (GPC) combined with UV-diode array (UV), differential refractive index (RI), and multi-angle laser light scattering (MALS) detection. The measured molar mass distributions revealed that FP oil consisted of a higher proportion of larger products relative to the low molecular weight products contained in the CFP oil. GPC/RI and UV methods showed FP oil to have higher weight-average molecular weight (Mw) and number-average molecular weight (Mn) than CFP oil based on elution time. However, GPC/MALS, determined the two oils to have similar overall molecular weight distribution metrics (Mw and Mn) and yielded values significantly higher than those determined by RI and UV detectors relative to external standards. Overall, the use of a multiple detection GPC method could enable a more accurate comparison and determination of true molecular weight metrics of bio-oils.},
doi = {10.1039/C9RA09726K},
journal = {RSC Advances},
number = 7,
volume = 10,
place = {United Kingdom},
year = {Wed Jan 22 00:00:00 EST 2020},
month = {Wed Jan 22 00:00:00 EST 2020}
}
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https://doi.org/10.1039/C9RA09726K
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