Staged thermal fractionation for segregation of lignin and cellulose pyrolysis products: An experimental study of residence time and temperature effects
Abstract
Thermal conversion technologies may be the most efficient means of production of transportation fuels from lignocellulosic biomass. In order to increase the viability and improve the carbon emissions profile of pyrolysis biofuels, improvements must be made to the required catalytic upgrading to increase both hydrogen utilization efficiency and final liquid carbon yields. However, no current single catalytic valorization strategy can be optimized to convert the complex mixture of compounds produced upon fast pyrolysis of biomass. Staged thermal fractionation, which entails a series of sequentially increasing temperature steps to decompose biomass, has been proposed as a simple means to create vapor product streams of enhanced purity as compared to fast pyrolysis. In this work, we use analytical pyrolysis to investigate the effects of time and temperature on a thermal step designed to segregate the lignin and cellulose pyrolysis products of a biomass which has been pre-torrefied to remove hemicellulose. At process conditions of 380 °C and 180 s isothermal hold time, a stream containing less than 20% phenolics (carbon basis) was produced, and upon subsequent fast pyrolysis of the residual solid a stream of 81.5% levoglucosan (carbon basis) was produced. The thermal segregation comes at the expense of vapor product carbonmore »
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Oklahoma, Norman, OK (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office
- OSTI Identifier:
- 1576635
- Alternate Identifier(s):
- OSTI ID: 1425152
- Grant/Contract Number:
- EE0006287
- Resource Type:
- Published Article
- Journal Name:
- Journal of Analytical and Applied Pyrolysis
- Additional Journal Information:
- Journal Name: Journal of Analytical and Applied Pyrolysis Journal Volume: 126 Journal Issue: C; Journal ID: ISSN 0165-2370
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; biomass; pyrolysis; torrefaction; catalysis; separations
Citation Formats
Waters, Christopher L., Janupala, Rajiv R., Mallinson, Richard G., and Lobban, Lance L. Staged thermal fractionation for segregation of lignin and cellulose pyrolysis products: An experimental study of residence time and temperature effects. Netherlands: N. p., 2017.
Web. doi:10.1016/j.jaap.2017.05.008.
Waters, Christopher L., Janupala, Rajiv R., Mallinson, Richard G., & Lobban, Lance L. Staged thermal fractionation for segregation of lignin and cellulose pyrolysis products: An experimental study of residence time and temperature effects. Netherlands. https://doi.org/10.1016/j.jaap.2017.05.008
Waters, Christopher L., Janupala, Rajiv R., Mallinson, Richard G., and Lobban, Lance L. Sat .
"Staged thermal fractionation for segregation of lignin and cellulose pyrolysis products: An experimental study of residence time and temperature effects". Netherlands. https://doi.org/10.1016/j.jaap.2017.05.008.
@article{osti_1576635,
title = {Staged thermal fractionation for segregation of lignin and cellulose pyrolysis products: An experimental study of residence time and temperature effects},
author = {Waters, Christopher L. and Janupala, Rajiv R. and Mallinson, Richard G. and Lobban, Lance L.},
abstractNote = {Thermal conversion technologies may be the most efficient means of production of transportation fuels from lignocellulosic biomass. In order to increase the viability and improve the carbon emissions profile of pyrolysis biofuels, improvements must be made to the required catalytic upgrading to increase both hydrogen utilization efficiency and final liquid carbon yields. However, no current single catalytic valorization strategy can be optimized to convert the complex mixture of compounds produced upon fast pyrolysis of biomass. Staged thermal fractionation, which entails a series of sequentially increasing temperature steps to decompose biomass, has been proposed as a simple means to create vapor product streams of enhanced purity as compared to fast pyrolysis. In this work, we use analytical pyrolysis to investigate the effects of time and temperature on a thermal step designed to segregate the lignin and cellulose pyrolysis products of a biomass which has been pre-torrefied to remove hemicellulose. At process conditions of 380 °C and 180 s isothermal hold time, a stream containing less than 20% phenolics (carbon basis) was produced, and upon subsequent fast pyrolysis of the residual solid a stream of 81.5% levoglucosan (carbon basis) was produced. The thermal segregation comes at the expense of vapor product carbon yield, but the improvement in catalytic performance may offset these losses.},
doi = {10.1016/j.jaap.2017.05.008},
journal = {Journal of Analytical and Applied Pyrolysis},
number = C,
volume = 126,
place = {Netherlands},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}
https://doi.org/10.1016/j.jaap.2017.05.008
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