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Title: Fast Pyrolysis Behavior of Banagrass as a Function of Temperature and Volatiles Residence Time in a Fluidized Bed Reactor

Abstract

A reactor was designed and commissioned to study the fast pyrolysis behavior of banagrass as a function of temperature and volatiles residence time. Four temperatures between 400 and 600°C were examined as well as four residence times between ~1.0 and 10 seconds. Pyrolysis product distributions of bio-oil, char and permanent gases were determined at each reaction condition. The elemental composition of the bio-oils and chars was also assessed. The greatest bio-oil yield was recorded when working at 450°C with a volatiles residence time of 1.4 s, ~37 wt% relative to the dry ash free feedstock (excluding pyrolysis water). The amounts of char (organic fraction) and permanent gases under these conditions are ~4 wt% and 8 wt% respectively. The bio-oil yield stated above is for 'dry' bio-oil after rotary evaporation to remove solvent, which results in volatiles and pyrolysis water being removed from the bio-oil. The material removed during drying accounts for the remainder of the pyrolysis products. The 'dry' bio-oil produced under these conditions contains ~56 wt% carbon which is ~40 wt% of the carbon present in the feedstock. The oxygen content of the 450°C, 1.4 s 'dry' bio-oil is ~38 wt%, which accounts for ~33 wt% of the oxygenmore » in the feedstock. At higher temperature or longer residence time less bio-oil and char is recovered and more gas and light volatiles are produced. Increasing the temperature has a more significant effect on product yields and composition than increasing the volatiles residence time. At 600°C and a volatiles residence time of 1.2 seconds the bio-oil yield is ~21 wt% of the daf feedstock, with a carbon content of 64 wt% of the bio-oil. The bio-oil yield from banagrass is significantly lower than from woody biomass or grasses such as switchgrass or miscanthus, but is similar to barley straw. In conclusion, the reason for the low bio-oil yield from banagrass is thought to be related to its high ash content (8.5 wt% dry basis) and high concentration of alkali and alkali earth metals (totaling ~2.8 wt% relative to the dry feedstock) which are catalytic and increase cracking reactions during pyrolysis.« less

Authors:
 [1];  [1];  [2]
  1. Univ. of Hawaii at Manoa, Honolulu, HI (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1261100
Grant/Contract Number:  
EE0003507
Resource Type:
Accepted Manuscript
Journal Name:
PLoS ONE
Additional Journal Information:
Journal Volume: 10; Journal Issue: 8; Journal ID: ISSN 1932-6203
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES

Citation Formats

Morgan, Trevor James, Turn, Scott Q., and George, Anthe. Fast Pyrolysis Behavior of Banagrass as a Function of Temperature and Volatiles Residence Time in a Fluidized Bed Reactor. United States: N. p., 2015. Web. doi:10.1371/journal.pone.0136511.
Morgan, Trevor James, Turn, Scott Q., & George, Anthe. Fast Pyrolysis Behavior of Banagrass as a Function of Temperature and Volatiles Residence Time in a Fluidized Bed Reactor. United States. https://doi.org/10.1371/journal.pone.0136511
Morgan, Trevor James, Turn, Scott Q., and George, Anthe. Wed . "Fast Pyrolysis Behavior of Banagrass as a Function of Temperature and Volatiles Residence Time in a Fluidized Bed Reactor". United States. https://doi.org/10.1371/journal.pone.0136511. https://www.osti.gov/servlets/purl/1261100.
@article{osti_1261100,
title = {Fast Pyrolysis Behavior of Banagrass as a Function of Temperature and Volatiles Residence Time in a Fluidized Bed Reactor},
author = {Morgan, Trevor James and Turn, Scott Q. and George, Anthe},
abstractNote = {A reactor was designed and commissioned to study the fast pyrolysis behavior of banagrass as a function of temperature and volatiles residence time. Four temperatures between 400 and 600°C were examined as well as four residence times between ~1.0 and 10 seconds. Pyrolysis product distributions of bio-oil, char and permanent gases were determined at each reaction condition. The elemental composition of the bio-oils and chars was also assessed. The greatest bio-oil yield was recorded when working at 450°C with a volatiles residence time of 1.4 s, ~37 wt% relative to the dry ash free feedstock (excluding pyrolysis water). The amounts of char (organic fraction) and permanent gases under these conditions are ~4 wt% and 8 wt% respectively. The bio-oil yield stated above is for 'dry' bio-oil after rotary evaporation to remove solvent, which results in volatiles and pyrolysis water being removed from the bio-oil. The material removed during drying accounts for the remainder of the pyrolysis products. The 'dry' bio-oil produced under these conditions contains ~56 wt% carbon which is ~40 wt% of the carbon present in the feedstock. The oxygen content of the 450°C, 1.4 s 'dry' bio-oil is ~38 wt%, which accounts for ~33 wt% of the oxygen in the feedstock. At higher temperature or longer residence time less bio-oil and char is recovered and more gas and light volatiles are produced. Increasing the temperature has a more significant effect on product yields and composition than increasing the volatiles residence time. At 600°C and a volatiles residence time of 1.2 seconds the bio-oil yield is ~21 wt% of the daf feedstock, with a carbon content of 64 wt% of the bio-oil. The bio-oil yield from banagrass is significantly lower than from woody biomass or grasses such as switchgrass or miscanthus, but is similar to barley straw. In conclusion, the reason for the low bio-oil yield from banagrass is thought to be related to its high ash content (8.5 wt% dry basis) and high concentration of alkali and alkali earth metals (totaling ~2.8 wt% relative to the dry feedstock) which are catalytic and increase cracking reactions during pyrolysis.},
doi = {10.1371/journal.pone.0136511},
journal = {PLoS ONE},
number = 8,
volume = 10,
place = {United States},
year = {Wed Aug 26 00:00:00 EDT 2015},
month = {Wed Aug 26 00:00:00 EDT 2015}
}

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Cited by: 21 works
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Works referenced in this record:

Optimizing biofuel production: An economic analysis for selected biofuel feedstock production in Hawaii
journal, May 2011


Banagrass vs Eucalyptus Wood as Feedstocks for Metallurgical Biocarbon Production
journal, December 2008

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Pyrolysis of Coals and Biomass: Analysis of Thermal Breakdown and Its Products
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A Kinetic Model for the Production of Liquids from the Flash Pyrolysis of Biomass
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The effect of lignin and inorganic species in biomass on pyrolysis oil yields, quality and stability
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Comparison of physicochemical features of biooils and biochars produced from various woody biomasses by fast pyrolysis
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Bench-Scale Fluidized-Bed Pyrolysis of Switchgrass for Bio-Oil Production
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An overview of the organic and inorganic phase composition of biomass
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A statistical analysis of the auto thermal fast pyrolysis of elephant grass in fluidized bed reactor based on produced charcoal
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journal, November 2008


Moderately high temperature pyrolysis of lignocellulose under vacuum conditions
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Pyrolysis kinetics of elephant grass pretreated biomasses
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Structural and Chemical Characterization of Hardwood from Tree Species with Applications as Bioenergy Feedstocks
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Pyrolysis of Wood/Biomass for Bio-oil: A Critical Review
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Characterization of biomass pyrolysis tars produced in the relative absence of extraparticle secondary reactions
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Bio-oil production by flash pyrolysis of sugarcane residues and post treatments of the aqueous phase
journal, May 2011


Pyrolytic Reactions of Lignin within Naturally Occurring Plant Matrices: Challenges in Biomass Pyrolysis Modeling Due to Synergistic Effects
journal, October 2014

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Synthesis of Transportation Fuels from Biomass: Chemistry, Catalysts, and Engineering
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Pyrolysis of solid fuels
book, January 2017


The flash pyrolysis of aspen-poplar wood
journal, October 1982

  • Scott, D. S.; Piskorz, J.
  • The Canadian Journal of Chemical Engineering, Vol. 60, Issue 5
  • DOI: 10.1002/cjce.5450600514

Pyrolysis kinetics of elephant grass pretreated biomasses
journal, June 2014

  • Braga, Renata M.; Costa, Tiago R.; Freitas, Julio C. O.
  • Journal of Thermal Analysis and Calorimetry, Vol. 117, Issue 3
  • DOI: 10.1007/s10973-014-3884-2

A statistical analysis of the auto thermal fast pyrolysis of elephant grass in fluidized bed reactor based on produced charcoal
journal, April 2014


Optimizing biofuel production: An economic analysis for selected biofuel feedstock production in Hawaii
journal, May 2011


Review of fast pyrolysis of biomass and product upgrading
journal, March 2012


Thermal conversion of elephant grass (Pennisetum Purpureum Schum) to bio-gas, bio-oil and charcoal
journal, November 2008


Characterization of bioresidues for biooil production through pyrolysis
journal, June 2013


Bio-oil production by flash pyrolysis of sugarcane residues and post treatments of the aqueous phase
journal, May 2011


Comparison of physicochemical features of biooils and biochars produced from various woody biomasses by fast pyrolysis
journal, February 2013


Pyrolysis of Coals and Biomass: Analysis of Thermal Breakdown and Its Products
journal, October 2013

  • Morgan, Trevor J.; Kandiyoti, Rafael
  • Chemical Reviews, Vol. 114, Issue 3
  • DOI: 10.1021/cr400194p

Pyrolysis of Wood/Biomass for Bio-oil: A Critical Review
journal, May 2006

  • Mohan, Dinesh; Pittman,, Charles U.; Steele, Philip H.
  • Energy & Fuels, Vol. 20, Issue 3, p. 848-889
  • DOI: 10.1021/ef0502397

Pyrolytic Reactions of Lignin within Naturally Occurring Plant Matrices: Challenges in Biomass Pyrolysis Modeling Due to Synergistic Effects
journal, October 2014

  • George, Anthe; Morgan, Trevor J.; Kandiyoti, Rafael
  • Energy & Fuels, Vol. 28, Issue 11
  • DOI: 10.1021/ef501459c

Fast Pyrolysis Bio-Oils from Wood and Agricultural Residues
journal, February 2010

  • Oasmaa, Anja; Solantausta, Yrjö; Arpiainen, Vesa
  • Energy & Fuels, Vol. 24, Issue 2
  • DOI: 10.1021/ef901107f

Additives To Lower and Stabilize the Viscosity of Pyrolysis Oils during Storage
journal, September 1997

  • Diebold, James P.; Czernik, Stefan
  • Energy & Fuels, Vol. 11, Issue 5
  • DOI: 10.1021/ef9700339

Fuel Oil Quality of Biomass Pyrolysis OilsState of the Art for the End Users
journal, July 1999

  • Oasmaa, Anja; Czernik, Stefan
  • Energy & Fuels, Vol. 13, Issue 4
  • DOI: 10.1021/ef980272b

Moderately high temperature pyrolysis of lignocellulose under vacuum conditions
journal, November 1988

  • Ekwenchi, Mbanefo M.; Araka, Benedict E.; Ekpenyong, Kieran I.
  • Industrial & Engineering Chemistry Research, Vol. 27, Issue 11
  • DOI: 10.1021/ie00083a036

Bench-Scale Fluidized-Bed Pyrolysis of Switchgrass for Bio-Oil Production
journal, March 2007

  • Boateng, Akwasi A.; Daugaard, Daren E.; Goldberg, Neil M.
  • Industrial & Engineering Chemistry Research, Vol. 46, Issue 7
  • DOI: 10.1021/ie0614529

Banagrass vs Eucalyptus Wood as Feedstocks for Metallurgical Biocarbon Production
journal, December 2008

  • Yoshida, Takuya; Turn, Scott Q.; Yost, Russell S.
  • Industrial & Engineering Chemistry Research, Vol. 47, Issue 24
  • DOI: 10.1021/ie801123a

A Kinetic Model for the Production of Liquids from the Flash Pyrolysis of Biomass
journal, March 1988

  • Liden, A. G.; Berruti, F.; Scott, D. S.
  • Chemical Engineering Communications, Vol. 65, Issue 1
  • DOI: 10.1080/00986448808940254

Structural and Chemical Characterization of Hardwood from Tree Species with Applications as Bioenergy Feedstocks
journal, December 2012


Rules of Thumb (Empirical Rules) for the Biomass Utilization by Thermochemical Conversion
journal, January 2014

  • ANTAL, Jr., Michael J.; Helsen, Lieve M.; Kouzu, Masato
  • Journal of the Japan Institute of Energy, Vol. 93, Issue 8
  • DOI: 10.3775/jie.93.684

Works referencing / citing this record:

Fast Pyrolysis of Tropical Biomass Species and Influence of Water Pretreatment on Product Distributions
journal, March 2016