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Title: Performance and Emissions Control of Commercial-Scale Biochar Production Unit

Abstract

<italic>Abstract.</italic> Two commercial biochar production machines – a single-auger unit and a larger dual-auger version – were operated to evaluate feedstock specifications, biochar quality, throughput rates, and emissions profiles. Biochar was produced from woody biomass feedstocks of various species, contamination levels, comminution methods, and moisture contents. Feedstocks with ash content exceeding 15% dry basis or moisture content exceeding 25% wet basis were observed to decrease fixed carbon content of biochar and to increase the labor effort required to operate the machine. The dual-auger version of the machine was able to process 380 kg h -1of biomass feedstock (dry basis) to produce 63 kg h -1of biochar with a mean electricity demand of 4.5 kW. Average CO, propane, NO x, and SO 2emission rates from the flare of this machine were measured to be 160, 120, 51, and 43 g h -1, respectively, with total particulate matter (PM), PM 10, and PM 2.5emission rates of 380, 40, and 4.5 g h -1, respectively. Results from these experiments indicate that high-quality biochar can be produced from a variety of feedstocks, including forest residuals, as long as the ash and moisture content are within the specifications. Future research and development should focus onmore » increasing the throughput of the machine, implementing an automated control system to reduce the operational effort, and improving safety and product consistency. Keywords: Biochar, Biomass, Biomass conversion technology, Carbon sequestration, Forest residuals, Gasification, Pyrolysis.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Humboldt State Univ., Arcata, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1541892
DOE Contract Number:  
EE0006297
Resource Type:
Journal Article
Journal Name:
Applied Engineering in Agriculture
Additional Journal Information:
Journal Volume: 34; Journal Issue: 1; Journal ID: ISSN 1943-7838
Publisher:
American Society of Agricultural and Biological Engineers
Country of Publication:
United States
Language:
English
Subject:
Agriculture

Citation Formats

Severy, Mark A., Carter, David J., Palmer, Kyle D., Eggink, Anthony J., Chamberlin, Charles E., and Jacobson, Arne E. Performance and Emissions Control of Commercial-Scale Biochar Production Unit. United States: N. p., 2018. Web. doi:10.13031/aea.12375.
Severy, Mark A., Carter, David J., Palmer, Kyle D., Eggink, Anthony J., Chamberlin, Charles E., & Jacobson, Arne E. Performance and Emissions Control of Commercial-Scale Biochar Production Unit. United States. doi:10.13031/aea.12375.
Severy, Mark A., Carter, David J., Palmer, Kyle D., Eggink, Anthony J., Chamberlin, Charles E., and Jacobson, Arne E. Mon . "Performance and Emissions Control of Commercial-Scale Biochar Production Unit". United States. doi:10.13031/aea.12375.
@article{osti_1541892,
title = {Performance and Emissions Control of Commercial-Scale Biochar Production Unit},
author = {Severy, Mark A. and Carter, David J. and Palmer, Kyle D. and Eggink, Anthony J. and Chamberlin, Charles E. and Jacobson, Arne E.},
abstractNote = {<italic>Abstract.</italic> Two commercial biochar production machines – a single-auger unit and a larger dual-auger version – were operated to evaluate feedstock specifications, biochar quality, throughput rates, and emissions profiles. Biochar was produced from woody biomass feedstocks of various species, contamination levels, comminution methods, and moisture contents. Feedstocks with ash content exceeding 15% dry basis or moisture content exceeding 25% wet basis were observed to decrease fixed carbon content of biochar and to increase the labor effort required to operate the machine. The dual-auger version of the machine was able to process 380 kg h-1of biomass feedstock (dry basis) to produce 63 kg h-1of biochar with a mean electricity demand of 4.5 kW. Average CO, propane, NOx, and SO2emission rates from the flare of this machine were measured to be 160, 120, 51, and 43 g h-1, respectively, with total particulate matter (PM), PM10, and PM2.5emission rates of 380, 40, and 4.5 g h-1, respectively. Results from these experiments indicate that high-quality biochar can be produced from a variety of feedstocks, including forest residuals, as long as the ash and moisture content are within the specifications. Future research and development should focus on increasing the throughput of the machine, implementing an automated control system to reduce the operational effort, and improving safety and product consistency. Keywords: Biochar, Biomass, Biomass conversion technology, Carbon sequestration, Forest residuals, Gasification, Pyrolysis.},
doi = {10.13031/aea.12375},
journal = {Applied Engineering in Agriculture},
issn = {1943-7838},
number = 1,
volume = 34,
place = {United States},
year = {2018},
month = {1}
}