Carbonic Acid Pretreatment of Biomass
This project sought to address six objectives, outlined below. The objectives were met through the completion of ten tasks. 1) Solidify the theoretical understanding of the binary CO2/H2O system at reaction temperatures and pressures. The thermodynamics of pH prediction have been improved to include...
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Bayor University
2003
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ftunivnotexas:info:ark/67531/metadc873607 2023-05-15T15:51:58+02:00 Carbonic Acid Pretreatment of Biomass Walsum, G. Peter van Jayawardhana, Kemantha Yourchisin, Damon McWilliams, Robert Castleberry, Vanessa United States. Department of Energy. United States. Department of Energy. Solar Thermal and Biomass Power Division. 2003-05-31 3.5 MB Text https://doi.org/10.2172/882226 https://digital.library.unt.edu/ark:/67531/metadc873607/ English eng Bayor University rep-no: DOE/GO/11070final grantno: FC36-01GO11070 doi:10.2172/882226 osti: 882226 https://digital.library.unt.edu/ark:/67531/metadc873607/ ark: ark:/67531/metadc873607 Biomass Forecasting Carbohydrates Titration Maize Thermodynamics Wood Biomass Pretreatment Carbonic Acid Inhibition Aspen-Plus Modeling Enzymatic Hydrolysis Production Economic Analysis Carbonates Water Sulfuric Acid Agricultural Wastes 09 Biomass Fuels Activation Energy Substrates Report 2003 ftunivnotexas https://doi.org/10.2172/882226 2023-03-04T23:08:06Z This project sought to address six objectives, outlined below. The objectives were met through the completion of ten tasks. 1) Solidify the theoretical understanding of the binary CO2/H2O system at reaction temperatures and pressures. The thermodynamics of pH prediction have been improved to include a more rigorous treatment of non-ideal gas phases. However it was found that experimental attempts to confirm theoretical pH predictions were still off by a factor of about 1.8 pH units. Arrhenius experiments were carried out and the activation energy for carbonic acid appears to be substantially similar to sulfuric acid. Titration experiments have not yet confirmed or quantified the buffering or acid suppression effects of carbonic acid on biomass. 2) Modify the carbonic acid pretreatment severity function to include the effect of endogenous acid formation and carbonate buffering, if necessary. It was found that the existing severity functions serve adequately to account for endogenous acid production and carbonate effects. 3) Quantify the production of soluble carbohydrates at different reaction conditions and severity. Results show that carbonic acid has little effect on increasing soluble carbohydrate concentrations for pretreated aspen wood, compared to pretreatment with water alone. This appears to be connected to the release of endogenous acids by the substrate. A less acidic substrate such as corn stover would derive benefit from the use of carbonic acid. 4) Quantify the production of microbial inhibitors at selected reaction conditions and severity. It was found that the release of inhibitors was correlated to reaction severity and that carbonic acid did not appear to increase or decrease inhibition compared to pretreatment with water alone. 5) Assess the reactivity to enzymatic hydrolysis of material pretreated at selected reaction conditions and severity. Enzymatic hydrolysis rates increased with severity, but no advantage was detected for the use of carbonic acid compared to water alone. 6) Determine ... Report Carbonic acid University of North Texas: UNT Digital Library |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Biomass Forecasting Carbohydrates Titration Maize Thermodynamics Wood Biomass Pretreatment Carbonic Acid Inhibition Aspen-Plus Modeling Enzymatic Hydrolysis Production Economic Analysis Carbonates Water Sulfuric Acid Agricultural Wastes 09 Biomass Fuels Activation Energy Substrates |
spellingShingle |
Biomass Forecasting Carbohydrates Titration Maize Thermodynamics Wood Biomass Pretreatment Carbonic Acid Inhibition Aspen-Plus Modeling Enzymatic Hydrolysis Production Economic Analysis Carbonates Water Sulfuric Acid Agricultural Wastes 09 Biomass Fuels Activation Energy Substrates Walsum, G. Peter van Jayawardhana, Kemantha Yourchisin, Damon McWilliams, Robert Castleberry, Vanessa Carbonic Acid Pretreatment of Biomass |
topic_facet |
Biomass Forecasting Carbohydrates Titration Maize Thermodynamics Wood Biomass Pretreatment Carbonic Acid Inhibition Aspen-Plus Modeling Enzymatic Hydrolysis Production Economic Analysis Carbonates Water Sulfuric Acid Agricultural Wastes 09 Biomass Fuels Activation Energy Substrates |
description |
This project sought to address six objectives, outlined below. The objectives were met through the completion of ten tasks. 1) Solidify the theoretical understanding of the binary CO2/H2O system at reaction temperatures and pressures. The thermodynamics of pH prediction have been improved to include a more rigorous treatment of non-ideal gas phases. However it was found that experimental attempts to confirm theoretical pH predictions were still off by a factor of about 1.8 pH units. Arrhenius experiments were carried out and the activation energy for carbonic acid appears to be substantially similar to sulfuric acid. Titration experiments have not yet confirmed or quantified the buffering or acid suppression effects of carbonic acid on biomass. 2) Modify the carbonic acid pretreatment severity function to include the effect of endogenous acid formation and carbonate buffering, if necessary. It was found that the existing severity functions serve adequately to account for endogenous acid production and carbonate effects. 3) Quantify the production of soluble carbohydrates at different reaction conditions and severity. Results show that carbonic acid has little effect on increasing soluble carbohydrate concentrations for pretreated aspen wood, compared to pretreatment with water alone. This appears to be connected to the release of endogenous acids by the substrate. A less acidic substrate such as corn stover would derive benefit from the use of carbonic acid. 4) Quantify the production of microbial inhibitors at selected reaction conditions and severity. It was found that the release of inhibitors was correlated to reaction severity and that carbonic acid did not appear to increase or decrease inhibition compared to pretreatment with water alone. 5) Assess the reactivity to enzymatic hydrolysis of material pretreated at selected reaction conditions and severity. Enzymatic hydrolysis rates increased with severity, but no advantage was detected for the use of carbonic acid compared to water alone. 6) Determine ... |
author2 |
United States. Department of Energy. United States. Department of Energy. Solar Thermal and Biomass Power Division. |
format |
Report |
author |
Walsum, G. Peter van Jayawardhana, Kemantha Yourchisin, Damon McWilliams, Robert Castleberry, Vanessa |
author_facet |
Walsum, G. Peter van Jayawardhana, Kemantha Yourchisin, Damon McWilliams, Robert Castleberry, Vanessa |
author_sort |
Walsum, G. Peter van |
title |
Carbonic Acid Pretreatment of Biomass |
title_short |
Carbonic Acid Pretreatment of Biomass |
title_full |
Carbonic Acid Pretreatment of Biomass |
title_fullStr |
Carbonic Acid Pretreatment of Biomass |
title_full_unstemmed |
Carbonic Acid Pretreatment of Biomass |
title_sort |
carbonic acid pretreatment of biomass |
publisher |
Bayor University |
publishDate |
2003 |
url |
https://doi.org/10.2172/882226 https://digital.library.unt.edu/ark:/67531/metadc873607/ |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
rep-no: DOE/GO/11070final grantno: FC36-01GO11070 doi:10.2172/882226 osti: 882226 https://digital.library.unt.edu/ark:/67531/metadc873607/ ark: ark:/67531/metadc873607 |
op_doi |
https://doi.org/10.2172/882226 |
_version_ |
1766387323570749440 |