Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration
In this study a non-aqueous potentiometric titration method has been developed to quantify the carboxylic acids and phenolics in bio-oil. Quarternary ammonium hydroxide was used as the titrant and a mixture of tert-butanol and acetone was used as the solvent to differentiate the acidic components wi...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Ltd
2013
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/15355 |
| _version_ | 1848748870844022784 |
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| author | Wu, Liping Hu, Xun Mourant, D. Wang, Y. Kelly, Cyril Garcia-Perez, M. He, M. Li, Chun-Zhu |
| author_facet | Wu, Liping Hu, Xun Mourant, D. Wang, Y. Kelly, Cyril Garcia-Perez, M. He, M. Li, Chun-Zhu |
| author_sort | Wu, Liping |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this study a non-aqueous potentiometric titration method has been developed to quantify the carboxylic acids and phenolics in bio-oil. Quarternary ammonium hydroxide was used as the titrant and a mixture of tert-butanol and acetone was used as the solvent to differentiate the acidic components with distinct acidities. The heavy carboxylic acids, which cannot be identified with GC–MS, account for ca. 29–45% (mol basis) of all the carboxylic acids in the bio-oil from mallee wood. In addition, both the heavy and light phenolic components could be identified with the titration method developed, while GC–MS can only identify some light phenolic compounds (3% mol basis). The titration method was further applied to the determination of the concentrations of acidic components in the bio-oils from mallee wood, bark and leaves. The pyrolysis of mallee wood produced the highest yields of acidic components while that of leaves produce the lowest. The successful development of the titration method for quantification of these heavy carboxylic acids and phenolics provides useful information for the further upgrading of bio-oil. |
| first_indexed | 2025-11-14T07:11:55Z |
| format | Journal Article |
| id | curtin-20.500.11937-15355 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:11:55Z |
| publishDate | 2013 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-153552017-09-13T13:40:19Z Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration Wu, Liping Hu, Xun Mourant, D. Wang, Y. Kelly, Cyril Garcia-Perez, M. He, M. Li, Chun-Zhu bio-oil phenolic compound total acidic compounds carboxylic acid potentiometric titration In this study a non-aqueous potentiometric titration method has been developed to quantify the carboxylic acids and phenolics in bio-oil. Quarternary ammonium hydroxide was used as the titrant and a mixture of tert-butanol and acetone was used as the solvent to differentiate the acidic components with distinct acidities. The heavy carboxylic acids, which cannot be identified with GC–MS, account for ca. 29–45% (mol basis) of all the carboxylic acids in the bio-oil from mallee wood. In addition, both the heavy and light phenolic components could be identified with the titration method developed, while GC–MS can only identify some light phenolic compounds (3% mol basis). The titration method was further applied to the determination of the concentrations of acidic components in the bio-oils from mallee wood, bark and leaves. The pyrolysis of mallee wood produced the highest yields of acidic components while that of leaves produce the lowest. The successful development of the titration method for quantification of these heavy carboxylic acids and phenolics provides useful information for the further upgrading of bio-oil. 2013 Journal Article http://hdl.handle.net/20.500.11937/15355 10.1016/j.fuel.2013.07.092 Elsevier Ltd restricted |
| spellingShingle | bio-oil phenolic compound total acidic compounds carboxylic acid potentiometric titration Wu, Liping Hu, Xun Mourant, D. Wang, Y. Kelly, Cyril Garcia-Perez, M. He, M. Li, Chun-Zhu Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| title | Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| title_full | Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| title_fullStr | Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| title_full_unstemmed | Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| title_short | Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| title_sort | quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration |
| topic | bio-oil phenolic compound total acidic compounds carboxylic acid potentiometric titration |
| url | http://hdl.handle.net/20.500.11937/15355 |