The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion
The effect of low-frequency ultrasound on the treatment of birch sawdust with hot water and diluted acid was studied for the first time under high pressure and temperature. When treated with diluted formic acid solution, the production of furfural dramatically increased, emphasizing the straightforw...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-05-01
|
| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417725000975 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849761254813466624 |
|---|---|
| author | Salla Kälkäjä Tao Hu Stéphane Baup Jean-Marc Lévêque Katja Lappalainen |
| author_facet | Salla Kälkäjä Tao Hu Stéphane Baup Jean-Marc Lévêque Katja Lappalainen |
| author_sort | Salla Kälkäjä |
| collection | DOAJ |
| description | The effect of low-frequency ultrasound on the treatment of birch sawdust with hot water and diluted acid was studied for the first time under high pressure and temperature. When treated with diluted formic acid solution, the production of furfural dramatically increased, emphasizing the straightforward hydrolysis of hemicellulose. The highest furfural yield (43–44 %) was achieved with 5 % formic acid. The most significant decrease in crystallinity index (from 56 % to 50 %) compared to treatment without ultrasound was observed with 2.5 % formic acid, using a 70:30 pulse mode with 70 % amplitude of the nominal power deliverable by the generator and an additional pressure of 3 bar. In diluted acid experiments, the remaining solid fraction, which presumably contained mainly cellulose and lignin, exhibited a completely different shape compared to the starting material, resulting in a kind of “wooden paste” with reduced particle size. The impact of additional pressure appeared to be significant, and this is further discussed in relation to the determination of the acoustic power under such rigorous experimental conditions. Based on the results obtained, ultrasound combined with hot water / diluted acid treatment shows potential for the efficient utilization of birch sawdust for platform chemicals. |
| format | Article |
| id | doaj-art-78059daa997e43468f3f047109fd59ba |
| institution | DOAJ |
| issn | 1350-4177 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj-art-78059daa997e43468f3f047109fd59ba2025-08-20T03:06:05ZengElsevierUltrasonics Sonochemistry1350-41772025-05-0111610731810.1016/j.ultsonch.2025.107318The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversionSalla Kälkäjä0Tao Hu1Stéphane Baup2Jean-Marc Lévêque3Katja Lappalainen4Sustainable Chemistry Research Unit, University of Oulu, P.O. Box 4300, FIN-90014 Oulu, FinlandSustainable Chemistry Research Unit, University of Oulu, P.O. Box 4300, FIN-90014 Oulu, FinlandUniversité Grenoble Alpes, CNRS, Grenoble INP, LRP, 38000 Grenoble, FranceUniversité Grenoble Alpes, CNRS, Grenoble INP, LRP, 38000 Grenoble, FranceSustainable Chemistry Research Unit, University of Oulu, P.O. Box 4300, FIN-90014 Oulu, Finland; Corresponding author.The effect of low-frequency ultrasound on the treatment of birch sawdust with hot water and diluted acid was studied for the first time under high pressure and temperature. When treated with diluted formic acid solution, the production of furfural dramatically increased, emphasizing the straightforward hydrolysis of hemicellulose. The highest furfural yield (43–44 %) was achieved with 5 % formic acid. The most significant decrease in crystallinity index (from 56 % to 50 %) compared to treatment without ultrasound was observed with 2.5 % formic acid, using a 70:30 pulse mode with 70 % amplitude of the nominal power deliverable by the generator and an additional pressure of 3 bar. In diluted acid experiments, the remaining solid fraction, which presumably contained mainly cellulose and lignin, exhibited a completely different shape compared to the starting material, resulting in a kind of “wooden paste” with reduced particle size. The impact of additional pressure appeared to be significant, and this is further discussed in relation to the determination of the acoustic power under such rigorous experimental conditions. Based on the results obtained, ultrasound combined with hot water / diluted acid treatment shows potential for the efficient utilization of birch sawdust for platform chemicals.http://www.sciencedirect.com/science/article/pii/S1350417725000975Birch sawdustFurfuralLignocellulosic side streamUltrasound assisted hydrolysis |
| spellingShingle | Salla Kälkäjä Tao Hu Stéphane Baup Jean-Marc Lévêque Katja Lappalainen The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion Ultrasonics Sonochemistry Birch sawdust Furfural Lignocellulosic side stream Ultrasound assisted hydrolysis |
| title | The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion |
| title_full | The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion |
| title_fullStr | The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion |
| title_full_unstemmed | The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion |
| title_short | The effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose’s chemical conversion |
| title_sort | effect of ultrasound on birch sawdust during simultaneous pretreatment and hemicellulose s chemical conversion |
| topic | Birch sawdust Furfural Lignocellulosic side stream Ultrasound assisted hydrolysis |
| url | http://www.sciencedirect.com/science/article/pii/S1350417725000975 |
| work_keys_str_mv | AT sallakalkaja theeffectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT taohu theeffectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT stephanebaup theeffectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT jeanmarcleveque theeffectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT katjalappalainen theeffectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT sallakalkaja effectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT taohu effectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT stephanebaup effectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT jeanmarcleveque effectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion AT katjalappalainen effectofultrasoundonbirchsawdustduringsimultaneouspretreatmentandhemicelluloseschemicalconversion |