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Thermo-Acoustic Catalytic Effect on Oxidizing Woody Torrefaction
| Content Provider | MDPI |
|---|---|
| Author | Luiz, Oliveira Galvão Isabella, Sá Silveira, Edgar Macedo, Lucélia Alves De Chaves, Bruno Morais, Marcus Girão De Rousset, Patrick Caldeira-Pires, Armando |
| Copyright Year | 2020 |
| Description | The torrefaction (mild pyrolysis) process modifies biomass chemical and physical properties and is applied as a thermochemical route to upgrade solid fuel. In this work, the catalytic effect of thermo-acoustic on oxidizing woody torrefaction is assessed. The combined effect of two acoustic frequencies (1411, 2696 Hz) and three temperatures (230, 250, and 290 °C) was evaluated through weight loss and its deviation curves, calculated torrefaction severity index (TSI), as well as proximate, calorific, and compression strength analysis of Eucalyptus grandis. A new index to account for the catalytic effects on torrefaction (TCEI) was introduced, providing the quantitative analysis of acoustic frequencies influence. A two-step consecutive reaction numerical model allowed the thermo-acoustic experiment evaluation. For instance, the thermogravimetric profiles revealed that the acoustic field has a catalytic effect on wood torrefaction and enhances the biomass oxidation process for severe treatments. The kinetic simulation of the acoustic coupling resulted in faster conversion rates for the solid pseudo-components showing the boosting effect of acoustic frequencies in anticipating hemicellulose decomposition and enhancing second step oxidizing reaction. |
| Starting Page | 1361 |
| e-ISSN | 22279717 |
| DOI | 10.3390/pr8111361 |
| Journal | Processes |
| Issue Number | 11 |
| Volume Number | 8 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-10-28 |
| Access Restriction | Open |
| Subject Keyword | Processes Paper and Wood Woody Biomass Torrefaction Thermoacoustic Catalytic Effect Numerical Modeling Severity Factors |
| Content Type | Text |
| Resource Type | Article |