Gasification kinetics of raw and wet-torrefied microalgae Chlorella vulgaris ESP-31 in carbon dioxide
| Autor: | Jo Shu Chang, Quang-Vu Bach, Herng Kuang Sheen, Wei Hsin Chen |
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| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Environmental Engineering 020209 energy Kinetics Chlorella vulgaris Biomass Bioengineering 02 engineering and technology chemistry.chemical_compound Microalgae 0202 electrical engineering electronic engineering information engineering Waste Management and Disposal Waste management Renewable Energy Sustainability and the Environment Chemistry Thermal decomposition General Medicine Carbon Dioxide Torrefaction Decomposition Chemical engineering Thermogravimetry Carbon dioxide |
| Zdroj: | Bioresource Technology. 244:1393-1399 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2017.03.153 |
| Popis: | This study aims at investigating the gasification behavior and kinetics of microalga Chlorella vulgaris ESP-31 before and after wet torrefaction. The raw and wet-torrefied microalgae were first gasified in a thermogravimetric analyzer under a continuous CO2 flow. Thereafter, the obtained thermogravimetric data were modeled for kinetic study, employing a seven-parallel-reaction mechanism. The decomposition of the microalgae in CO2 shows two reactive stages: devolatilization with two peaks and gasification with a peak accompanied by a shoulder, and the thermal decomposition of components in the samples can be clearly identified. Increasing wet torrefaction temperature lowers the height of the major devolatilization peak but enhances the height of the minor one. Moreover, the kinetic evaluation reveals that wet torrefaction affects most of the kinetic parameters of the microalgal components. Furthermore, wet torrefaction temperature influences the kinetic parameters of carbohydrate and lipid, but not on those of protein, "others", and chars. |
| Databáze: | OpenAIRE |
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