Effect of hydrothermal carbonization temperature on fuel properties and combustion behavior of high-ash corn and rice straw hydrochar
| Autor: | Zifeng Sui, Jie Wu, Jiawei Wang, Yutong Cao, Qihao Wang, Weipeng Chen |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Thermal Science. :186-186 |
| ISSN: | 2334-7163 0354-9836 |
| Popis: | Hydrothermal carbonization (HTC) has been proven to improve the fuel properties of low-ash straw biomass. To explore the effect of HTC on high-ash straw biomass, the fuel properties and combustion behavior of hydrochar prepared by high-ash rice straw and corn straw at different temperature were studied. The results showed that increased reaction temperature could improve the C content, fixed carbon, heating value and fuel ratios (FC/VM) in high-ash straw hydrochars, which is similar to the change trend of low-ash biomass. The hydrochar prepared at 260?C has similar H/C and O/C atomic ratios and FC/VM to lignite. In addition, the highest energetic recovery efficiency is obtained at 200?C. While at 180?C, the comprehensive combustion characteristic index of the hydrochar is the best, which is 5.04?10-11 (min-2?K-3) and 6.42?10-11 (min-2?K-3). In addition, the C content in the hydrochars at 180?C was lower than the raw material, and the ash content increases with the reaction temperature, which is quite different from the low-ash biomass. In conclusion, the HTC could improve the fuel quality of high-ash straw, while its ash content remains at a high level. |
| Databáze: | OpenAIRE |
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