Effect of biomass ash addition on coal ash fusion process under CO2 atmosphere
| Autor: | Zi-bing Zhao, Min-min Feng, Yuhong Qin, Jie Feng, Wen-Ying Li, Stanislav V. Vassilev, Christina G. Vassileva |
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| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
Biomass ash Fusion Chemistry Scanning electron microscope 020209 energy General Chemical Engineering Organic Chemistry Metallurgy technology industry and agriculture Anthracite Energy Engineering and Power Technology Sintering 02 engineering and technology respiratory system musculoskeletal system complex mixtures Atmosphere Fuel Technology 020401 chemical engineering Scientific method Fly ash 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering |
| Zdroj: | Fuel. 231:417-426 |
| ISSN: | 0016-2361 |
| Popis: | The ash fusion process of Jincheng anthracite ash, rice straw ash and coal-biomass ashes with different rice straw ash addition ratios during co-gasification under CO2 atmosphere was elucidated by the ash fusion test, chemical analyses, optical heating stage microscopy (OHSM), X-ray diffraction and scanning electron microscopy equipped with energy-dispersive X-ray analyzer. Results showed that the initial sintering and initial melting temperatures of coal-biomass ashes observed by OHSM decreased with the addition of rice straw ash. The deformation temperatures determined by the ash fusion test were close to the initial melting temperatures. The biomass ash addition to coal ash introduced excessive amounts of alkaline compounds in the ash mixtures that led to lower initial temperatures of liquid phase formation. The ash fusion behavior of coal-biomass ashes with a rice straw ash addition ≤3 wt% was similar to that of coal ash and fits to the “softening-melting” ash fusion mechanism. In contrast, the ash fusion behavior of coal-biomass ashes with a greater addition of rice straw ash (>3 wt%) experienced dramatic changes at lower temperature and fits to the ‘‘melting-dissolution’’ ash fusion mechanism. |
| Databáze: | OpenAIRE |
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