Blending effect of sewage sludge and woody biomass into coal on combustion and ash agglomeration behavior
| Autor: | Joeng-Geun Kim, Hueon Namkung, Young-Chan Choi, Gyu-Seob Song, Se-Joon Park, Jong Won Choi, Young Joo Lee, Ju-Hyoung Park |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Volatilisation
Fouling business.industry Economies of agglomeration 020209 energy General Chemical Engineering Organic Chemistry Energy Engineering and Power Technology Biomass 02 engineering and technology Combustion Pulp and paper industry Fuel Technology 020401 chemical engineering 0202 electrical engineering electronic engineering information engineering Environmental science Coal Char 0204 chemical engineering business Sludge |
| Zdroj: | Fuel. 225:266-276 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/j.fuel.2018.03.109 |
| Popis: | The co-combustion of sewage sludge and woody biomass is a key issue in coal power plants. Different combustion and ash behaviors of sewage sludge and woody biomass cause unpredictable operating concerns. In this study, the combustion and ash agglomeration behavior of blended fuel of sewage sludge and woody biomass (BSW) were investigated while coal co-combusted with it. Thermogravimetric analysis (TGA) revealed that adding a high amount of BSW into the coal lowered volatilization, ignition, and burn-out temperature. The char combustion reactivity of coal differed from that of BSW. The shrinking core model (SCM) and volumetric reaction model (VRM) were used to fit the char combustion reactivity of coal and BSW. In the case of ash agglomeration behavior, BSW addition led to increasing particle agglomeration at fouling temperatures. In particular, phosphorus composition influenced particle growth, which was verified using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM–EDX) analysis. Furthermore, the ash mixture ratio of BSW and coal changed the intensity of the phosphorus-bearing mineral phase from X-ray diffraction (XRD) analysis, and finally influenced the melting temperature of the ash. |
| Databáze: | OpenAIRE |
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