Investigation of ash deposition in a pilot-scale fluidized bed combustor co-firing biomass with lignite

Date

2009-01-01

Author

Gogebakan, Zuhal
Gogebakan, Yusuf
Selçuk, Nevin
Seliuk, Ekrem

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This study presents the results from investigation of ash deposition characteristics of a high ash and sulfur content lignite co-fired with three types of biomass (olive residue, 49 wt%; hazelnut shell, 42 wt%; and cotton residue, 41 wt%) in 0.3 MWt Middle East Technical University (METU) Atmospheric Bubbling Fluidized Bed Combustion (ABFBC) Test Rig. Deposit samples were collected on all air-cooled probe at a temperature of 500 degrees C. Samples were analyzed by SEM/EDX and XRD methods. The results reveal that co-firing lignite with olive residue, hazelnut shell and cotton residue show low deposition rates. High concentrations of silicon, calcium, sulfur, iron, and aluminum were found in deposit samples. No chlorine was detected in deposits. Calcium sulfate and potassium sulfate were detected as major and minor components of the deposits, respectively. High sulfur and alumina-silicate content of lignite resulted in formation of alkali sulfates instead of alkali chlorides. Therefore, fuel blends under consideration can be denoted to have low-fouling propensity.

Subject Keywords

Biomass, Lignite, Co-firing, Fluidized bed combustion, Ash deposition

URI

https://hdl.handle.net/11511/29907

Journal

BIORESOURCE TECHNOLOGY

DOI

https://doi.org/10.1016/j.biortech.2008.07.037

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

Z. Gogebakan, Y. Gogebakan, N. Selçuk, and E. Seliuk, “Investigation of ash deposition in a pilot-scale fluidized bed combustor co-firing biomass with lignite,” BIORESOURCE TECHNOLOGY, pp. 1033–1036, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/29907.