Combustion of agro-waste with coal in a fluidized bed

Date

2010-02-01

Author

Atımtay, Aysel

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In this study, a review of the studies done on the co-combustion of some agro-waste in a bubbling fluidized bed combustor (BFBC) having an inside diameter of 102 mm and a height of 900 mm is given. The agro-waste used to investigate the co-combustion characteristics were peach and apricot stones produced as a waste from the fruit juice industry, and olive cake produced as a waste from the olive oil industry. These are typical wastes for a Mediterranean country. A lignite coal was used for co-combustion. On-line concentrations of O(2), CO, CO(2), SO(2), NO (x) and total hydrocarbons (C (m) H (n) ) were measured in the flue gas during combustion experiments. Variations of emissions of various pollutants were studied by changing the operating parameters (excess air ratio, fluidization velocity and fuel feed rate). Temperature distribution along the bed was measured with thermocouples. Emissions were also monitored from the exhaust. Various combinations of coal and biomass mixtures were tested. During the combustion tests, it was observed that the volatile matter from the biomass quickly volatilizes and mostly burns in the freeboard. The temperature profiles along the bed and the freeboard also confirmed this phenomenon. It was found that as the volatile matter of the biomass increases, combustion takes place more in the freeboard region. Better combustion conditions occur at higher excess air ratios. The results showed that co-combustion with these three proposed biomasses lowers the SO(2) and NO (x) emissions considerably. CO and hydrocarbon emissions are lower at the higher excess air ratios.

Subject Keywords

Biomass combustion, Olive cake, Peach and apricot stone combustion, Bubbling fluidized bed combustion

URI

https://hdl.handle.net/11511/30614

Journal

CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY

DOI

https://doi.org/10.1007/s10098-009-0220-9

Collections

Graduate School of Natural and Applied Sciences, Article

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Co-combustion of peach and apricot stone with coal in a bubbling fluidized bed Atımtay, Aysel (2008-02-01) In this study a bubbling fluidized bed combustor (BFBC) having an inside diameter of 102 mm and a height of 900 mm was used to investigate the co-combustion characteristics of peach and apricot stones produced as a waste from the fruit juice industry with coal. A lignite coal was used for co-combustion. on-line concentrations of O-2, CO, CO2, SO2, NOx and total hydrocarbons (CmHn) were measured in the flue gas during combustion experiments. Variations of emissions of various pollutants were studied by chang...
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Combustion of olive cake and coal in a bubbling fluidized bed with secondary air injection Varol, Murat; Atımtay, Aysel (2007-07-01) Combustion performances and emission characteristics of olive cake and coal are investigated in a bubbling fluidized bed. Flue gas concentrations of O-2, CO, SO2, NOx, and total hydrocarbons (CmHn) were measured during combustion experiments. Operational parameters (excess air ratio (lambda), secondary air injection) were changed and variation of pollutant concentrations and combustion efficiency with these operational parameters were studied. The temperature profiles measured along the combustor column was...

Citation Formats

A. Atımtay, “Combustion of agro-waste with coal in a fluidized bed,” CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY, pp. 43–52, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30614.