The ignition, combustion, and emission behavior of crushed corn cob pellets of different shapes and sizes with a chemical binder (Epoxy1092) under certain operating conditions in a fixed-bed combustor were investigated in this study. Also, chemical kinetic parameters are determined by using thermogravimetric and differential thermogravimetric (TG/DTG) analysis data for both pellet and binder. It was found that the activation energy value is 129.82 kJ mol−1 for pellets, while the activation energy value is 109.62 kJ mol−1 for epoxy 1092. The surface and central pellet temperatures histories, the mass loss rates, conversion rate as well as a simple combustion ash analysis are recorded and analyzed. It was found that increasing the starting air temperature and air velocity and decreasing the size of pellet lead to a decrease in devolatilization time, time to reach maximum temperature, char combustion time, and an increase in the total combustion rate. Regarding to emissions; it was found that the CO2 content increased with increasing the starting air temperature and flow velocity and the maximum CO concentration reaches to 49 ppm at 9.6 ± 1.04% O2. The fouling, slagging indices, and ash viscosity were investigated. The corn cob pellets show a relatively high fouling inclination (FI) and a medium slagging inclination.
Assessment of the Combustion and Emission Behavior of Crushed Corn Cob Pellets in a Fixed-Bed Combustor
Al-Sahrkia 44511, Egypt
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received January 8, 2018; final manuscript received June 20, 2018; published online September 17, 2018. Assoc. Editor: Matthew Oehlschlaeger.
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El-Sayed, S. A., and Khairy, M. (September 17, 2018). "Assessment of the Combustion and Emission Behavior of Crushed Corn Cob Pellets in a Fixed-Bed Combustor." ASME. J. Thermal Sci. Eng. Appl. February 2019; 11(1): 011002. doi: https://doi.org/10.1115/1.4040964
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