Experimental investigation on the kinetics of biomass combustion in vertical tube reactor
Abstract
The paper presents results of experimental investigation performed in order to examine kinetics of loose biomass combustion in vertical tube reactor. The investigation conducted included continuous measurement of the fuel mass loss rate, with two biomass combustion models (piston and batch model) proposed, each relying on appropriate theoretical postulates. Results obtained indicated that piston combustion model had shown better agreement between theoretical and experimental data and was therefore used to further analyse effects of excess-air on the combustion kinetics, as well as associated effects of flue gas recirculation. Recirculation of cold flue gases is used to lower peak temperature inside the furnace, as well as to reduce a zone where ash melting problems may potentially occur. During the investigation performed, effects of flue gas recirculation on the combustion process were simulated by simultaneously injecting nitrogen and air flows into the furnace. This was deemed appro...priate to simulate real-life conditions prevailing in the furnace with gas recirculation. Experiments were conducted on specially designed and constructed apparatus that enabled kinetic parameters to be determined for the combustion of different types of biomass. Results obtained have indicated that quantity of air affects kinetics of biomass combustion and that increased recirculation leads to reduced biomass reaction rate. The same conclusion was reached based on the results of experiments conducted with two different types of agro-biomass, namely wheat straw and corn stalks, which are most commonly used for energy generation. Results achieved are deemed particularly important when it comes to design of new plants that utilize cigarette type combustion system, but also for development of numerical models used to simulate combustion of biomass bales, with special emphasis placed on the impact of recirculation gases on the combustion kinetics.
Keywords:
Vertical tubular combustion chamber / Recirculation / Kinetics / BiomassSource:
Journal of The Energy Institute, 2019, 92, 4, 1077-1090Publisher:
- Elsevier Sci Ltd, Oxford
Funding / projects:
- step forward in developing energy efficient and environmentally sound waste combustion technology in fluidized bed combustors
- Development and improvement of technologies for energy efficient and environmentally sound use of several types of agricultural and forest biomass and possible utilization for cogeneration (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-42011)
- Fluidized bed combustion facility improvements as a step forward in developing energy efficient and environmentally sound waste combustion technology in fluidized bed combustors (RS-MESTD-Technological Development (TD or TR)-33042)
DOI: 10.1016/j.joei.2018.06.009
ISSN: 1743-9671
WoS: 000473381000023
Scopus: 2-s2.0-85049339993
Collections
Institution/Community
Mašinski fakultetTY - JOUR AU - Erić, Aleksandar AU - Nemoda, Stevan AU - Komatina, Mirko AU - Dakić, Dragoljub AU - Repić, Branislav PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3016 AB - The paper presents results of experimental investigation performed in order to examine kinetics of loose biomass combustion in vertical tube reactor. The investigation conducted included continuous measurement of the fuel mass loss rate, with two biomass combustion models (piston and batch model) proposed, each relying on appropriate theoretical postulates. Results obtained indicated that piston combustion model had shown better agreement between theoretical and experimental data and was therefore used to further analyse effects of excess-air on the combustion kinetics, as well as associated effects of flue gas recirculation. Recirculation of cold flue gases is used to lower peak temperature inside the furnace, as well as to reduce a zone where ash melting problems may potentially occur. During the investigation performed, effects of flue gas recirculation on the combustion process were simulated by simultaneously injecting nitrogen and air flows into the furnace. This was deemed appropriate to simulate real-life conditions prevailing in the furnace with gas recirculation. Experiments were conducted on specially designed and constructed apparatus that enabled kinetic parameters to be determined for the combustion of different types of biomass. Results obtained have indicated that quantity of air affects kinetics of biomass combustion and that increased recirculation leads to reduced biomass reaction rate. The same conclusion was reached based on the results of experiments conducted with two different types of agro-biomass, namely wheat straw and corn stalks, which are most commonly used for energy generation. Results achieved are deemed particularly important when it comes to design of new plants that utilize cigarette type combustion system, but also for development of numerical models used to simulate combustion of biomass bales, with special emphasis placed on the impact of recirculation gases on the combustion kinetics. PB - Elsevier Sci Ltd, Oxford T2 - Journal of The Energy Institute T1 - Experimental investigation on the kinetics of biomass combustion in vertical tube reactor EP - 1090 IS - 4 SP - 1077 VL - 92 DO - 10.1016/j.joei.2018.06.009 ER -
@article{ author = "Erić, Aleksandar and Nemoda, Stevan and Komatina, Mirko and Dakić, Dragoljub and Repić, Branislav", year = "2019", abstract = "The paper presents results of experimental investigation performed in order to examine kinetics of loose biomass combustion in vertical tube reactor. The investigation conducted included continuous measurement of the fuel mass loss rate, with two biomass combustion models (piston and batch model) proposed, each relying on appropriate theoretical postulates. Results obtained indicated that piston combustion model had shown better agreement between theoretical and experimental data and was therefore used to further analyse effects of excess-air on the combustion kinetics, as well as associated effects of flue gas recirculation. Recirculation of cold flue gases is used to lower peak temperature inside the furnace, as well as to reduce a zone where ash melting problems may potentially occur. During the investigation performed, effects of flue gas recirculation on the combustion process were simulated by simultaneously injecting nitrogen and air flows into the furnace. This was deemed appropriate to simulate real-life conditions prevailing in the furnace with gas recirculation. Experiments were conducted on specially designed and constructed apparatus that enabled kinetic parameters to be determined for the combustion of different types of biomass. Results obtained have indicated that quantity of air affects kinetics of biomass combustion and that increased recirculation leads to reduced biomass reaction rate. The same conclusion was reached based on the results of experiments conducted with two different types of agro-biomass, namely wheat straw and corn stalks, which are most commonly used for energy generation. Results achieved are deemed particularly important when it comes to design of new plants that utilize cigarette type combustion system, but also for development of numerical models used to simulate combustion of biomass bales, with special emphasis placed on the impact of recirculation gases on the combustion kinetics.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Journal of The Energy Institute", title = "Experimental investigation on the kinetics of biomass combustion in vertical tube reactor", pages = "1090-1077", number = "4", volume = "92", doi = "10.1016/j.joei.2018.06.009" }
Erić, A., Nemoda, S., Komatina, M., Dakić, D.,& Repić, B.. (2019). Experimental investigation on the kinetics of biomass combustion in vertical tube reactor. in Journal of The Energy Institute Elsevier Sci Ltd, Oxford., 92(4), 1077-1090. https://doi.org/10.1016/j.joei.2018.06.009
Erić A, Nemoda S, Komatina M, Dakić D, Repić B. Experimental investigation on the kinetics of biomass combustion in vertical tube reactor. in Journal of The Energy Institute. 2019;92(4):1077-1090. doi:10.1016/j.joei.2018.06.009 .
Erić, Aleksandar, Nemoda, Stevan, Komatina, Mirko, Dakić, Dragoljub, Repić, Branislav, "Experimental investigation on the kinetics of biomass combustion in vertical tube reactor" in Journal of The Energy Institute, 92, no. 4 (2019):1077-1090, https://doi.org/10.1016/j.joei.2018.06.009 . .