Investigation of the effects of equivalence ratio on combustion characteristics in combustion of mixed gas CO2-O2 and biogas

Abstract

This study concentrates on the numerical analysis of combustion of different oxidisers and numerical analysis of distributed combustion. The primaily aim of this study is to investigate the combustion properties of different equivalence rate , which are temperature and emission values, with a burner. It was carried out with biogas and a mixture of gas, then temperature and emission values were examined at different points in the model burner in this study. This experimental work has been repeated numerically at the different conditions with equivalance ratio. In addition, numerical studies have been carried out with 1.25, 1, 0.83 and 0.71 equivalance ratio, respectively. In the numerical study, gas of mixture 50% O2 - 50% CO2 was used for air on combustion biogas. It was observed that as the equivalence rate increased, the temperature values in the combustion chamber decreased axially on the distributed combustion.

Keywords

• Biogas,Distributed,Oxy-Fuel,Combustion

References

1. [1] Dirkse EHM, Biogas upgrading using the DMT TS-PWS® Technology, Report, Page 2-12, DMT Environmental Technology.
2. [2] Khalil AEE, Gupta AK. Thermal field investigation under distributed combustion conditions. Appl Energy 2015;160:477–88.
3. [3] Markewitz P, Kuckshinrichs W, Leitner W, Linssen J, Zapp P, Bongartz R, etal. Worldwide innovations in the development of carbon capture technologies and the utilization of CO2. Energy Environ Sci 2012;5:7281–305. https://doi.org/10.1039/ C2EE03403D.
4. [4] Wall TF. Combustion processes for carbon capture. Proc Combust Inst 2007;31(1):31–7. https://doi.org/10.1016/j.proci.2006.08.123.
5. [5] Malti G, Sudhakar M, Shahi RV. Carbon capture, storage, andutilization: apossible climate change solution for energy industry. NewDelhi: TERI; 2015.
6. [6] Şahin M, Combustion characteristics of various biogas flames under reduced oxygen concentration conditions. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 41(19), 2415-2427. 2019.
7. [7] Karyeyen S, Combustion characteristics of a non-premixed methane flame in a generated burner under distributed combustion conditions: A numerical study, Fuel 2018;230:163-171.
8. [8] Khalil AEE., Gupta AK., Swirling distributed combustion for clean energy conversion in gas turbine applications. Appl Energy 2011;88:3685–93.

9. [9] Arghode VK., Gupta AK., Bryden K.M., High intensity colorless distributed combustion for ultra low emissions and enhanced performance. Appl Energy 2012;92:822–830.
10. [10] Arghode, VK., Gupta, AK., Effect of flow field for colorless distributed combustion (CDC) for gas turbine combustion," Applied Energy 2010;87:1631–40.
11. [11] Ilbas M, Sahin M, Karyeyen S. 3D numerical modelling of turbulent biogas combustion in a newly generated 10 KW burner. J Energy Institute 2018;91:87-99.