Predicting the Equilibrium Product Formation in Oxy-fuel Combustion of Octane (C8H18) using Numerical Modeling

Authors

  • Fabiano Fernandes Bargos Department of Basic and Environmental Sciences, Lorena School of Engineering, University of Sao Paulo, Brazil https://orcid.org/0000-0003-1688-3592
  • Estaner Claro Romao Department of Basic and Environmental Sciences, Lorena School of Engineering, University of Sao Paulo, Brazil
Volume: 13 | Issue: 3 | Pages: 10946-10950 | June 2023 | https://doi.org/10.48084/etasr.5881

Abstract

Preserving the environment is a major challenge for modern society, and reducing the greenhouse effect caused by combustion processes is a primary concern. It is known that nitrogen compounds (NOx) negatively impact air quality and public health. Internal combustion engines, responsible for nearly half of the atmosphere's pollutants, have prompted public policymakers to phase out gasoline and diesel-powered vehicles in the near future. Carbon capture and storage technologies, including oxy-fuel combustion, are being developed to address these environmental challenges. To predict exhaust pollutants such as NO and CO, assuming that the exhaust gases resulting from fuel and air combustion are in chemical equilibrium is a useful approximation. In the current case study, a numerical investigation on the impact of modifying the oxygen content of the reaction mixture from 21% to 100% on the equilibrium composition of C8H18 air-enriched combustion was conducted. Specifically, the equilibrium-constant approach routines were tailored for 10 species reported in the literature to the conditions of oxy-fuel combustion. Additionally, a comprehensive analysis was performed by varying the temperature and equivalence ratio alongside the oxygen level. The results emphasize the intricate interplay between various factors in oxy-combustion and provide valuable insight into the equilibrium product formation in oxy-fuel combustion. Notably, the non-uniform reduction of N2 as a function of O2 is highlighted, with an overall reduction rate of 0.93 observed across the range of O2 percentages from 21% to 99%.

Keywords:

air pollution, carbon capture and storage, nitrogen compounds, air-enriched combustion

Downloads

Download data is not yet available.

References

V. H. M. Nguyen, L. D. L. Nguyen, C. V. Vo, and B. T. T. Phan, "Green Scenarios for Power Generation in Vietnam by 2030," Engineering, Technology & Applied Science Research, vol. 9, no. 2, pp. 4019–4026, Apr. 2019. DOI: https://doi.org/10.48084/etasr.2658

J. Furlan, J. A. Martins, and E. C. Romão, "Dispersion of toxic gases (CO and CO2) by 2D numerical simulation," Ain Shams Engineering Journal, vol. 10, no. 1, pp. 151–159, Mar. 2019. DOI: https://doi.org/10.1016/j.asej.2018.03.010

M. Lupion, R. Diego, L. Loubeau, and B. Navarrete, "CIUDEN CCS Project: Status of the CO2 capture technology development plant in power generation," Energy Procedia, vol. 4, pp. 5639–5646, Jan. 2011. DOI: https://doi.org/10.1016/j.egypro.2011.02.555

M. A. Habib and M. A. Nemitallah, "Design of an ion transport membrane reactor for application in fire tube boilers," Energy, vol. 81, pp. 787–801, Mar. 2015. DOI: https://doi.org/10.1016/j.energy.2015.01.029

W. R. do Prado Junior, J. A. Martins, and E. C. Romao, "Utilizing Numerical Simulations to Analyze the Efficiency of a Porous Reactor," Engineering, Technology & Applied Science Research, vol. 12, no. 3, pp. 8755–8759, Jun. 2022. DOI: https://doi.org/10.48084/etasr.4957

Q. B. Jamali et al., "Analysis of CO2, CO, NO, NO2, and PM Particulates of a Diesel Engine Exhaust," Engineering, Technology & Applied Science Research, vol. 9, no. 6, pp. 4912–4916, Dec. 2019. DOI: https://doi.org/10.48084/etasr.3093

S. Turns, An Introduction to Combustion: Concepts and Applications, 3rd ed. New York, NY, USA: McGraw Hill, 2011.

A. Braga, L. A. A. Pereira, G. M. Böhm, and P. Saldiva, "Poluição atmosférica e saúde humana," Revista USP, no. 51, pp. 58–71, Nov. 2001. DOI: https://doi.org/10.11606/issn.2316-9036.v0i51p58-71

F. Leach, "A negative emission internal combustion engine vehicle?," Atmospheric Environment, vol. 294, Feb. 2023, Art. no. 119488. DOI: https://doi.org/10.1016/j.atmosenv.2022.119488

D. Fernandes, "Por que os carros movidos a gasolina e diesel estão com os dias contados em países europeus e vários emergentes," BBC News Brasil, Nov. 20, 2017.

G. Scheffknecht, L. Al-Makhadmeh, U. Schnell, and J. Maier, "Oxy-fuel coal combustion—A review of the current state-of-the-art," International Journal of Greenhouse Gas Control, vol. 5, pp. S16–S35, Jul. 2011. DOI: https://doi.org/10.1016/j.ijggc.2011.05.020

L. Zheng, Ed., Oxy-Fuel Combustion for Power Generation and Carbon Dioxide (CO2) Capture. Woodhead Publishing, 2011. DOI: https://doi.org/10.1533/9780857090980.3.335

C. Olikara and G. L. Borman, "A Computer Program for Calculating Properties of Equilibrium Combustion Products with Some Applications to I.C. Engines," SAE International, Warrendale, PA, USA, SAE Technical Paper 750468, Feb. 1975. DOI: https://doi.org/10.4271/750468

D. S. Fox et al., "Natural Gas/Oxygen Burner Rig at The NASA Glenn Materials Research Laboratory," NASA, Cleveland, OH, USA, NASA/TM-20220002202, 2022.

J. Heywood, Internal Combustion Engine Fundamentals, 1st ed. New York, NY, USA: McGraw-Hill Education, 1988.

C. R. Ferguson and A. T. Kirkpatrick, Internal Combustion Engines: Applied Thermosciences, 3rd ed. Chichester, West Sussex, UK: Wiley, 2015.

H. K. Kayadelen and Y. Ust, "Prediction of equilibrium products and thermodynamic properties in H2O injected combustion for CαHβOγNδ type fuels," Fuel, vol. 113, pp. 389–401, Nov. 2013. DOI: https://doi.org/10.1016/j.fuel.2013.05.095

Downloads

How to Cite

[1]
Bargos, F.F. and Romao, E.C. 2023. Predicting the Equilibrium Product Formation in Oxy-fuel Combustion of Octane (C8H18) using Numerical Modeling. Engineering, Technology & Applied Science Research. 13, 3 (Jun. 2023), 10946–10950. DOI:https://doi.org/10.48084/etasr.5881.

Metrics

Abstract Views: 664
PDF Downloads: 406

Metrics Information

Most read articles by the same author(s)