• Ruzita Aqmar Mohd Nordin Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81200 Skudai, Johor DT, Malaysia +Malaysian Nuclear Agency, Bangi 43000, Kajang, Selangor, Malaysia
  • Muhd Noor Muhd Yunus Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81200 Skudai, Johor DT, Malaysia +Malaysian Nuclear Agency, Bangi 43000, Kajang, Selangor, Malaysia
  • Farid Nasir Ani Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81200 Skudai, Johor DT, Malaysia +Malaysian Nuclear Agency, Bangi 43000, Kajang, Selangor, Malaysia


Combustion, NOx prediction, Computational Fluid Dynamics (CFD)


Disposal of municipal solid waste (MSW) is one of the major problems in many urban areas and can be considered a serious global environmental issue. Incineration has become the most environmental-friendly method of disposing waste and it is important for recovery of energy from waste which reduces the net release of carbon dioxide to the atmosphere and eliminates the production of methane from landfill. Computational fluid dynamics (CFD) modelling is used in the development phase and very useful tool for simulation modelling of the complex geometry and flow conditions in incinerators. CFD modelling and flow simulation with detailed parametric variations of design variables of an industrial scale MSW incinerator was done using ANSYS FLUENT to simulate the combustion and thermal flow and to determine velocity profiles, temperatures, and NOx distributions. In order to minimize the pollutants emission from the MSW incinerators, an improved mixing of air is formulated to increase oxidative destruction of incomplete combustion by secondary air injection into the combustion chamber. The results predicted that the NOx formation in the boiler is highly depended on the combustion processes along with the temperature and species concentrations. It has shown that over-fire air (OFA) operation is a good way to reduce the NOx emissions from the boiler.


Abdul, A., Rozainee, M. Anwar, J and Wan Alwi, R.S, 2011. Combustion Studies ofRefused-Derived Fuel (RDF) in Fluidized Bed (FB) System a Method. 2011 IEEE First Conference on Clean Energy and Technology CET. 978-1-4577-1354-5/11 2011.

Ahmad Hussain, Farid Nasir Ani, Norzalia Sulaiman and Mohammed Fadzil Adnan, 2006. Combustion modelling of an industrial municipal waste combustor in Malaysia. International

Journal of Environmental Studies, 63(3), 313–329.

ANSYS-INC. (2011). ANSYS FLUENT User's Guide. Release 14.0.

ANSYS-INC. (2011). ANSYS FLUENT Theory Guide. Release 14.0.

ANSYS-INC. (2011). ANSYS FLUENT Tutorial Guide. Release 14.0.

Chang Kook Ryu and Sangmin Choi, 1996. 3-Dimensional Simulation of Air Mixing in the MSW Incinerators. Combustion Science and Technology,119, 155-170.

Chen, S.S., Isnazunita Ismail, Abdul Nasir Adnan, Puvaneswari Ramasamy, 2011. Refuse Derived Fuel – Case Study of Waste as Renewable Resource. International Journal for Sustainable Innovations, 1(1).

Choeng Ryul Choi, Chang Nyung Kim, 2009. Numerical Investigation on the Flow, Combustion and NOx Emission Characteristics in a 500 MWe Tangentially Fired PulverizedCoal

Boiler. Fuel 88, 1720–1731.

Chungen Yin, Lasse A. Rosendahl, Søren K. Kær, 2008. Grate-firing of Biomass for Heat and Power Production. Progress in Energy and Combustion Science 34, 725– 754.

Dixon, T.F., Mann, A.P., Plaza, F. and Gilfillan, W.N., 2005. Development of Advanced Technology for Biomass Combustion—CFD as an Essential Tool. Fuel 84, 1303–1311.

Donghoon Shin and Sangmin Choi, 2000. The Combustion of Simulated Waste Particles in a Fixed Bed. Combustion and Flame 121,167–180.

Eddy H. Chui and Haining Gao, 2010. Estimation of NOx Emissions from Coal-Fired Utility Boiler. Fuel 89, 2977-2984.

Gittinger J.S., Arvan W.J., 1998. Considerations for the Design of RDF-Fired Refuse Boilers. Power-Gen Europe ’98, June 9-11, 1998, Milan, Italy

Habib M.A., Elshafei M., 2006. Computer Simulation of NOx Formation in Boilers.

Habib M.A., R. Ben-Mansour and Abualhamayel H.I., 2010. Thermal and Emission Characteristics in a Tangentially Fired Boiler Model Furnace. Int. J. Energy Resource, 34, 1164–1182.

Habib M.A., Elshafei M., Dajani M., 2008. Influence of Combustion Parameters on NOx production in an Industrial Boiler. Computer & Fluids 37, 12-23.

Ismail N and Ani FN, 2013. Solid Waste Management and Treatment in Malaysia. Applied Mechanics and Materials.

Kathirvale S, Muhd Yunus MN, Sopian K, Samsuddin AH, 2003. Energy Potential from Municipal Solid Waste in Malaysia. Renewable Energy 29, 559–67.

Kitto J.B. and Stultz S.C., 2005. Steam/ Its Generation and Use, Chapter 29: Waste-toEnergy Installations. 41st Edition. Babcock and Wilcox Company.

Lawrence A. Ruth, 1998. Energy from Municipal Solid Waste: A Comparison with Coal Combustion Technology. Prog. Energy Combust. Sci.,24, 545-564.

Ligang Liang, Rui Sun, Jun Fei, Shaohua Wu, Xiang Liu, Kui Dai, Na Yao, 2008. Experimental study on effects of moisture content on combustion characteristics of simulated municipal solid wastes in a fixed bed. Bioresource Technology, 99, 7238–7246.

Luis I. Diez, Cristobal Cortes, Javier Pallares, 2008. Numerical Investigation of NOx Emissions from a Tangentially-Fired Utility Boiler Under Conventional and Overfire Air Operation. Fuel 87, 1259–1269.

Mel Fox and Ande L.Boehman, 2004. Simulation and NOx Corelation for Coal-Fired Boiler. Prepr. Pap. –Am. Chem. Soc., Div. Fuel Chem, 49 (2), 824.

Minghou Xu, Azevedo, J.L.T and Carvalho, M.G., 2001. Modelling of a Front Wall Fired

Utility Boiler for Different Operating Conditions. Comput. Methods Appl. Mech. Engrg., 190, 3581-3590.

Miran Kapitler, Niko Samec, and Filip Kokalj, 2011. Computational Fluid Dynamics Calculations of Waste-To-Energy Plant Combustion Characteristics. Thermal Science, 15(1), 1-16.

Nasserzadeh, V., Swithenbank, J., Scott, D. and Jones, B., 1991. Design Optimization of a

Large Municipal Solid Waste Incinerator. Waste Management, 11, 249-261.

Noor, M.M, Andrew P. Wandel and Talal Yusaf, 2013. Detail Guide for CFD on the Simulation of Biogas Combustion of Biogas Combustion in Bluff-Body MILD Burner. ICMER 2013, Kuantan, Malaysia. 1-3 July, Paper ID: P342.

Prodpran T. Siritheerasas, Panitta Sawasdee, and Sudtida Inthakanok, 2008. Combustion of a Single-particle Refuse-derived Fuel (RDF). Thammasat Int. J. Sc. Tech, 13 Special Edition.

Raja Sarapalli, Ting Wang, Benjamin Day, 2005. Simulation of Combustion and Thermal Flow in an Industrial Boiler. Proceedings of 27th Industrial Energy Technology Conference. May 11-12, 2005, New Orleans, Louisiana.

Ryu, C., Shin, D. and Choi, S., 1999. Bed combustion and gas flow model for MSW incinerator. Int. J. of Computer Application in Technology.

Saeed, M. O., Hassan, M. N., and Abdul Mujeebu, M., 2008. Development of Municipal Solid Waste Generation and Recyclable Components Rate of Kuala Lumpur: Perspective Study.

Saidur, R., Abdelaziz, E.A., Demirbas, A., Hossain, M.S. and Mekhilef, S., 2011. A review on biomass as a fuel for boilers. Renewable and Sustainable Energy Reviews 15, 2262–2289.

Sivapalan Kathiravale, Mohamad Puad Abu, Muhd. Noor Muhd. Yunus, Kamarul Zaman

Abd Kadir, 2003. Predicting the Quality of the Refuse Derived Fuel from the Characteristics of the Municipal Solid Waste. Proceedings of the 2nd Conference on Energy Technology towards a Clean Environment, Phuket, Thailand.

Sun, Gong-Gang, De-Fu Che and Zuo-He Chi, 2012. Effects of Secondary Air on Flow, Combustion, and NOx Emission from a Novel Pulverized Coal Burner for Industrial Boilers. Energy Fuels, 26, 6640−6650.

Swithenbank, J., Nassezadeh, V., Goh, R. and Siddall, R.G., 1999. Fundamental Principles of Incinerator Design. Dev. Chem. Eng. Mineral Process., 7(5/6), 623-640.

Won Yang, Donghoon Shin and Sangmin Choi, 1998. A process simulation model for a 2 ton/hr incinerator (A combined bed combustion and furnace heat transfer model).

International Journal of Energy Research, 22 (11), 943-951.

Yang, Y.B., Sharifi, V.N. and Swithenbank, J., 2004. Effect of Air Flow Rate and Fuel Moisture on the Burning Behaviours of Biomass and Simulated Municipal Solid Wastes in Packed Beds. Fuel 83, 1553-1563.

Yang, Y.B., Goh, Y.R., Zakaria, R., Nasserzadeh, V. and Swithenbank J., 2002. Mathematical modelling of MSW incineration on a travelling bed. Waste Management 22, 369–380.

Zainura Zainon Noor, Rafiu Olasunkanmi Yusuf, Ahmad Halilu Abba, Mohd Ariffin Abu Hassan, Mohd Fadhil Mohd Din, 2013. An overview for energy recovery from municipal solid wastes (MSW) in Malaysia scenario. Renewable and Sustainable Energy Reviews 20,





How to Cite

Mohd Nordin, R. A., Muhd Yunus, M. N., & Ani, F. N. (2018). SIMULATION OF COMBUSTION AND THERMAL FLOW IN AN INDUSTRIAL BOILER WITH NOx PREDICTIONS. Jurnal Mekanikal, 37(1). Retrieved from