Clean Coal Combustion: Burning Issues of Syngas Burning

Lead Research Organisation: Brunel University London
Department Name: Sch of Engineering and Design

Abstract

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Publications

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Mira Martinez D (2014) Numerical assessment of subgrid scale models for scalar transport in large-eddy simulations of hydrogen-enriched fuels in International Journal of Hydrogen Energy

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Ranga Dinesh K (2014) Hydrogen-enriched non-premixed jet flames: Analysis of the flame surface, flame normal, flame index and Wobbe index in International Journal of Hydrogen Energy

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Ranga Dinesh K (2014) Near-field local flame extinction of oxy-syngas non-premixed jet flames: A DNS study in Fuel

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Mira Martinez D (2013) Numerical simulations of turbulent jet flames with non-premixed combustion of hydrogen-enriched fuels in Computers & Fluids

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Ranga Dinesh K (2013) Large eddy simulation of fuel variability and flame dynamics of hydrogen-enriched nonpremixed flames in Fuel Processing Technology

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Mira Martinez D (2013) Numerical investigations of a hydrogen impinging flame with different finite-rate chemical kinetic mechanisms in Fuel

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Zheng Y (2013) Large-eddy simulation of mixing and combustion in a premixed swirling combustor with synthesis gases in Computers & Fluids

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Ranga Dinesh K (2013) Direct numerical simulation of non-premixed syngas burning with detailed chemistry in Fuel

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Ranga Dinesh K (2013) Influence of fuel variability on the characteristics of impinging non-premixed syngas burning in Proceedings of the Combustion Institute

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Ranga Dinesh K (2013) Hydrogen-enriched nonpremixed jet flames: Effects of preferential diffusion in International Journal of Hydrogen Energy

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Mira Martinez D (2013) Large-eddy simulations of unsteady hydrogen annular flames in Computers & Fluids

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Ranga Dinesh K (2013) Hydrogen-enriched non-premixed jet flames: Compositional structures with near-wall effects in International Journal of Hydrogen Energy

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Mira Martinez D (2013) Numerical investigation of the effects of fuel variability on the dynamics of syngas impinging jet flames in Fuel

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Ranga Dinesh K (2012) Analysis of Impinging Wall Effects on Hydrogen Non-Premixed Flame in Combustion Science and Technology

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Ranga Dinesh K (2012) Numerical simulation of hydrogen impinging jet flame using flamelet generated manifold reduction in International Journal of Hydrogen Energy

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Ranga Dinesh K (2012) Combustion characteristics of H2/N2 and H2/CO syngas nonpremixed flames in International Journal of Hydrogen Energy

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Jiang X (2010) Swirling and Impinging Effects in an Annular Nonpremixed Jet Flame in Flow, Turbulence and Combustion

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Jiang X (2010) Numerical studies of vortex shedding in forced oscillatory non-premixed flames in IOP Conference Series: Materials Science and Engineering

 
Description (Please note that this project was completed under EP/G062714/2)
The project provided a comprehensive investigation of the flame behaviour of hydrogen enriched fuels such as syngas combustion. The specific objectives of the project have been fully achieved, including:
(1) The combustion dynamics of syngas burning has been investigated, including the potentially damaging combustion phenomena of hydrogen enriched fuels such as flashback and combustion instability which are caused particularly by the existence of hydrogen.
(2) Numerical methodologies which are able to predict the burning behaviours of hydrogen enriched fuels at both the fundamental level and practical application level have been developed based on direct numerical and large eddy simulations.
(3) The flame and wall interactions of hydrogen enriched fuels and near-wall flow, heat transfer and combustion models for unsteady reacting flows have been investigated.
Exploitation Route The efficient and clean burn of coal is of great importance to the energy sector. Coal gasification and the proper treatment of the generated syngas before the combustion can reduce emissions significantly through alternative power generation system such as Integrated Gasification Combined Cycle (IGCC). The syngas usually contains varying amounts of hydrogen. The existence of hydrogen in the syngas may cause undesirable flame flashback phenomenon, in which the flame propagates into the burner. The fast flame propagation speed of hydrogen can travel further upstream and even attached to the wall of the combustor. The strong heat transfer to the wall may damage the combustor components. The consequence can be very costly. Because of this, many existing combustors are not suitable for the burning of syngas. To overcome this bottle neck, in-depth knowledge of the flame dynamics of hydrogen enriched fuel is essential, which is still not available. There is also a need to study the flame-wall interactions, which are important to the life span of a combustor but have not been fully understood.
Using high-fidelity numerical simulations including direct numerical simulation and large eddy simulation, this project investigated the flame dynamics of syngas combustion including the flame flashback phenomenon, combustion instability, and flame-wall interactions. The flame dynamics was investigated for different types of burners with fuel variability. The knowledge gained from the project research and the physical models developed including improved near-wall flow, heat transfer and combustion models can lead to better combustion control and combustor design. The project enhanced the understanding on combustion of hydrogen enriched fuels and the development of technologies for clean combustion of hydrogen enriched fuels relevant to a potential "clean coal" industry.
The research findings have been widely published in archival journals, which can be accessed and taken forward or put to use by all stakeholders.
Sectors Aerospace, Defence and Marine,Chemicals,Energy,Environment,Transport
 
Description The research findings have been widely published in archival journals, which can be accessed and taken forward or put to use by all stakeholders. The research has also led to a subsequent EPSRC funded project "EP/K036750/1 Clean Energy Utilisation from Biogas and Biomass Gasification". Currently there are also Horizon 2020 proposals being prepared based on the research findings of this project.
First Year Of Impact 2013
Sector Aerospace, Defence and Marine,Chemicals,Energy,Environment,Transport
Impact Types Societal,Economic,Policy & public services