Abstract
Abstract Oxy-combustion with coal and biomass co-firing is a technology that could revolutionize fossil fuel power generation. It can significantly reduce harmful greenhouse gas emissions and permit the continued use of plentiful coal supplies and thereby secure our future energy needs without the severe environmental impacts expected if fossil fuels are used without CCS. The work presented here was conducted by means of experimental tests co-firing coal and biomass under oxy-firing conditions at the retrofitted 100 kW th oxy-combustor facility at Cranfield University. A parametric study was performed with respect to the effect of recycled ratio and fuel variability on gas composition (including SO 3 ), temperatures, heat flux, burn-out and ash deposition. Furthermore, the possible compensation in heat transfer resulting from the higher heat capacity and emissivity of the gases in the oxy-combustion process as compared to the air-firing case was explored. This was done by the use of blends of coal and biomass, and we concluded that this compensation is unlikely to be significant due to the marked differences between heat fluxes reached under air and oxy-firing conditions.
Highlights
The rapid increase in emissions of greenhouse gasses has led to new policies being developed to mitigate this problem
For the air-firing experiments, the fluidized bed (FB) module was used as a preheater for the air, with the pulverized fuel fed directly to the burner associated to the PF combustor
The results indicate that the maximum CO2 level reached, on a wet basis, occurs in the case of 100% coal [EC.O.(c)], as expected given the fuel
Summary
The rapid increase in emissions of greenhouse gasses has led to new policies being developed to mitigate this problem. Amongst the most important initiatives, are the Kyoto Protocol (1998) and the Intergovernmental Panel on Climate Change (IPCC, 2007). N. Jurado et al / Energy Procedia 63 (2014) 440 – 452. As a consequence of new regulations, the use of renewable sources of energy such as hydro power, solar, wind or biomass are being promoted by the governments of developed countries. The use of fossil fuel power plants is still necessary to address rising energy demands. The second result of the new policies is changes to fossil fuel-fired power generation technology to satisfy the current regulations regarding reduction of greenhouse gas emissions. Several carbon capture and storage (CCS) technologies are being developed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
