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Pollutant and corrosion control technology and efficient coal combustion

Daood, Syed Sheraz and Ottolini, Marc and Taylor, Scott and Ogunyinka, Ola and Hossain, Md. Moinul and Lu, Gang and Yan, Yong and Nimmo, William (2017) Pollutant and corrosion control technology and efficient coal combustion. Energy and Fuels, 31 (5). pp. 5581-5596. ISSN 0887-0624

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Abstract

High efficiency and low emissions from coal-fired power stations have been the drive behind the development of present and future efficient coal combustion technologies. Upgrading coal, capturing CO2, reducing emission of NOx, SO2, and particulate matter, and mitigating slagging, fouling, and corrosion are the key initiatives behind these efficient coal technologies. This study focuses on an efficient coal combustion technology utilizing a newly developed fuel additive (Silanite), which addresses most of the aforementioned key points. Silanite, a finely milled multioxide additive, when mixed with the coal without the need to change the boiler installation has been proven to increase the boiler efficiency and flame temperature with reduction in corrosion and NOx and particulate matter (dust) emissions. The process has been developed through bench, pilot (100 kWth), and full scale (233 MWth) and has been found to have a number of beneficial effects that add up to a viable retrofit to an existing power plant as demonstrated by results from 233 MWth boiler tests (under BS EN 12952-15:2003 standard). The benefits proven on commercial and laboratory scale include the following: reductions of 20% in the overall particulates, 42% in loss on ignition, and 8–25% in NOx with about 30% increase in the life span of the tube section of the boiler.