Activated carbons from oil-fired fly ashes

The Preparation of Silicon and Aluminum Extracts from Tuncbilek and Orhaneli Fly Ashes by Alkali Fusion

Coal fly ash is formed as a solid waste product from the combustion of coal in coal fired power stations. Huge amounts of fly ash are produced globally every year and are predicted to increase. Nowadays, less than half of the fly ash is used as a raw material for cement manufacturing, construction and the rest of it is disposed as a waste causing yet another environmental concern. For this reas...

Arsenic leachability and speciation in fly ashes from coal fired power plants

To determine dominant factors on arsenic leaching from the coal fly ash, arsenic leaching test under a constant pH was performed. Twelve fly ash samples were collected from two coal fired power plants (600 MWe) having different boiler types. Arsenic in the raw coal was almost all associated with the fly ash in both power plants; however arsenic leaching fraction was strongly differed in boiler ...

Determination of Selenium by Icp-ms and Hg-icp-ms in Coal, Fly Ashes and Sorbents Used for Flue Gas Cleaning

Selenium is an element of environmental concern which content in coal is generally lower than 2 mg g. During coal utilization for power generation this element may be emitted in gas phase or condensed in the particulate matter. To avoid the problems originated by such emissions different systems are being developed to retain selenium compounds in the system using solid sorbents. In this work, t...

Hazardous emissions from Thai coal-fired power plants: Toxic and potentially toxic elements in fly ashes collected from the Mae Moh and Thai Petrochemical Industry

On Unburned Carbon in Coal Ash from Various Combustion Units

Work is focused to the study of unburned carbon in ash from coal (and wastes) combustion in 8 combustion tests at 3 fluidised-bed power station, at co-combustion of coal and wastes (also at fluidized bed) and at bench-scale unit simulating coal combustion in small domestic furnaces. The attention is paid to unburned carbon contents in bottom ashes and fly ashes at these 8 combustion tests and t...