The Effects of Ash Deposits on High-Temperature Corrosion of Alloys in a Fluidized Bed Combustion System

CORROSION ◽  
2001 ◽  
Vol 57 (3) ◽  
pp. 253-264 ◽  
Author(s):  
K. Liu ◽  
W-P. Pan ◽  
J. T. Riley ◽  
I. G. Wright ◽  
K. K. Ho ◽  
...  
Keyword(s):  
High Temperature ◽  
Fluidized Bed ◽  
High Temperature Corrosion ◽  
Combustion System ◽  
Fluidized Bed Combustion

Synergistic Effect of High Temperature Fly Ash with Fluidized Bed Combustion Fly Ash in Cement Composites

2016 ◽  
Vol 722 ◽  
pp. 113-118
Author(s):  
Martin Ťažký ◽  
Rudolf Hela
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Fluidized Bed ◽  
Fossil Fuels ◽  
Cement Composite ◽  
Pozzolanic Reaction ◽  
Cement Composites ◽  
Fluidized Bed Combustion ◽  
Cement Pastes ◽  
Free Cao

Using high temperature fly ash for his pozzolan properties to cement composite production is known a few years ago. New ways combustion of fossil fuels also creates a new type of fly ash, named fluidized bed combustion fly ash. However, this fly ash has same pozzolan properties as has high temperature fly ash, this type is not using for production of cement composites. Fluidized bed combustion fly ash has highly variable chemical composition but usually it has a higher amount of free CaO together with sulphates. This higher amounts of free CaO after mixing of fluidized bed combustion fly ash with water to some extent becomes an activator for the beginning of the pozzolanic reaction, during which is consumed the extinguished CaO. If there is also present high temperature fly ash in cement composite, it could be accelerated his pozzolanic reaction in the same manner using a fluidized bed combustion fly ash. In this experiment was tested a synergy effect in the use of fluidized bed combustion fly ash with high temperature fly ash as an additive. The experiment was carried out on cement pastes that have been studied in particular the progress of hydration processes, pointing to a possible acceleration of pozzolanic reactions of both types of fly ash.

Effects of high-temperature fly ash and fluidized bed combustion ash on the hydration of Portland cement

2015 ◽  
Vol 78 ◽  
pp. 181-188 ◽  
Author(s):  
Pavel Šiler ◽  
Petr Bayer ◽  
Tomáš Sehnal ◽  
Iva Kolářová ◽  
Tomáš Opravil ◽  
...  
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Portland Cement ◽  
Fluidized Bed ◽  
Fluidized Bed Combustion

Co-firing of pine chips with Turkish lignites in 750 kWth circulating fluidized bed combustion system

2017 ◽  
Vol 224 ◽  
pp. 601-610 ◽  
Author(s):  
Aysel T. Atimtay ◽  
Ufuk Kayahan ◽  
Alper Unlu ◽  
Berrin Engin ◽  
Murat Varol ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Combustion System ◽  
Fluidized Bed Combustion ◽  
Circulating Fluidized Bed Combustion
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