The Influence of calcium Presence in Lignite on Conversion of Fuel Nitrogen during Pyrolysis

• Autorzy: Zacharczuk W. , Hardy T.
• Języki publikacji: EN

Abstrakty

EN

The effect of calcium presence in lignite on conversion of fuel nitrogen (Nf) to char-N during pyrolysis has been investigated. The experiment was carried out in the fixed bed reactor at the temperature in the range of 700 - 1000 C. At first, the lignite was demineralized with HCl, in order to exclude mineral matter in the coal used. Next, Ca2+ ions were introduced into the lignite samples by using aqueous solution of calcium acetate Ca(CH3COO)2. The influence of calcium addition in lignite on the Nf conversion was studied using raw, demineralized and impregnated coal samples. The obtained results show that calcium Ca presence in lignite decreases yield of char-N during pyrolysis (decreases the coal-N conversion to char-N). Demineralization of lignite with HCl washing increases yields of char-N during pyrolysis. The addition of 3% Ca to the demineralized coal shows almost the reverse effect. It is likely that fine particles of CaO derived from Ca2+ ions present in raw and impregnated coal promote Nf conversion to N2 instead to char-N during pyrolysis.

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2003
• Tom: Vol. 23 nr 1-2
• Strony: 63--68
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Zacharczuk W.

autor

Hardy T.

• Zacharczuk, W. - Corresponding author: Tel. [phone]; Hardy, T. - Institute of Heat Engineering and Fluid Mechanics, Wrocław University of Technology, W. Wyspiańskiego 27, 50-370 Wrocław, Poland,