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N 2 formation during pyrolysis of Mg-, Ca-, Sr- and Ba-loaded low rank coal at 1200 o C has been examined with a fixed bed quartz reactor in an inert atmosphere. At 10 o C/min, the Ca, Sr and Ba, except for Mg, increase considerably the formation rate between 850 and 1100 o C, and N 2 yield reaches >=60% at 1200 o C. The increase in the yield is almost...
Pyrolysis of 10 coals with carbon contents of less than 80wt%(daf) has been studied with a fixed bed quartz reactor to examine mainly nitrogen release from char-N without volatile matters. When temperature is raised from 1000 to 1350 o C, N 2 yield increases but char-N decreases for all the coals used. There is a strong reverse correlation between N 2 and char-N, which points...
Formation of N 2 during temperature programmed pyrolysis at 10 o C/min of low rank coals up to 1350 o C has been studied with a fixed bed quartz reactor. When Ca 2+ ions are exchanged with the raw or demineralized coals by using a saturated aqueous solution of Ca(OH) 2 , the Ca enhances the formation rate mainly at around 820 or 850-1100 o C, respectively...
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