In situ parametric study of alkali release in pulverized coal combustion: Effects of operating conditions and gas composition

Combustion performance and sodium transformation of high-sodium ZhunDong coal during chemical looping combustion with hematite as oxygen carrier

“…And the volatilization of sodium, either during pyrolysis or gasification/combustion, will also probably lead to the corrosion or erosion of the turbine blades [21]. Therefore, the majority of current research has been devoted to the release behavior of sodium and the ash formation during the combustion process for the low-rank coals of high-sodium [22][23][24][25]. Vuthaluru et al [26] have proven that aqueous aluminum solutions have the effect of reducing the sodium content by ion exchange.…”

Release characteristic of different classes of sodium during combustion of Zhun-Dong coal investigated by laser-induced breakdown spectroscopy

“…The release of Na during coal combustion is a subject that has received much attention from various research groups in the last few decades [13][14][15][16][17][18][19][20]. Although these studies improved the understanding of the Na release mechanism, the release characteristics of the various Na compounds were seldom discussed.…”

On-line spectroscopic and spectrometric methods for the determination of metal species in industrial processes☆

“…Alkali species: The PFF method, described in Section 4.2.3, has been applied extensively for real-time monitoring in the area of solid fuel combustion, following development of the technique at the Physical Chemistry Institute in Heidelberg. Measurements of Na and K species have been made in pulverised [151,427,428] and fluidised bed (FB) [124,148,188,303,429e432] coal combustion as well as FB biomass combustion [123]. Table 6 gives an overview.…”

“…In this case, time-resolved signals recorded for 15e30 min under a constant set of conditions were averaged. For pulverised fuel combustion conditions (drop tube reactor), fuel composition effects have been investigated systematically at atmospheric pressure [427,428]. A hard coal was fired in the range 1000e1300 C, for residence times in the range 3e5 s and for air numbers (air/fuel ratios) from 1.15 to 1.50.…”

“…Real time measurement, varying conditions [427,428] Parametric study (T,p, O 2 etc.) [152,428] Sorbent effectiveness [148,303, 430e432] FB coal combustion NaCl, KCl…”