A study on the effects of catalysts on pyrolysis and combustion characteristics of Turkish lignite in oxy-fuel conditions

An experimental study of CaSO 4 decomposition during coal pyrolysis

“…The result showed that about only 11.6% of carbon of the coal was reduced at 800°C under 20% CO 2 atmosphere, which was mainly attributed to gasification reactions. The value obtained under N 2 atmosphere was far below 11.6% due to low CO 2 partial pressure, for it was widely recognized that the gasification reaction heavily depended on the CO 2 concentration [23][24][25]. But in fact, the value of carbon content in coal decreased in the presence of CaSO 4 under N 2 atmosphere reached 34% in this study.…”

Investigating the combustion characteristic temperature of 28 kinds of Chinese coal in oxy-fuel conditions

“…In addition, coal with a high content of fixed carbon has a high characteristic temperature, correlated with the stable carbon structure. A high characteristic temperature was observed in the coal with high ash content L.Jan [24] Nur Sena Yuzbasi [25] Qingzhao Li [26] Chang'an Wang [27] Xiangyong Huang [29] Chang'an Wang [28] Fanrui Meng [30] Ehsan Abbasi-Atibeh [31] Le Wu [32] Chunbo Wang [33] Temperature ( o C)…”

“…The temperature profiles in a furnace can be matched with those of air combustion by adjusting the operating parameters of flue gas recycle ratio and O 2 concentration [11,12,[18][19][20][21]. Table 1 under oxy-fuel condition [13,17,18,[22][23][24][25][26][27][28][29][30][31][32][33][34]. Fig.…”

Effects of CaO‐K2CO3 on combustion behavior and emission properties of SO2 and NOX during coal sludge combustion

“…In past years, there were many more investigations on using catalyst during coal combustion, and catalytic combustion was performed successfully to improve the combustion efficiency and desulfurization ratio. [1][2][3][4][5][6][7][8][9][10] However, these investigations were conducted on either desulfurization or catalytic combustion; the integrated researches on the effect of catalysts on coal combustion, pollution emission, and the fundamental reaction mechanisms are seldom researched. [11,12] Furthermore, most researches on coal combustion catalysts focus on bituminous, anthracite, lignite, and their blends.…”