Effects of inherent alkali and alkaline earth metals on nitrogen transformation during steam gasification of Shengli lignite
Panpan Zheng
Yonggang Wang
Chen Liu
Weijie Guo
Lei Bai
Xiao Hu
Xiongchao Lin
摘要：This work evaluated the effects of inherent alkali and alkaline earth metals on nitrogen transformation during steam gasification of Shengli lignite at the temperature of 873-1173 K in a fluidized-bed/fixed-bed quartz reactor.The results indicated that the alkali metal Na and alkaline earth metals Ca,Mg in coal have different effects on inherent nitrogen transformation to NH3,HCN and char-N during the lignite steam gasification.Specifically during the steam gasification of Shengli lignite,Na and Ca,Mg not only catalyze the inherent nitrogen conversions to NH3,but also promote the secondary reactions of the nascent char-N as well as the generation of NH3 from the generated HCN,meanwhile they also inhibited the inherent nitrogen conversion to HCN and char-N.The presence of Na,Ca and Mg hindered the formation of oxidized nitrogen (N-X) functional groups,but enhanced pyridinic nitrogen (N-6) and quaternary nitrogen's (N-Q) formation in char.
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资助基金：The authors gratefully acknowledge the financial support provided by the 12th Five-Year Plan of National Science and Technology Support(Grant 2012BAA04B02)the National Natural Science Foundation of China(21406261)
论文发表日期：2019-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 197-206 )
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