Citation: GE Hui-jun, SHEN Lai-hong, GU Hai-ming, SONG Tao, JIANG Shou-xi. Characteristics of Zhundong coal in chemical looping combustion with natural hematite as oxygen carrier[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(02): 184-191. shu

Characteristics of Zhundong coal in chemical looping combustion with natural hematite as oxygen carrier

1.
Southeast University, Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Nanjing 210096, China

Corresponding author: SHEN Lai-hong,
Received Date: 14 September 2015
Available Online: 16 November 2015
Fund Project: 国家自然科学基金(51276037,51406035,51476029) (51276037,51406035,51476029)东南大学优秀博士学位论文基金(YBJJ1544) (YBJJ1544)江苏省高等学校研究生创新计划(KYLX15_0065)项目资助. (KYLX15_0065)

The characteristics of high-sodium Zhundong coal in chemical looping combustion(CLC) as well as the migration of sodium upon combustion were investigated in a fluidized-bed reactor with natural hematite as the oxygen carrier,in order to mitigate the severe slagging and fouling problems and enhance the utilization efficiency of Zhundong coal.The results indicated that the carbon conversion and reaction rate for Zhundong coal in CLC were evidently higher than those of other coals at 850-1 000℃;aluminosilicate Na₂O·Al₂O₃·6SiO₂ of high melting point is formed in the CLC process,which is effective to mitigate the severe slagging and fouling problems.During a 10-cycle CLC test,the reactivity of hematite increases with the increase of cycle number,whereas the sodium content in the CLC fly ash is reduced.
- Zhundong coal,
- chemical looping combustion,
- slagging and fouling,
- high sodium coal,
- natural hematite,
- oxygen carrier
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