摘要
在低阶煤中对Na HCO3的燃烧固硫作用进行了考察,并以弱黏煤为主要研究对象,进一步考察了不同Na HCO3添加量及燃烧温度下弱黏煤的燃烧固硫率,并对Na HCO3的固硫机理进行了分析和讨论。研究发现,Na HCO3的最适固硫温度为900℃,且随着Na/S比的增大,燃烧固硫率逐渐提高,当Na/S比为2.0时,燃烧固硫率和Na基固硫剂利用率分别为90.57%和65.83%,效果最好。结合XRD和TG-MS表征分析表明,Na HCO3固硫机制的反应历程为Na HCO3→Na2CO3→Na2SO3→Na2SO4。
This study investigated NaHCO_3 effects on combustion sulfur retention in low rank coal. The sulfur fixation efficiency of NaHCO_3 in weakly caking coal under different conditions was studied and the mechanism was analyzed. The results show that the optimal sulfur-fixing temperature of NaHCO_3 is 900 ℃, and the combustion sulfur-fixing rate gradually increases with the increase of Na/S ratio. When the Na/S is 2, the rate of sulfur-fixing and the utilization rate of Na based sorbents are 90.57% and 65.83%, respectively. Further XRD and TG-MS characterization show that the sulfur fixation process of NaHCO_3 is NaHCO_3→Na_2CO_3→Na_2SO_3→Na_2SO_4.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2018年第1期241-246,共6页
Journal of Chemical Engineering of Chinese Universities
基金
太原市科技计划项目(160302)
山西省专利推广实施资助专项(20171037)
关键词
低阶煤
弱黏煤
碳酸氢钠
固硫
机理
low rank coals
weakly caking coal
sodium bicarbonate
sulfur fixation
mechanism
