石油学报(石油加工) ›› 2020, Vol. 36 ›› Issue (6): 1129-1139.doi: 10.3969/j.issn.1001-8719.2020.06.003

• 化学链燃烧 • 上一篇    下一篇

部分氧解耦煤化学链燃烧中硫的演化与分布

王保文,李贺宇,王维,蔡中元,姜涛,梁彦琛   

  1. 华北水利水电大学 电力学院,河南 郑州 450045
  • 收稿日期:2020-05-21 修回日期:2020-07-19 出版日期:2020-11-25 发布日期:2020-12-02
  • 通讯作者: 王保文,男,副教授,博士,从事煤燃烧污染物控制研究,E-mail:david-wn@163.com E-mail:david-wn@163.com
  • 基金资助:

    国家自然科学基金项目(51776073),河南省科技攻关项目(162102210233),华北水利水电大学创新科技项目(2019XA014)资助

Evolution and Distribution of Sulfur in Chemical Looping Combustion With Partial Oxygen Uncoupling of Coal

WANG Baowen, LI Heyu, WANG Wei, CAI Zhongyuan, JIANG Tao, LIANG Yanchen   

  1.  College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
  • Received:2020-05-21 Revised:2020-07-19 Online:2020-11-25 Published:2020-12-02
  • Supported by:
     

摘要:

在实验室高温固定床反应器上,以富含黄铁矿硫的六枝煤为燃料,研究其与CuFe2O4复合载氧体在部分氧解耦化学链燃烧(CLPOU)过程中气、固相硫的演化及分布,并进一步考察反应温度、载氧体过量系数及CO2反应气氛对硫迁移转化的影响。结果表明,无论在程序升温实验或等温实验中,反应器出口气相硫仅为SO2,而固相硫组分以Cu2S为主。提高反应温度和载氧体过量系数会促进煤中硫的氧化,导致更多气相SO2的释放;而CO2反应气氛则在一定程度上抑制SO2的产生。鉴于CuFe2O4复合载氧体的高反应活性和Cu基氧化物的良好固硫特性,CuFe2O4载氧体有望实现煤化学链燃烧过程中碳、硫组分的协同在线控制。

关键词: 煤, 碳捕集, 部分氧解耦化学链燃烧, 硫演化及分布, 协同脱硫脱碳

Abstract:

Evolution and distribution of gaseous and solid sulfur during the chemical looping combustion under partial oxygen uncoupling (CLPOU) of Liuzhi coal with CuFe2O4 oxygen carrier were studied in the high-temperature fixed bed reactor, and effects of reaction temperature, oxygen carrier added amount and CO2 atmosphere on sulfur migration and transformation were further investigated. The results show that in the temperature programmed experiment as well as the isothermal experiment, the identifiable gaseous sulfur at the outlet is only SO2, while the solid sulfur is mainly determined as Cu2S. Moreover, increase of reaction temperature and addition of oxygen carrier promote the oxidation of sulfur in coal, which leads to the release of more gaseous SO2; while the CO2 atmosphere inhibits the generation of SO2. Due to the high reactivity of the combined oxygen carrier and the excellent sulfur fixation characteristics of Cu-based oxides, the CuFe2O4 oxygen carrier is expected to achieve in-situ simultaneous decarbonization and desulfurization in the process of coal-fueled chemical looping combustion.

Key words: coal, carbon capture, Chemical Looping combustion under partial oxygen uncoupling (CLPOU), sulfur evolution and distribution, simultaneous decarbonization and desulfurization

中图分类号: