石油学报(石油加工) ›› 2020, Vol. 36 ›› Issue (4): 777-783.doi: 10.3969/j.issn.1001-8719.2020.04.015

• 研究报告 • 上一篇    下一篇

化学链气化过程中CuFe2O4/SiO2载氧体的反应性能及次烟煤的结构演变

安梅,潘鑫,胡修德,马晶晶,郭庆杰   

  1. 宁夏大学 省部共建煤炭高效利用与绿色化工国家重点实验室, 宁夏 银川 750021
  • 收稿日期:2019-05-17 修回日期:2019-08-27 出版日期:2020-07-25 发布日期:2020-09-23
  • 通讯作者: 郭庆杰,男,教授,博士,从事煤炭清洁利用方面的研究,E-mail: qj_guo@yahoo.com E-mail:qjguo@qust.edu.cn
  • 作者简介:第一作者:安梅,女,博士研究生,从事煤炭清洁利用方面的研究
  • 基金资助:
    国家重点研发计划项目(2018YFB0605401), 宁夏自然科学基金资助项目(2020AAC03020),宁夏回族自治区重点研发计划(重大科技)项目(2018BCE01002),国家自然科学基金地区项目(21868025)

 Reaction Characteristics and Structural Evolution of Coal With Oxygen Carriers CuFe2O4/SiO2 in Chemical-Looping Gasification Process

 AN Mei, PAN Xin, HU Xiude, MA Jingjing, GUO Qingjie   

  1.  State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2019-05-17 Revised:2019-08-27 Online:2020-07-25 Published:2020-09-23
  • Supported by:
     

摘要: 以CuFe2O4/SiO2为载氧体,次烟煤为燃料,在间歇流化床中进行次烟煤的化学链气化实验,通过X射线衍射和拉曼光谱分析了化学链气化过程中CuFe2O4/SiO2载氧体和次烟煤的结构演变规律。结果表明:与以SiO2为床料的次烟煤气化相比,CuFe2O4/SiO2载氧体的加入使得次烟煤化学链气化的最大碳转化速率提高了43%。这是因为在化学链气化过程中,CuFe2O4/SiO2载氧体会释放分子氧和传递晶格氧,而分子氧会促进次烟煤中大芳香环的裂解,晶格氧会加快次烟煤中小芳香环的消耗。

关键词: 化学链, 气化, 合成气, CuFe2O4/SiO2载氧体

Abstract:

Reaction characteristics in chemical-looping gasification of sub-bituminous were studied with using CuFe2O4/SiO2 as oxygen carriers and a batch fluidized bed. Structural evolution of oxygen carriers CuFe2O4/SiO2 and sub-bituminous coal during chemical looping gasification were analyzed by X-ray diffraction and Raman spectrum. Experimental results indicate that, compared with SiO2, maximum carbon transformation rate of sub-bituminous increases 43% after adding CuFe2O4/SiO2 oxygen carriers because oxygen carriers CuFe2O4/SiO2 can release O.2 molecules and transfer lattice oxygen in chemical-looping gasification process. The released O.2 can promote cracking of large aromatic rings, and the lattice oxygen can consume small aromatic rings.

Key words:  chemical-looping, gasification, syngas; CuFe2O4/SiO2 oxygen carrier

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