化工学报 ›› 2020, Vol. 71 ›› Issue (12): 5568-5577.DOI: 10.11949/0438-1157.20200655

• 催化、动力学与反应器 • 上一篇    下一篇

油页岩矿物质催化半焦燃烧特性及机理

高鹤1(),姜星宇1,刘雪景1,岳君容2,曾玺2,韩振南1(),许光文1,2()   

  1. 1.沈阳化工大学能源与化工产业技术研究院,资源化工与材料教育部重点实验室,辽宁 沈阳 110142
    2.中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190
  • 收稿日期:2020-05-27 修回日期:2020-07-16 出版日期:2020-12-05 发布日期:2020-12-05
  • 通讯作者: 韩振南,许光文
  • 作者简介:高鹤(1994—),男,硕士研究生,he.gao@studio.unibo.it
  • 基金资助:
    国家自然科学基金项目(U1903130);国家重点研发计划项目(2018YFF01011402)

Characteristics and mechanism of catalytic effect of inner minerals on combustion of oil shale coke

GAO He1(),JIANG Xingyu1,LIU Xuejing1,YUE Junrong2,ZENG Xi2,HAN Zhennan1(),XU Guangwen1,2()   

  1. 1.Institute of Industrial Chemistry and Energy Technology, Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, China
    2.State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-05-27 Revised:2020-07-16 Online:2020-12-05 Published:2020-12-05
  • Contact: HAN Zhennan,XU Guangwen

摘要:

利用微型流化床反应分析仪(MFBRA)研究了油页岩矿物质催化半焦燃烧特性,重点考察了半焦内部矿物质和外部页岩灰床料对半焦燃烧的催化作用,揭示了流化床反应器中半焦燃烧过程和机理。结果表明:内部矿物质和外部床料对半焦燃烧均具有明显催化作用,而两者共同催化效果最为显著。矿物质中CaO和Fe2O3对半焦燃烧具有催化活性,CaO催化作用强于Fe2O3。油页岩半焦燃烧反应活化能在60.41~78.97 kJ/mol之间,矿物质的催化作用会明显降低反应活化能。流化床反应器中,矿物质对半焦燃烧的催化作用主要表现在四个反应,即:挥发分裂解和燃烧、半焦表面炭燃烧、半焦内部炭燃烧以及一氧化碳燃烧。

关键词: 微型流化床, 油页岩, 半焦燃烧, 矿物质, 催化

Abstract:

The micro fluidized bed reaction analyzer (MFBRA) was used to study the combustion characteristics of oil shale mineral catalytic semi-coke. This study compared the effect of minerals inside char and bed material (oil shale ash) outside char on char combustion, and the process and mechanism of char combustion in the fluidized bed were further revealed. Both of minerals inside char and bed material outside char had a marked catalysis for char combustion and their combined catalysis was most notable. It is found that the CaO and Fe2O3 were the major active components in oil shale minerals for catalytic combustion of char, and the catalysis of CaO was stronger than that of Fe2O3. The activation energy of char combustion ranged from 60.41 kJ/mol to 78.97 kJ/mol, and it would significantly decrease with presence of the catalysis by minerals in oil shale. For char combustion in a fluidized bed, the contribution of minerals to catalytic combustion was mainly reflected in four reactions, such as volatiles cracking and combustion, surface carbon combustion, internal carbon combustion and CO combustion.

Key words: micro fluidized bed, oil shale, char combustion, minerals, catalysis

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