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首页> 外文期刊>Combustion Science and Technology >Self-sustained CO Combustion Induced by CuCe_(0.75)Zr_(0.25)O_y Catalysts with Different Pore-forming Methods
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Self-sustained CO Combustion Induced by CuCe_(0.75)Zr_(0.25)O_y Catalysts with Different Pore-forming Methods

机译：由不同孔形成方法的Cuce_（0.75）Zr_（0.25）O_y催化剂诱导的自持CO燃烧

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摘要

CO self-sustaining combustion, induced by a CuCe0.75Zr0.25Oy catalyst, has been confirmed experimentally as an effective strategy to reduce serious environmental pollution and energy waste, which is caused by direct combustion of conventional converter gas in the steelmaking industry. In this paper, the effects of CuCe0.75Zr0.25Oy catalysts prepared by a sol-gel method via three different pore-forming agents (oxalic acid, cellulose and thermal decomposition) were investigated for their catalytic activity of self-sustained CO combustion. Additionally, characterization methods were used to obtain the structural properties of each catalyst. The results obtained show that the CuCe0.75Zr0.25Oy catalyst, as a sol-gel pore-forming agent, prepared from cellulose exhibits the highest activity among the three catalysts. Under the condition of a reaction gas (3% CO+5% O-2/N-2), the T-10 (70 degrees C), T-50 (73 degrees C) and T-90 (78 degrees C) of the cellulose catalyst are obviously lower than those of the other catalysts, where T-10, T-50 and T-90 denote the reaction temperature corresponding to the CO conversion of 10%, 50% and 90%, respectively. The reason is that the cellulose pore-forming agent promotes the formation of a multistage porous structure, which strengthens the synergistic effect between the Cu and Ce catalysts and changes the redox property of the overall catalyst. On the one hand, the strong synergy between CuO and CeO2 adjusts the dispersion and chemical state of copper nanoparticles. On the other hand, the oxygen vacancies generated locate at the copper-cerium interface enhance the ability of oxygen storage and oxygen release of the catalyst.
机译：Cuce0.75zR0.25oy催化剂诱导的CO自持燃烧已被实验证实，作为减少严重环境污染和能量废物的有效策略，这是由炼钢行业中传统转换器气体的直接燃烧引起的。本文研究了通过三种不同孔形成剂（草酸，纤维素，热分解的溶胶 - 凝胶法制备的Cuce0.75Zr0.25oy催化剂的影响，用于其催化活性的自持CO燃烧。另外，使用表征方法来获得每种催化剂的结构性质。得到的结果表明，由纤维素制备的溶胶 - 凝胶孔形成剂的Cuce0.75Zr0.25oy催化剂在三种催化剂中表现出最高的活性。在反应气体（3％CO + 5％O-2 / N-2）的条件下，T-10（70℃），T-50（73℃）和T-90（78℃）纤维素催化剂明显低于其他催化剂的催化剂，其中T-10，T-50和T-90表示对应于10％，50％和90％的CO转化的反应温度。原因是纤维素孔形成剂促进了多级多孔结构的形成，其增强了Cu和Ce催化剂之间的协同效应，并改变了整个催化剂的氧化还原性能。一方面，CuO和CeO2之间的强大协同作用调整了铜纳米粒子的分散和化学状态。另一方面，在铜 - 铈界面处产生的氧空位增强了氧气储存和催化剂的氧释放能力。

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  • 来源
    《Combustion Science and Technology》 |2021年第12期|2045-2057|共13页
  • 作者

    He Junyao; Kang Running; Zhang Qing; Wei Xiaolin; Dou Baojuan; Bin Feng;

  • 作者单位

    Chinese Acad Sci State Key Lab High Temp Gas Dynam Inst Mech Beijing 100190 Peoples R China|Xi'an Jiaotong Univ Sch Energy & Power Engn Xian Peoples R China;

    Chinese Acad Sci State Key Lab High Temp Gas Dynam Inst Mech Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Engn Sci Beijing Peoples R China;

    Tianjin Univ Sci & Technol Coll Chem Engn & Mat Sci Tianjin Peoples R China;

    Chinese Acad Sci State Key Lab High Temp Gas Dynam Inst Mech Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Engn Sci Beijing Peoples R China;

    Tianjin Univ Sci & Technol Coll Chem Engn & Mat Sci Tianjin Peoples R China;

    Chinese Acad Sci State Key Lab High Temp Gas Dynam Inst Mech Beijing 100190 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    CuCe0; 75Zr0; 25O(y) catalyst; carbon monoxide; self-sustained combustion; pore-forming way;

    机译：cuce0;75zr0;250（y）催化剂;一氧化碳;自我持续燃烧;孔形成的方式;

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