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›› 2010, Vol. 10 ›› Issue (4): 726-731.

• 过程与工艺 • 上一篇    下一篇

预煅烧铜渣对生物质催化热解动力学的影响

赵鲁梅 胡建杭 王华 刘慧利 卿山 李磊   

  1. 昆明理工大学冶金与能源工程学院 昆明理工大学工业节能与能源新技术云南省高校工程研究中心 昆明理工大学材料与冶金工程学院 昆明理工大学材料与冶金工程学院 昆明理工大学材料与冶金工程学院
  • 收稿日期:2010-05-13 修回日期:2010-07-27 出版日期:2010-08-20 发布日期:2010-08-20
  • 通讯作者: 赵鲁梅

Influence of Pre-calcined Copper-containing Slag on Catalytic Pyrolysis Kinetics of Biomass

ZHAO Lu-mei HU Jian-hang WANG Hua LIU Hui-li QING Shan LI Lei   

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Province Engineering Research Centre of Industrial Energy Conservation and New Energy Technology, Kunming University of Science and Technology College of Material and Metallurgy Engineering, Kunming University of Science and Technology College of Material and Metallurgy Engineering, Kunming University of Science and Technology College of Material and Metallurgy Engineering, Kunming University of Science and Technology
  • Received:2010-05-13 Revised:2010-07-27 Online:2010-08-20 Published:2010-08-20
  • Contact: ZHAO Lu-mei

摘要: 采用热重分析仪考察了预煅烧铜渣对生物质催化热解动力学的影响. 结果表明,催化剂的使用可明显降低生物质热解的活化能;随煅烧温度提高和1000℃下煅烧时间延长,催化剂活性先增强后减弱. 不同预煅烧条件下铜渣矿物的表征显示,由于Fe2SiO4、硫化物和磷化合物的氧化,铜渣质量先增加后降低;预煅烧使Fe从铜渣的Fe2SiO4中脱出,以Fe3O4和a-Fe2O3形式存在;随煅烧温度提高,Fe2SiO4的特征峰逐渐减弱直至消失,Fe3O4先增强后减弱,a-Fe2O3增强. 由此推断,Fe3O4的形成是预煅烧铜渣催化活性提高的原因.

关键词: 生物质, 催化热解, 铜渣, 预煅烧, 动力学

Abstract: The effects of pre-calcined copper-containing slag on catalytic pyrolysis kinetics of biomass were investigated by a thermogravimetric analyzer. The results indicate that activation energy of biomass pyrolysis is reduced by using untreated and precalcined copper slag. Catalytic activity of the slag catalyst increases first and then decreases with the increase of calcination temperature and the prolongation of time at 1000℃. The mineralogical characterization of copper slag under different conditions was conducted with TG, XRD, and SEM/EDX. The analysis shows that the initial increase and later decrease of copper slag activity are caused by the oxidation of fayalite, sulfide and phosphorous compounds. The formation of Fe3O4 and a-Fe2O3 is due to the extrusion of iron from the fayalite in copper slag during pre-calcination, severe segregation of iron is found to be non-uniform. The characteristic peaks of fayalite is gradually weakened and then disappears, the characteristic peaks of hematite increased, while the characteristic peaks of magnetite present a trend that first increases and then decreases. The increase of catalytic activity of pre-calcined copper slag is due to the formation of Fe3O4.

Key words: biomass, catalytic pyrolysis, copper slag, pre-calcination, kinetics

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