物理化学学报 >> 2009, Vol. 25 >> Issue (04): 762-766.doi: 10.3866/PKU.WHXB200904231

研究论文 上一篇    下一篇

NiO/MgxSi1-xOy催化剂的制备及其在高温焦炉煤气中焦油组分催化裂解中的应用

李雪玲 岳宝华 汪学广 于飞 孔令华 鲁雄刚 丁伟中   

  1. 上海大学上海市现代冶金与材料制备重点实验室, 上海 200072; 上海大学理学院化学系, 上海 200444; 上海大学纳米科学与技术研究中心, 上海 200072
  • 收稿日期:2008-11-25 修回日期:2009-01-05 发布日期:2009-03-31
  • 通讯作者: 汪学广 丁伟中 E-mail:wxg228@shu.edu.cn;wzhding@shu.edu.cn

Preparation of NiO/MgxSi1-xOy Catalysts and Their Application in Catalytic Cracking of Tar Components in Hot Coke Oven Gas

LI Xue-Ling, YUE Bao-Hua, WANG Xue-Guang, YU Fei, KONG Ling-Hua, LU Xiong-Gang, DING Wei-Zhong   

  1. Shanghai Key Laboratory of Modern Metallurgy and Material Processing, Shanghai University, Shanghai 200072, P. R. China; Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China; Research Center of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200072, P. R. China
  • Received:2008-11-25 Revised:2009-01-05 Published:2009-03-31
  • Contact: WANG Xue-Guang, DING Wei-Zhong E-mail:wxg228@shu.edu.cn;wzhding@shu.edu.cn

摘要: 采用溶胶-凝胶法制备了MgO和SiO2的二元复合氧化物载体, 通过浸渍法制得NiO/MgxSi1-xOy催化剂, 并使用Brunauer-Emmett-Teller(BET)吸附、载射线衍射(XRD)、透射电子显微镜(TEM)等对其进行表征. 以甲苯和萘的混合物作为高温焦炉煤气中焦油组分的模型化合物, 在固定床反应器中进行高温焦炉煤气中焦油组分催化裂解的研究. 结果表明, 催化剂的焙烧温度、反应空速以及载体中Mg和Si的原子比对反应活性有很大的影响. 在反应温度800 益、水碳摩尔比为0.7的条件下, 10%(w)NiO/Mg0.80Si0.20Oy催化剂能将甲苯和萘完全转化为CO、CH4等小分子气体, 显示出很好的催化活性、稳定性以及好的抗积炭性能.

关键词: 二氧化硅, 氧化镁, 镍催化剂, 催化裂解, 焦油

Abstract: NiO/MgxSi1 -xOy catalysts were prepared by incipient wetness impregnation with MgxSi1 -xOy supports synthesized by the sol-gel method. These catalysts were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD) and transmission electron microscope (TEM). The catalytic activity of NiO/MgxSi1-xOy catalysts was evaluated in a fixed-bed reactor via the catalytic cracking of toluene and naphthalene as model tar compounds in hot coke oven gas (COG). The results showed that the calcination temperature of the catalysts, reaction space velocity and Mg/Si atomic ratio greatly influenced the reaction activity of the catalysts. 10%(w) NiO/Mg0.80Si0.20Oy could fully convert toluene and naphthalene into light fuel gases such as CO and CH4, showing good catalytic activity, stability and resistance to coke deposition.

Key words: SiO2, MgO, Ni catalyst, Catalytic cracking, Tar

MSC2000: 

  • O643