Syngas production from reforming of methane with CO2 and O2 over Ni/SrO–SiO2 catalysts in a fluidized bed reactor
Syngas production from reforming of methane with CO2 and O2 over Ni/SrO–SiO2 catalysts in a fluidized bed reactor
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DOI：
10.1016/j.ijhydene.2004.01.012
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发表时间：
2004-09
影响因子：
7.2
通讯作者：
Q. Jing;H. Lou;Jin-hua Fei;Z. Hou;Xiaoming Zheng
中科院分区：
文献类型：
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作者：
Q. Jing;H. Lou;Jin-hua Fei;Z. Hou;Xiaoming Zheng
制备了负载不同量SrO改性sio2的镍催化剂，并在流化床反应器中用于甲烷的联合干重整和部分氧化反应。在不同温度、空速和原料气组成条件下研究了该反应。结果表明，镍与载体的相互作用对镍活性相的结构有很大的影响，而这种影响与载体的性能、助剂和制备方法有关。采用XRD、TPR、CO2-TPD和TEM等技术对催化剂进行了表征。Ni烧结是纯Ni/ sio2催化剂失活的主要原因，而Ni在10% Sr促进的Ni/ sro - sio2催化剂上高度分散。镍与sro促进载体之间的相互作用增强可能是其具有高活性和良好的抗镍颗粒团聚性的原因。
Nickel catalysts supported on different amounts of SrO modified SiO2were prepared and used in combined dry reforming and partial oxidation of methane in a fluidized bed reactor. This reaction was investigated under different temperatures, space velocities and feed gas composition. Results showed that the structure of the nickel active phase strongly depended on the interaction between Ni and the support, which was related to the support properties, the additives and the preparation methods. The catalysts were characterized using XRD, TPR, CO2-TPD and TEM techniques. Ni sintering was a major reason for the deactivation of pure Ni/SiO2catalysts, while Ni dispersed highly on a 10 wt % Sr promoted Ni/SrO–SiO2catalyst. The enhanced interaction between Ni species and SrO-promoted support might be responsible for its high activity and good resistance to agglomeration of the nickel particles.