摘要
采用XRD、TPR、TPD、XPS和催化活性评价等技术,考察了负载型CoO催化剂的表面性质和其对CH4与CO2重整制合成气反应的催化性能.实验结果表明,碱性载体或助剂MgO和La2O3的添加能有效地改善CoO催化剂的表面结构、抗积炭能力和还原性能,CoO/MgO催化剂显示出最佳的催化反应稳定性,在750℃、GHSV=2500h-1、CH4/CO2原料比为1:1下,连续反应100h内催化剂活性较为稳定,CoO/MgO和CoO/γ-Al2O3催化剂的表面性质本质上是不相同的.
The surface properties and catalytic performance of supported CoO catalysts for CO2-reforming of CH4 to syngas are investigated by using techniques such as XRD, TPR , TPD, XPS and evaluation of catalytic activity, etc. Experimental results show that the MgO and La2O3 as basic support or promoters doped CoO catalysts can efficiently improve its surface structure, resistance to carbon deposition and reduction behavior, CoO/MgO catalyst exhibits optimal catalytic reaction stability, within, 100 hours on stream with a CH4/CO2 feed ratio of 1 ： 1 at 750℃ and GHSV equal to 2 500h^-1. The surface properties are essentially different between CoO/ MgO and COO/γ-Al2O3 catalysts.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2009年第4期351-356,共6页
Journal of Molecular Catalysis(China)
