Enhanced activity of Ni/SiO2 catalyst in dry reforming of CH4 via a modified impregnation method

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Li, Chao^1 ; Yang, Chenyin^1 ; Xu, Yan^1 ; Du, Xihua^1

School of Chemistry and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu

221018, China^1

关键词: Catalyst preparation;    Catalytic performance;    Dry reforming;    Impregnation methods;    Metal-support interactions;    Modified impregnation method;    Ni/SiO2 catalysts;    Structure and performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/3/032001/pdf
DOI  :  10.1088/1755-1315/189/3/032001

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

A modified impregnation method with the addition of NH4NO3 was employed to prepared the supported Ni catalyst (denoted as Ni/SiO2-N). And the obtained catalyst exhibited an improved catalytic activity and stability in DRM at 800°C with GHSV of 48 L⋅gcat.-1⋅h-1 and CH4/CO2/N2 = 9/9/2. The XRD and H2-TPR results showed that the Ni/SiO2-N catalyst was possessed with smaller Ni particles and stronger metal-support interaction than Ni/SiO2 catalyst prepared by the common impregnation method, leading to the better catalytic performance. It is the decomposition of NH4NO3 which can generate extra heat in a short time during the catalyst preparation process that make the change in structure and performance of catalyst.