Catalytic performance of Samarium-modified Ni catalysts over Al2O3-CaO support for dry reforming of methane

被引：33
|
作者：
Taherian, Zahra [1 ]
Gharahshiran, Vahid Shahed [1 ]
Fazlikhani, Fatemeh [1 ]
Yousefpour, Mardali [1 ]
机构：
[1] Semnan Univ, Fac Met & Mat Engn, Semnan Damghan Rd, Semnan 19111, Iran
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 10期
关键词：
Methane dry reforming; Modified alumina; Calcina; Samarium promoter; Nickel catalyst;
D O I：
10.1016/j.ijhydene.2020.11.196
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Mesoporous calcina-modified alumina (Al2O3-CaO) support was produced through the simple and economical co-precipitation method, then nickel (Ni, 10 wt%) and samarium (Sm, 3 wt%) ions loaded by two-solvent impregnation and one-pot strategies. The unpromoted/samarium-promoted catalysts were evaluated using X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HR-TEM), nitrogen adsorption-desorption, Temperature Programmed Oxidation/Reduction (TPR/TPO), and Field Emission Electron Scanning Microscopy (FE-SEM) methods, then investigated in methane dry reforming. The results revealed that with adding samarium to Ni catalyst through impregnation method, the average Ni crystallite size and specific surface area decreased from 11.5 to 5.75 nm and from 76.08 to 30.9 m(2)/g, respectively; as a result, the catalytic activity increased from about 50% to 68% at 700 degrees C. Furthermore, the TPO and FE-SEM tests indicated the formation of carbon with nanotube nature on the catalyst surface. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：7254 / 7262
页数：9
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