TY - JOUR
T1 - Promoter Effects on Nickel-Supported Magnesium Oxide Catalysts for the Carbon Dioxide Reforming of Methane
AU - He, Dedong
AU - Luo, Yongming
AU - Tao, Yongwen
AU - Strezov, Vladimir
AU - Nelson, Peter
AU - Jiang, Yijiao
PY - 2017
Y1 - 2017
N2 - The nickel catalysts supported on bare MgO and its binary Mg-Al, Mg-La, and Mg-Fe metal oxides were prepared and used for carbon dioxide reforming of methane to syngas. The effects of Al, La, and Fe metal oxides on the structural properties, reducibility, and metal-support interaction of the Ni catalysts supported on MgO-based binary metal oxide were investigated. The X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H2-TPR) analyses show that the nickel nanoparticles were highly dispersed on the supports. It is found that the Al ions can be well-incorporated into the MgO lattice to form uniform Mg-Al oxides, while isolated lanthanum oxides and iron oxides were observed in the Mg-La and Mg-Fe binary systems by TEM, respectively. Ni/Mg-Al metal oxide exhibits greatly improved catalytic activity, owing to the formation of a homogeneous Mg-Al oxide matrix with small particle sizes of Ni nanoparticles compared to bare Ni/MgO. Very low conversions for both CH4 and CO2 were obtained on Ni/Mg-La and Ni/Mg-Fe metal oxides, even at a high temperature of 800°C, as a result of the incomplete reduction of the nickel nanoparticles.
AB - The nickel catalysts supported on bare MgO and its binary Mg-Al, Mg-La, and Mg-Fe metal oxides were prepared and used for carbon dioxide reforming of methane to syngas. The effects of Al, La, and Fe metal oxides on the structural properties, reducibility, and metal-support interaction of the Ni catalysts supported on MgO-based binary metal oxide were investigated. The X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H2-TPR) analyses show that the nickel nanoparticles were highly dispersed on the supports. It is found that the Al ions can be well-incorporated into the MgO lattice to form uniform Mg-Al oxides, while isolated lanthanum oxides and iron oxides were observed in the Mg-La and Mg-Fe binary systems by TEM, respectively. Ni/Mg-Al metal oxide exhibits greatly improved catalytic activity, owing to the formation of a homogeneous Mg-Al oxide matrix with small particle sizes of Ni nanoparticles compared to bare Ni/MgO. Very low conversions for both CH4 and CO2 were obtained on Ni/Mg-La and Ni/Mg-Fe metal oxides, even at a high temperature of 800°C, as a result of the incomplete reduction of the nickel nanoparticles.
UR - http://www.scopus.com/inward/record.url?scp=85017182368&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP140102432
U2 - 10.1021/acs.energyfuels.6b02361
DO - 10.1021/acs.energyfuels.6b02361
M3 - Article
AN - SCOPUS:85017182368
SN - 0887-0624
VL - 31
SP - 2353
EP - 2359
JO - Energy and Fuels
JF - Energy and Fuels
IS - 3
ER -