X-ZrO2 addition (X = Ce, La, Y and Sm) on Ni/MgAl2O4 applied to methane tri-reforming for syngas production

Author(s)

Paladino Lino, Ananda Vallezi ^[1] ; Assaf, Elisabete Moreira ^[2] ; Assaf, Jose Mansur ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Engn Quim, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF CO2 UTILIZATION; v. 33, p. 273-283, OCT 2019.
• Web of Science Citations: 0

Abstract

Nickel supported on MgAl2O4 spinel (Ni/MA) and the effects of X-ZrO2 (X = Ce, La, Sm and Y) addition to the support were studied in Methane Tri-Reforming (MTR) process. The characterization techniques employed were XRD, B.E.T., H-2-TPR, H-2-TPD, CO2-TPD, XPS, and in situ XANES. The presence of lanthanides and Y associated to ZrO2 modified the Ni-0 dispersion and the surface basicity. These properties influence the coke formation, which increased as the metallic dispersion diminished. Ce-ZrO2 association on the spinel support led to the greatest catalytic performance, increasing reactants conversions due to its adequate base properties that allowed the adsorption of new reactants molecules due to coke elimination, associated to its smallest apparent Ni-0 average size. Moreover, the Ce-Zr support favored the NiO activation, without compromising the nickel dispersion. (AU)

• FAPESP's process: 14/25972-8 - Catalysts based on Ni/(CeZr)O2-MgAl2O4 and Ni/(X2O3 + ZrO2)-MgAl2O4 (X = la, SM, Y) applied to methane tri-reforming to production of hydrogen and synthesis gas
• Grantee: Ananda Vallezi Paladino Lino
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Applied Research Centers Program