Promoting effect of Ce and Pr in Co catalysts for hydrogen production via oxidative steam reforming of ethanol

Hydrogen production by steam reforming of methanol by Cu–Zn/CeAlO3 perovskite

“…61 Although the effect of Cu in SRM, is well documented, the presence of Ce and Cu aids in enhancing the H 2 yield, lowering CO, and coking. 42,62 The reaction mechanism and formation of by-products are profoundly influenced by the interaction of Cu–ZnO. 63 The metals dispersion, methanol conversion, and reducibility of Cu 2+ species are all improved when Zn is added.…”

Preparation, modification and development of Ni-based catalysts for catalytic reforming of tar produced from biomass gasification

“…were extensively used for steam reforming of tar [180][181][182][183]. The addition of REOs to Ni-based catalysts lead to the improvement of metallic dispersion, the increase of redox properties, the minimization of metal sintering and the enhancement of the resistance to carbon deposition and sulfur poisoning [181][182][183][184][185]. These behaviors could be attributed to the enhanced generation of oxygen vacancies in doped REOs [181,186].…”

“…The higher activity of CeO 2 in steam reforming reactions can be attributed to the outstanding redox characteristics of high oxygen transfer capability and oxygen storage capacity [102,[187][188][189]. Muñoz et al [179,185] showed that the introduction of redox promoters, such as Ce and Pr, improved the reducibility, basicity (in terms of strength) and oxygen mobility of the Ni-Co catalysts. As a consequence, the carbon gasification and WGS reaction were promoted by the addition of REOs.…”

Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

“…For Co oxides derived from hydrotalcite precursors, the reduction processes occur at low temperatures (<500 °C) and high temperatures (>700 °C) [38]. The reduction at T < 500 °C is attributed to the reduction of Co oxide to Co metal, Co3O4→CoO→Co, and reduction processes at high temperatures are associated with the presence of Co-Al-type or species with strong interactions within the solid solution [39,40].…”