Efficient CO 2 -regeneration of Ni/Y 2 O 3 La 2 O 3 ZrO 2 systems used in the ethanol steam reforming for hydrogen production

Regeneration of catalysts deactivated by coke deposition: A review

“…4). Bednarczuk et al [97,98] reported that the coke deposited on deactivated ethanol steam reforming Ni catalysts (with Al2O3, MgO, Y2O3, La2O3 and ZrO2 supports) might be partly removed by CO2 gasification, accompanied by a partial recovery of catalyst activity.…”

Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil

“…Moreover, the regeneration of the catalysts has attracted great attention due to its importance for the economic viability of the reforming processes. In the SR of CH 4 and hydrocarbons, the removal of coke is carried out by combustion or gasification [17,[24][25][26], and the elimination of sulfur by steam treatment at high temperature (700-800 ºC) [11][12][13][14]. Although coke or sulfur removal strategies have been widely studied, the real challenge is to achieve the reactivation of the catalyst subsequent to these regeneration treatments.…”

Synthesis and Study of Structural Properties of Composites Based on Ni-Ru for Steam Conversion of Ethanol

“…Surface promotion of the support by rare-earth elements inhibits the growth of nickel crystallites, preventing the formation of large particles necessary for the formation of coke, and also complicates the reoxidation of metallic nickel during the reaction [16,17,18,19] Complex oxides with a perovskite structure in addition to high oxygen mobility have a number of additional unique properties. Due to this, they are sometimes called "replacement of noble metals" in the application to catalysis [20].…”