A novel synthesis of NiAl2O4 spinel from a Ni-Al mixed-metal alkoxide as a highly efficient catalyst for hydrogen production by glycerol steam reforming

Stability and activity maintenance of Ni catalysts supported on La‐, Ce‐, and Mg‐promoted Al 2 O 3 and ZrO 2 for H 2 production from steam reforming of glycerol

“…Thyssen et al 47 3 could be due the in-situ activation of the surface Ni by the produced H 2 , which is also observed in relevant literatures. 11,18,48 The three Al 2 O 3 -supported Ni catalyst beds attained very similar average gas molar fraction and H 2 selectivity as Table 1…”

“…Therefore, considerable research has focused on screening suitable supports and promoters for Ni or modifying the catalyst preparation method, trying to overcome these obstacles. Studied carriers for active Ni mainly include single metal oxide such as Al 2 O 3, [6][7][8][9][10][11] and carbon material such as CNT, 30,40,41 activated biochar, 42 and graphene oxide. 43,44 Al 2 O 3 -supported Ni catalysts have received the most extensive study as stated above because the porous γ-Al 2 O 3 with high surface area is very beneficial to form highly dispersed Ni crystals over the catalyst surface, thus achieving a high level of activity for SR reaction.…”

“…41,42 Further modifications including adding promoters or optimizing the preparation method for Ni/Al 2 O 3 and Ni/ZrO 2 catalysts have been widely carried out for SR reactions. Kamonsuangkasem et al 18 24,26,45,46 For catalyst preparation, besides the most used impregnation method, sol-gel, 18 co-precipitation, 27 and more complex solvothermal method 11 have been investigated.…”

The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol

“…As a result, numerous efforts at identifying the most appropriate catalytic systems have been carried out, with the majority of reports focusing on the development of Ni catalysts based on a variety of different metal oxides (e.g., Al 2 O 3 , SiO 2 , La 2 O 3 , CeO 2 , ZrO 2 ) and/or the use of transition metals (e.g., ZrO 2 , Co, Cu), lanthanide metals (e.g., La, Ce) or alkaline earth metals (e.g., Ca, MgO, Ba) as modifiers in the supports. The exegesis for the focus on Ni lies with the fact that it is a widely available metal (thus, inexpensive) and also that it shows very high intrinsic activity when well dispersed on to the support [27][28][29][30][31][32][33][34][35][36]. Moreover, Ni promotes the cleavage of C-C, O-H, and C-H bonds (in the order of O-H, -CH 2 -, C-C, -CH 3 ) [22], as well as dehydrogenation and hydrogenation [27,28].…”

“…Moreover, Ni promotes the cleavage of C-C, O-H, and C-H bonds (in the order of O-H, -CH 2 -, C-C, -CH 3 ) [22], as well as dehydrogenation and hydrogenation [27,28]. However, despite the reporting of some very promising results [30][31][32][33][34][35], at high temperatures, Ni-based catalysts are also susceptible to carbon deposition and metal particle sintering, which unavoidably leads to their eventual deactivation [36,37].…”