Development of Highly Stable Low Ni Content Catalyst for Dry Reforming of CH₄‐Rich Feedstocks

Abstract

Highly active and coking‐resistant Ni catalysts suited for the dry reforming of CH4‐rich gases (70 vol %, e. g. biogas or sour natural gas) were prepared starting from a Mg‐rich Mg−Al hydrotalcite support precursor. Calcination at 1000 °C yields two phases, MgO and MgAl2O4 spinel. Complexation‐deposition of Ni with citric acid on the preformed support as well as lanthanum addition yields a catalyst with remarkably low carbon accumulation over 100 h on stream attributed to both high Ni dispersion and preferred interactions of Ni with MgO on MgAl2O4.

Thermodynamic assessment of the stability of bulk and nanoparticulate cobalt and nickel during dry and steam reforming of methane

“…19,31,32 Further, novel mixed-metal oxide support materials were developed to hinder the solid-state reaction of active Ni 0 nanoparticles with classical support materials, such as Al 2 O 3 , resulting in an increased stability against oxidation. 33,34 Song et al recently deliberately allowed for sintering of 2.9 nm Ni nanoparticles, supported on highly ordered single-crystals of MgO, up to an average size of 17.3 nm to obtain a heat resistant catalyst. 9 As a result, coking was signicantly suppressed as Ni 0 accumulated at the high energy step edges of the MgO crystals during the sintering process and physically blocked centres for coking.…”

Thermocatalytic Hydrogen Production Through Decomposition of Methane-A Review

“…POM is an exothermic reaction that usually gives rise to syngas and other oxygenated compounds like formaldehyde, ethylene, and many hydrocarbons ( Chao et al, 2008 ). Of all the catalysts, Ni is the most popularly used in this reaction because it is cheaply available ( Daneshmand-Jahromi et al, 2017 ; Ha et al, 2020 ). The morphologies of the spent nickel/wood char catalyst is shown in Figure 6 .…”

Mechanistic in situ insights into the formation, structural and catalytic aspects of the La2NiO4 intermediate phase in the dry reforming of methane over Ni-based perovskite catalysts

“…Despite the obvious importance, further investigations on mechanistic details, as well as knowledge-driven catalyst development are highly needed, as most catalysts on noble metal basis (e.g., Pd or Ru) are either prohibitively expensive [2,[7][8][9][10] or susceptible to coke formation [1][2][3][4][5]. The latter is especially pronounced for the highly active Ni-based systems [11,12]. Nanoparticulate Ni systems are of particular interest, as they are reported to be more resistant against coke formation [13,14].…”