Bimetallic Pt–Ni composites on ceria-doped alumina supports as catalysts in the aqueous-phase reforming of glycerol

Abstract

Adding Ni to a supported Pt catalyst for aqueous phase reforming allowed the Pt content to be reduced to one third, with a slight increase in H2 yield.

A review of catalytic aqueous-phase reforming of oxygenated hydrocarbons derived from biorefinery water fractions

“…Moreover, combination of Pt and Ni supported on alumina doped with ceria-doped (CeO 2 eAl 2 O 3 ) allowed the reduction of Pt content from 3 to 1 wt-%, and resulted in a slight increase of the hydrogen production. In addition, no substantial catalyst deactivation was observed [53].…”

Nanosized Pt-containing Al2O3 as an efficient catalyst to avoid coking and sintering in steam reforming of glycerol

“…This interpretation is consistent with the fact that other studies have shown coking in steam reforming of hydrocarbons reaction over Pt or Ni-based catalysts. 11,22,24,25 These modes denitely prove that disordered carbonaceous deposits always form on catalyst surface from C-C bond breakage of glycerol and their byproducts. In addition, the defects modes at around 610 cm À1 of Ce-based oxides 14,15 could not be detected due to its low intensity.…”

“…In order to full this, detailed studies of glycerol steam reforming using different catalysts in a xed-bed reactor have been conducted. [8][9][10][11][12][13][14][15][16] In general, one of the reasons of choice between Pt-and Ni-based catalysts is the resistance to phase transformation and tolerance against sulfur compounds, rather than their catalytic activity. Moreover, upon using steam-to-glycerol ratio in the range of 9-12 and reaction temperature at around 600-700 C, the steam reforming of glycerol is likely.…”

H2 production from aqueous-phase reforming of glycerol over Cu–Ni bimetallic catalysts supported on carbon nanotubes

“…Also, Cu increased Ni reducibility. However, the neither of these studies tested the catalysts for extended (>12 h) use, which is unfortunate because deactivation is a known problem with Ni-based catalysts for APR [15,35,40], and Cu addition has extended the lifetime of Nibased catalysts for other reactions [56]. Therefore, in this study, a number of bimetallic xCue12Ni/MWNT catalysts have been prepared and compared as the APR catalysts to monometallic 12Ni/MWNT catalyst.…”

“…Ni is an attractive substitute because it is highly active for reactions involving CeC bond breaking, such as alkane hydrogenolysis [36]; however, Ni is also a good catalyst for CO methanation [29,30,37]. Moreover, it is prone to inactivation by carbon deposition [38], which has been observed on supported Ni catalysts during APR [35,39]. Further, Ni can be oxidized under APR conditions [40].…”