Active phases and reaction performance of Mo improved Ni/Al2O3 catalysts for thioetherification

The steam reforming of guaiacol for hydrogen via Ni/Al 2 O 3 : The influence of dispersion

“…This also indicates that Cop can enhance the binding of the active metal to the carrier. After the addition of PEG, the γ‐NiO peak in the catalyst prepared by Cop with PEG added (Cop‐PEG‐Ni/Al 2 O 3 ) is further enhanced, indicating that PEG can further promote the dispersion of the substance to achieve better binding of the active metal to the carrier . It is also worth noting that both Cop‐Ni/Al 2 O 3 and Cop‐PEG‐Ni/Al 2 O 3 exhibit a slight reduction peak at around 230°C, mainly composed of α‐NiO, which may be the reduction of NiO particles partially scattered on the surface .…”

“…The guaiacol conversion of Cop‐PEG‐Ni/Al 2 O 3 showed the highest, because the structure of Cop‐PEG‐Ni/Al 2 O 3 is superior to the others. For conventional catalysts, the activity of steam reforming depends not only on the active site of the support, but also on the structure of the support . Al 2 O 3 can participate in the steam reforming reactions by dissociating water into ions.…”

“…The Imp‐Ni/Al 2 O 3 catalysts were prepared by impregnation . Al 2 O 3 was dried at 110°C for 12 hours.…”

“…The Imp-Ni/Al 2 O 3 catalysts were prepared by impregnation. 24 Al 2 O 3 was dried at 110 C for 12 hours. The 0.1 mol of nickel nitrate was added to 500 mL of distilled water.…”

“…For conventional catalysts, the activity of steam reforming depends not only on the active site of the support, but also on the structure of the support. 24,30,37,39,40 , indicating that large Ni specific surface not only provides more active sites for the steam reforming of guaiacol, but also promotes the WGS reaction and suppresses the formation of methane. 21 As shown in Figure 8, the structure of Imp-Ni/Al 2 O 3 and Cop-PEG-Ni/Al 2 O 3 did not change after the reaction.…”