The Role of Anion in the Preparation of Nickel Catalyst Detected by TPR and FTIR Spectra

Effects of pH and chelating agent on the NiWS phase formation in NiW/γ-Al2O3 HDS catalysts

“…9(b)e(e)) exhibit two peaks: one small peak at 503 K ascribed to the reduction of nickel nitrate, and a second one at about 723 K due to reductive decomposition of the [Ni(CyDTA)] 2À complex. The negative peak at 673 K is related to the decomposition of NO, NO 2 and the production of NH 3 [34]. The observed increase in the Ni reduction temperature due to the presence of CyDTA suggests the possible interaction between CyDTA and W species in W/g-Al 2 O 3 .…”

Kinetic evaluation of the tri-reforming process of methane for syngas production

“…The nickel catalyst was characterized by several methods including atomic absorption spectrophotometry (AAS), BET, thermal analysis (TG, DTA), X-ray diffraction (XRD, Cu K a radiation, Siemens D5000), Infrared spectrometry (FTIR Brucker IFS 66), and elementary carbon analysis [10].…”

Ni/ZnO-based Adsorbents Supported on Al2O3, SiO2, TiO2, ZrO2: A Comparison for Desulfurization of Model Gasoline by Reactive Adsorption

“…All the four samples have an obvious peak with T max at around 370°C, which can be attributed to the reduction of NiO particles with no interaction with the supports. 21 The micro shoulder peak at about 260-285 °C corresponds to the reduction of Ni 2 O 3 according to the literature data, 22 indicating the presence of a small amount of Ni 2 O 3 , and the amount in Ni/ZnO-Al 2 O 3 is bigger than in other three samples. Li et al 23 have reported that Ni species interacting with tetrahedrally coordinated sites of γ-Al 2 O 3 is not reducible at temperatures below 400°C.…”