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

Ho, Sheng-Chung; Chou, Tse‐Chuan

doi:10.1021/ie00046a009

Cited by 48 publications

(13 citation statements)

References 20 publications

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“…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 .…”

Section: Temperature-programmed Reduction (Tpr)mentioning

confidence: 92%

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

Santolalla-Vargas

Toriello

Reyes

et al. 2015

Materials Chemistry and Physics

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Section: Temperature-programmed Reduction (Tpr)mentioning

confidence: 92%

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

Santolalla-Vargas

Toriello

Reyes

et al. 2015

Materials Chemistry and Physics

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“…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].…”

Section: Methodsmentioning

confidence: 99%

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

Maciel

Souza

Cavalcanti-Filho

et al. 2010

Reac Kinet Mech Cat

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The conversion of natural gas was carried out via tri-reforming of methane in a fixed bed reactor employing a Ni/c-Al 2 O 3 catalyst. The kinetic evaluations were performed in a temperature range from 923 to 1,123 K under atmospheric pressure. The effects due to water and oxygen addition to the feed of the process were examined in terms of the yields of hydrogen and carbon monoxide. Contributions of the reverse water-gas shift and oxidation reactions were evaluated. At temperatures above 1,000 K, methane and carbon dioxide conversions of 97.35 and 46.75% produced hydrogen and carbon monoxide with yields of 37.35 and 4.99%, respectively. A model was proposed to describe the kinetic behavior of the process considering the proposition of a four step reaction mechanism. The solutions of the equations of the model established predictions in terms of reactant and products concentration evolutions. The model predictions indicated that for operations at 1,123 K and 1.0 bar, with low spatial times (s \ 2.0 kg s/m 3 ), a hydrogen yield as high as 75% was obtained.

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“…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.…”

Section: Resultsmentioning

confidence: 53%

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

Meng¹,

Huang²,

Weng³

et al. 2012

Bulletin of the Korean Chemical Society

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Reactive adsorption desulfurization (RADS) experiments were conducted over a series of commercial metal oxide supports (Al 2 O 3 -, SiO 2 -, TiO 2 -and ZrO 2 -) supported Ni/ZnO adsorbents. The adsorbents were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), and Fourier transform infrared spectroscopy (FTIR) in order to find out the influence of specific types of surface chemistry and structural characteristics on the sulfur adsorptive capacity. The desulfurization performance of all the studied adsorbents decreased in the following order: Ni/ZnO-TiO 2 > Ni/ZnO-ZrO 2 > Ni/ZnO-SiO 2 > Ni/ZnO-Al 2 O 3 . Ni/ZnO-TiO 2 shows the best performance and the three hour sulfur capacity can achieve 12.34 mg S/g adsorbent with a WHSV of 4 h −1. Various characterization techniques suggest that weak interaction between active component and support component, high dispersion of NiO and ZnO, high reducibility and large total Lewis acidity of the adsorbents are important factors in achieving better RADS performance.

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

Cited by 48 publications

References 20 publications

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

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

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

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

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

Cited by 48 publications

References 20 publications

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

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

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

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

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