Acidic properties of nickel sulfate supported on TiO2–ZrO2 and catalytic activity for acid catalysis

Sohn, Jong Rack; Lee, Si Hoon

doi:10.1016/j.apcata.2004.01.034

Cited by 55 publications

(37 citation statements)

References 44 publications

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“…The specific surface areas of 20NiO/ 5Al 2 O 3 -TiO 2 /WO 3 catalysts containing different WO 3 contents and calcined at 400 °C for 1.5 h are listed in 50-52 Figure 6 shows the infrared spectra of ammonia adsorbed on 20NiO/5Al 2 O 3 -TiO 2 /15WO 3 catalyst evacuated at 400 °C for 1 h. For 20NiO/5Al 2 O 3 -TiO 2 /15WO 3 , the band at 1446 cm −1 is the characteristic peak of ammonium ion, which is formed on the Brönsted acid sites. The absorption peak at 1611 cm −1 is contributed by ammonia coordinately bonded to Lewis acid sites, [50][51][52] indicating the presence of both Brönsted and Lewis acid sites on the surface of 20NiO/5Al 2 O 3 -TiO 2 /15WO 3 catalyst. Other samples having different NiO and WO 3 contents also showed the presence of both Lewis and Brönsted acids.…”

Section: Resultsmentioning

confidence: 99%

“…This is because the initial product of ethylene dimerization is 1-butene. 4,9,50 Therefore, the initially produced 1-butene is also isomerized to 2-butene during the reaction time. 18,19,50,51 Effect of WO 3 modification on catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

“…4,9,50 Therefore, the initially produced 1-butene is also isomerized to 2-butene during the reaction time. 18,19,50,51 Effect of WO 3 modification on catalytic activity. Recently, it has been reported that metal oxide modified with WO 3 can be used as an alternative catalyst in reactions requiring strong acid sites.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Al₂O₃Addition and WO₃Modification on Catalytic Activity of NiO/Al₂O₃-TiO₂/WO₃for Ethylene Dimerization

Pae¹,

Sohn

2007

Bulletin of the Korean Chemical Society

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Strong solid acid catalysts, NiO/Al 2 O 3 -TiO 2 /WO 3 for ethylene dimerization were prepared by the addition of Al 2 O 3 and the modification with WO 3 . The acid sites and acid strength were increased by the inductive effect of WO 3 species bonded to the surface of catalysts. The larger the dispersed WO 3 amount, the higher both the acidity and catalytic activity for ethylene dimerization. The addition of Al 2 O 3 to TiO 2 up to 5 mol% enhanced acidity and catalytic activity gradually due to the interaction between Al 2 O 3 and TiO 2 and consequent formation of Al-O-Ti bond.Key Words : Al 2 O 3 addition, WO 3 modification, Acidity, Ethylene dimerization IntrocuctionHeterogeneous catalysts for the dimerization and oligomerization of olefins, consisting mainly of nickel compounds supported on oxides, have been known for many years. A considerable number of papers have dealt with the problem of nickel-containing catalysts for ethylene dimerization.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effect of Al₂O₃Addition and WO₃Modification on Catalytic Activity of NiO/Al₂O₃-TiO₂/WO₃for Ethylene Dimerization

Pae¹,

Sohn

2007

Bulletin of the Korean Chemical Society

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“…5,30,33 Figure 8 shows the infrared spectra of ammonia adsorbed on 10-NiSO 4 /1-CeO 2 - Table 1. Surface area and acidity of NiSO4/1-CeO2-ZrO2 catalysts containing different NiSO4 contents and calcined at 600 of ammonium ion, which is formed on the Brönsted acid sites and the absorption peak at 1612 cm −1 is contributed by ammonia coordinately bonded to Lewis acid sites, 5,30,33 indicating the presence of both Brönsted and Lewis acid sites on the surface of 10-NiSO 4 /1-CeO 2 -ZrO 2 sample. Other samples having different nickel sulfate contents also showed the presence of both Lewis and Brönsted acids.…”

Section: 25mentioning

confidence: 99%

“…Among them sulfated oxides, such as sulfated zirconia, titania, and iron oxide exhibiting high thermostability, superacidic property, and high catalytic activity, have evoked increasing interest. 1,2,5 The strong acidity of zirconia-supported sulfate has attracted much attention because of its ability to catalyze many reactions such as cracking, alkylation, and isomerization.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and Catalytic Properties of NiSO₄/CeO₂-ZrO₂Catalyst Promoted with CeO₂for Acid Catalysis

Sohn

Shin²

2007

Bulletin of the Korean Chemical Society

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A solid acid catalyst, NiSO 4 /CeO 2 -ZrO 2 was prepared simply by promoting ZrO 2 with CeO 2 and supporting nickel sulfate on CeO 2 -ZrO 2 . The support of NiSO 4 on ZrO 2 shifted the phase transition of ZrO 2 from amorphous to tetragonal to higher temperatures because of the interaction between NiSO 4 and ZrO 2 . The surface area of 10-NiSO 4 /1-CeO 2 -ZrO 2 promoted with CeO 2 and calcined at 600 ). This high surface area of 10-NiSO 4 /1-CeO 2 -ZrO 2 was due to the promoting effect of CeO 2 which makes zirconia a stable tetragonal phase as confirmed by XRD. The role of CeO 2 was to form a thermally stable solid solution with zirconia and consequently to give high surface area and acidity of the sample, and high thermal stability of the surface sulfate species. 10-NiSO 4 /1-CeO 2 -ZrO 2 containing 1 mol% CeO 2 and 10 wt% NiSO 4 , and calcined at 600 o C exhibited maximum catalytic activities for both reactions, 2-propanol dehydration and cumene dealkylation.

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Oxo‐Anion Modified Oxides

Jentoft

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Classification Variety of Materials and Focus Target Properties Structure–Activity Relationships Effect of Sulfate and Other Oxo‐Anions Preparation Routes Formation of Primary Solid Formation of Pure Hydrous Zirconia Formation of Sulfate‐Containing Hydrous Zirconia Template‐Directed Formation of Primary Solid Commercially Available Precursors Anion‐Modification of Primary Solid Addition of Oxo‐Anions to Primary Solid in Liquid Medium Sulfation of Primary Solid via Gas Phase Introduction of Oxo‐Anions Using Solid Precursors Addition of Promoters (Optional) Promoters Structure–Activity Relationships Effect of Promoters Addition of Promoters Calcination Events Occurring During Calcination Effect of Bed Volume and Packing Effect of Calcination Temperature on Physical Properties Effect of Calcination Temperature on Catalytic Performance Effect of Holding Time Calcination: A Summary Sulfation of Thermally Treated Crystalline Oxides Sulfation with Aqueous Solutions (Solid–Liquid Phase) Sulfation via Gas Phase (Solid–Gas Phase) Sulfation of Zirconia using Solid Sulfate Precursors Addition of Noble Metals Activation Summary

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Acidic properties of nickel sulfate supported on TiO2–ZrO2 and catalytic activity for acid catalysis

Cited by 55 publications

References 44 publications

Effect of Al₂O₃Addition and WO₃Modification on Catalytic Activity of NiO/Al₂O₃-TiO₂/WO₃for Ethylene Dimerization

Effect of Al₂O₃Addition and WO₃Modification on Catalytic Activity of NiO/Al₂O₃-TiO₂/WO₃for Ethylene Dimerization

Physicochemical and Catalytic Properties of NiSO₄/CeO₂-ZrO₂Catalyst Promoted with CeO₂for Acid Catalysis

Oxo‐Anion Modified Oxides

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Acidic properties of nickel sulfate supported on TiO2–ZrO2 and catalytic activity for acid catalysis

Cited by 55 publications

References 44 publications

Effect of Al2O3Addition and WO3Modification on Catalytic Activity of NiO/Al2O3-TiO2/WO3for Ethylene Dimerization

Effect of Al2O3Addition and WO3Modification on Catalytic Activity of NiO/Al2O3-TiO2/WO3for Ethylene Dimerization

Physicochemical and Catalytic Properties of NiSO4/CeO2-ZrO2Catalyst Promoted with CeO2for Acid Catalysis

Oxo‐Anion Modified Oxides

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Effect of Al₂O₃Addition and WO₃Modification on Catalytic Activity of NiO/Al₂O₃-TiO₂/WO₃for Ethylene Dimerization

Effect of Al₂O₃Addition and WO₃Modification on Catalytic Activity of NiO/Al₂O₃-TiO₂/WO₃for Ethylene Dimerization

Physicochemical and Catalytic Properties of NiSO₄/CeO₂-ZrO₂Catalyst Promoted with CeO₂for Acid Catalysis