Mesoporous basic zirconium sulfate: structure, acidic properties and catalytic behaviour

Romannikov, V. N.; Фенелонов, В. Б.; Paukshtis, E. A.; Derevyankin, A.Yu.; Зайковский, В. И.

doi:10.1016/s1387-1811(98)00063-8

Cited by 21 publications

(15 citation statements)

References 22 publications

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“…Some properties of a thermo stable mesophase of basic zirconium sulfate with textural characteristics close to those of MCM-41 have been reported [6]. The peculiarities of the catalytic behavior of the mesophase are related to its acidic properties.…”

Section: Introductionmentioning

confidence: 84%

Studies on MCM-41: Effect of sulfate on nitration of phenol

Parida

Rath²

2006

Journal of Molecular Catalysis A: Chemical

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Section: Introductionmentioning

confidence: 84%

Studies on MCM-41: Effect of sulfate on nitration of phenol

Parida

Rath²

2006

Journal of Molecular Catalysis A: Chemical

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“…Similarly, there has been great interest in forming mesoporous SZ by analogous methods, due to its ability to retain a higher amount of sulfur-based active sites than other metal oxides [143][144][145][146]. Many successful attempts have created mesostructured ZrO 2 /surfactant composites, using a range of templating routes including assemblies of cationic [147][148][149][150][151][152][153][154][155], anionic [156][157][158][159][160][161][162] and neutral [135,160] amphiphiles of varying chain lengths and a number of zirconium precursors (Table 2). The addition of surfactant not only forms mesopores, but also, in most cases, increases the surface area of traditional SZ systems (typically 100-120 m 2 /g).…”

Section: Incorporating Mesoporosity Into Sulfated Zirconiamentioning

confidence: 99%

“…Fortunately, it has been found that introducing sulfate [147,148,[150][151][152] and phosphate species [148,[150][151][152]156,157] into ZrO 2 reinforces bonding between zirconia fragments and delays the transitions to tetragonal or monoclinic phases [105] leading to a more stable mesostructured material during template removal [159]. By tuning the sulfate concentration in the initial synthesis mixture of the zirconia/surfactant composite or employing a post-synthetic treatment, the resulting mesostructure exhibits enough thermal stability to withstand calcination to remove surfactant molecules, leaving behind modified amorphous ZrO 2 with an ordered mesoporous structure [147][148][149][150][151][152]. Thus the benefit of using sulfate species, in the synthesis of mesoporous ZrO 2 , is the resulting formation of a catalytically active and thermally stable SZ with an ordered mesopore structure.…”

Section: Incorporating Mesoporosity Into Sulfated Zirconiamentioning

confidence: 99%

Butane Isomerization as a Diagnostic Tool in the Rational Design of Solid Acid Catalysts

et al. 2020

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The growing demand for isobutane as a vital petrochemical feedstock and chemical intermediate has for many decades surpassed industrial outputs that can be supplied through liquified petroleum gases. Alternative methods to resource the isobutane market have been explored, primarily the isomerization of linear n-butane to the substituted isobutane. To date the isobutane market is valued at over 20 billion US dollars, enticing researchers to seek unique and novel catalytic materials to improve on current commercial practices. Two main classes of catalysts have dominated the butane isomerization literature in the last few decades; namely microporous zeolites and sulfated zirconia. Both have been widely researched for butane isomerization, to the point where key catalytic descriptors such as acidity, framework topology and metal doping are becoming well understood. While this provides new researchers with a roadmap for developing new materials, it is has also begun developing into an invaluable tool for diagnosing and understanding the effect of these individual descriptors on catalytic properties. In this review we explore the different factors that influence the active site behavior of particularly zeolites and sulfated zirconia catalysts towards understanding the use of butane isomerization as a diagnostic tool for solid-acid catalysts.

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“…By using zirconium propoxide and ammonium sulfate instead of zirconium sulfate, an ordered pore system with S contents of up to 8.5 wt% could be obtained [80]. Further procedures with [106,107,108] or without [109] sulfate in the surfactant-containing synthesis mixtures have been published. The structural homogeneity and the catalytic properties of these materials vary.…”

Section: Template-directed Formation Of Primary Solidmentioning

confidence: 99%

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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Mesoporous basic zirconium sulfate: structure, acidic properties and catalytic behaviour

Cited by 21 publications

References 22 publications

Studies on MCM-41: Effect of sulfate on nitration of phenol

Studies on MCM-41: Effect of sulfate on nitration of phenol

Butane Isomerization as a Diagnostic Tool in the Rational Design of Solid Acid Catalysts

Oxo‐Anion Modified Oxides

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