Surface structure and acidity of alumina-boria catalysts

Sato, Satoshi; Kuroki, Masahiko; Sodesawa, Toshiaki; Nozaki, Fumio; Maciel, Gary E.

doi:10.1016/1381-1169(95)00105-0

Cited by 68 publications

(41 citation statements)

References 14 publications

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“…A binary oxide system, Al 2 O 3 /B 2 O 3 , has been applied in many reactions based on the use of heterogeneous catalysts. Thanks to its acidity, this system can be used in the reactions of Beckmann rearrangement [4][5][6][7][8][9][10], alcohol dehydration [11][12][13][14], partial oxidation of olefins [15][16][17][18][19], cracking [20][21][22][23], isomerization of hydrocarbons [24,25] and toluene disproportionation [25,26]. On the other hand, this system proved to be an effective support of metallic phase active in a number of reactions important for industry, like in the reactions of metathesis where it was a support of rhenium [27,28], cyclohexene hydrogenation, where it was a support of platinum [29] or carbon oxide hydrogenation as a support of ruthenium [30].…”

Section: Introductionmentioning

confidence: 99%

Highly dispersed Pt on B2O3/Al2O3 support: catalytic properties in the total oxidation of 1-butene

Przekop

Kirszensztejn

2016

Reac Kinet Mech Cat

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Applying a newly proposed method for the synthesis of a binary system Al 2 O 3 /B 2 O 3 , a series of metal phase supports with the ratio of B:Al components varied in the range from 0.05 to 1 was obtained. The supports were loaded with a metal phase from the water solution of H 2 PtCl 6 to get the final load of 1 % of the metallic phase. The samples were subjected to thermal treatment under oxidizing or reducing conditions. The degree of dispersion of the metal phase, evaluated on the basis of hydrogen chemisorption, was very high, reaching a maximum of over 150 %. The catalytic performance of the catalysts was tested in the reaction of temperature-programmed complete oxidation of 1-butene.

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Section: Introductionmentioning

confidence: 99%

Highly dispersed Pt on B2O3/Al2O3 support: catalytic properties in the total oxidation of 1-butene

Przekop

Kirszensztejn

2016

Reac Kinet Mech Cat

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“…tetrahedral BO 4 and trigonal BO 3 ) of boron in borates [1][2][3][4]7,18,22,23]. FT-IR [2,4,7,18] and 11 B MAS NMR [1,3,18,22,23] technologies have been extensively used to ascertain the nature of the B 2 O 3 structure existing on various supports.…”

Section: Characterization Of B 2 O 3 Structurementioning

confidence: 99%

“…Supported boria catalysts are widely used for various reactions such as vapor phase Beckmann rearrangement of cyclohexanone oxime [1], toluene disproportionation [2], isomerization of 1-butene [3], dehydration of alcohol [4], photocatalytic decomposition of water [5], and partial oxidation of methane using oxygen as the oxidant [6]. These catalysts are usually prepared by impregnating the boria from an aqueous solution of boric acid on an inorganic oxide support, such as SiO 2 , Al 2 O 3 , TiO 2 and ZrO 2 .…”

Section: Introductionmentioning

confidence: 99%

The effect of B2O3 addition on the crystallization of amorphous TiO2–ZrO2 mixed oxide

Mao

2007

Journal of Solid State Chemistry

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“…The presence of boron into the framework of ZSM-5 and ZSM-11 reduces acidity and enhances the isobutene selectivity [8]. BO 4 = species on the alumina surface generate strong Brønsted acid sites [21]. These acid sites were associated to the isobutene selectivity [2,15].…”

Section: Catalytic Performancementioning

confidence: 99%

Skeletal Isomerization of Linear Butenes on Boron Promoted Ferrierite: Effect of the Catalyst Preparation Technique

Comelli

2007

Catal Lett

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Potassium and acid ferrierites were impregnated with boron species by wet and incipient wetness techniques. All samples display a medium-intensity band at 3,450-3,470 cm -1 associated to Si-OHÁÁÁO groups corresponding to boron-containing units. The 1,398-1,404 cm -1 band assigned to the B-O stretching in BO 3 units does not appear on boron-potassium-ferrierite prepared by wet impregnation. Catalytic performance during the linear butene skeletal isomerization was measured. At 300°C, boron impregnated by incipient wetness technique on acid ferrierite reduces both linear butene conversion at a short time and isobutene yield in all time range. Boron-potassium-ferrierite prepared by wet impregnation has a suitable acidity to promote isobutene production. At 450°C, this sample shows the best performance, being the isobutene yield 1.7 times higher than the acid-ferrierite one and reaching the highest isobutene selectivity (92%). This performance is maintained with time. Both isobutene yield and by-product distribution are strongly affected by temperature; dimer intermediates are formed. Finally, both kinds of hydroxyl groups corresponding to 3,466 and 3,635 cm -1 bands influence the isobutene production whereas BO 3 sites are inactive for this reaction.

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Surface structure and acidity of alumina-boria catalysts

Cited by 68 publications

References 14 publications

Highly dispersed Pt on B2O3/Al2O3 support: catalytic properties in the total oxidation of 1-butene

Highly dispersed Pt on B2O3/Al2O3 support: catalytic properties in the total oxidation of 1-butene

The effect of B2O3 addition on the crystallization of amorphous TiO2–ZrO2 mixed oxide

Skeletal Isomerization of Linear Butenes on Boron Promoted Ferrierite: Effect of the Catalyst Preparation Technique

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