Dehydrogenation of Isobutane over Zinc Titanate Thin Film Catalysts

Chen, Z.X.; Derking, Anke; Koot, Wouter; Dijk, Meine Pieter van

doi:10.1006/jcat.1996.0235

Cited by 55 publications

(35 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the zinc titanate catalyst deactivated rapidly when both the selectivity and conversion were kept at a higher level. 19,20 Zn/SiO 2 catalyst exhibited high propylene selectivity in the dehydrogenation of propane. 21 However, the stability is also a big challenge for the industrial applications of Zn/SiO 2 catalyst since the activity can only maintain nearly 50% of the initial value during 12 h test.…”

Section: Catalytic Performancementioning

confidence: 99%

“…It has been accepted that Zn-containing catalysts were active in the dehydrogenation of alkanes. [14][15][16][19][20][21] Zn-modied HZSM-5 zeolites (Zn/ZSM-5) have been reported to be effective catalysts for low-temperature activation of light alkanes, with the modied Zn species playing a key role in light alkane dehydrogenation. [14][15][16] However, their commercial use in such processes is impeded by their poor alkene selectivity with respect to the formation of large amounts of cracked dry gas byproducts (C 1 and C 2 hydrocarbons), resulting from the strong acidic character of HZSM-5 zeolite.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Silicalite-1 zeolite acidification by zinc modification and its catalytic properties for isobutane conversion

Liu

et al. 2018

RSC Adv.

View full text Add to dashboard Cite

A series of Zn-modified Silicalite-1 (S-1) zeolites (Zn x /S-1) were prepared by the wetness-impregnation method and applied in the catalytic conversion of isobutane. The structure and location of Zn species in Zn x /S-1 were investigated using UV-Vis and N 2 physical adsorption. The acidity and origin of the acid sites in Zn x /S-1 were studied by NH 3 -temperature programmed desorption and Fourier-transform infrared analysis. The catalytic performance of Zn x /S-1 for isobutane conversion was investigated in a fixed-bed microreactor. In the experiments, the acidity of S-1 zeolite was dramatically increased by modification with Zn, with both Lewis and Brønsted sites identified in Zn x /S-1. The relationship between Brønsted acid sites and Zn-OH groups on ZnO clusters of Zn x /S-1 was also revealed for the first time.Furthermore, Zn x /S-1 catalysts exhibited excellent catalytic performances in both isobutane dehydrogenation and butene isomerization reactions. A high selectivity of total butene products ranging from 84.6 to 97.2 was achieved on the catalysts with different Zn loadings. Moreover, the linear correlation between isobutane conversion and the acid amount (determined by NH 3 -TPD) confirmed that the weak-to-medium acid sites in Zn x /S-1 should play a key role in isobutane conversion.

show abstract

Section: Catalytic Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silicalite-1 zeolite acidification by zinc modification and its catalytic properties for isobutane conversion

Liu

et al. 2018

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Most of those studies involve only bulk system. References concerning the characteristics of zinc titanate based thin film are generally lacking, except the report of Chen et al regarding the zinc titanate thin film prepared by a metalorganic chemical vapor deposition [4,14]. However their studies only limited to the analyses of phase, composition and microstructure of thin film, especially focusing on Zn 2 TiO 4 phase for the catalytic application.…”

Section: Introductionmentioning

confidence: 98%

“…Much attention has been still paid because of its diverse electrical and chemical properties, leading to the wide applications in sensors, microelectronics and high performance catalysts [3][4][5][6]. Recently, the zinc titanate ceramics have been promisingly reported as microwave dielectric materials due to their stable and proper dielectric properties [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of zinc titanate thin films prepared by Rf magnetron sputtering

et al. 2008

View full text Add to dashboard Cite

Zinc titanate thin films of~500 nm in thickness were synthesized by an RF magnetron sputtering using a sintered ceramic target. After annealing in temperature ranges of 300-800°C, their phase transition and dielectric properties were investigated as a function of annealing temperature. Crystalline ZnTiO 3 phase was first detected at the annealing temperature of 500°C within XRD detection limit though the sputtered film was mainly amorphous. ZnTiO 3 still remained as a main phase although the slight decomposition of ZnTiO 3 into Zn 2 TiO 4 and TiO 2 occurred in association with the increase of annealing temperature. Dielectric properties were apparently improved with increase of annealing temperature and showed maximum value at 650°C. Further higher temperature annealing caused inferior dielectric property. These results were explained in terms of the presence of TiO 2 (rutile) phase, resulting from the decomposition of ZnTiO 3 phase, and the morphology of the thin film.

show abstract

“…ZnTiO 3 is an attractive material for applications in microwave dielectrics, catalysts and phosphors [1][2][3][4][5][6][7]. There are three compounds existing in the ZnO-TiO 2 system: Zn 2 TiO 4 , ZnTiO 3 and Zn 2 Ti 3 O 8 [1,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%