Catalytic performance of vanadia-doped titania-pillared clay for the selective catalytic oxidation of H2S

Bineesh, Kanattukara Vijayan; Kim, Sang-Yun; Jermy, B. Rabindran; Park, Dae‐Won

doi:10.1016/j.jiec.2008.10.006

Cited by 37 publications

(32 citation statements)

References 36 publications

(28 reference statements)

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“…Pillared interlayered clays (PILCs) supported vanadium species catalysts, such as Ti, Zr, Fe PILC supported V 2 O 5 catalysts, 1,3,5,6 have been of great research interest in the past few decades because PILCs can be tailored to particular applications by varying the size and separation of the pillars as well as their composition. Unfortunately, their microporous and moderate porosity structure limits their further application (a pore volume of 0.15-0.40 cm 3 g…”

Section: Introductionmentioning

confidence: 99%

Selective oxidation of H2S over V2O5 supported on CeO2-intercalated Laponite clay catalysts

Dou

Wang

Cheng

et al. 2013

Catal. Sci. Technol.

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A series of V 2 O 5 supported on CeO 2 -intercalated clay catalysts (named V 2 O 5 /Ce-Lap catalysts) with mesoporous structure and high specific surface area were prepared. The structural characteristics and physicochemical properties were studied in detail. These catalysts were evaluated for the H 2 S selective oxidation. It was revealed that all V 2 O 5 /Ce-Lap catalysts showed high catalytic activities in the temperature range of 120-220 1C due to the redox reaction of highly dispersed V 5+ species, and the catalytic mechanism obeyed a redox process, i.e. a stepwise mechanism. Additionally, the chemically absorbed oxygen also played an important role in H 2 S selective oxidation. Among them, the 5% V 2 O 5 /Ce-Lap catalyst presented the best catalytic activity and excellent regenerability at 180 1C. Finally, the catalyst deactivation mechanism was explored.

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Section: Introductionmentioning

confidence: 99%

Selective oxidation of H2S over V2O5 supported on CeO2-intercalated Laponite clay catalysts

Dou

Wang

Cheng

et al. 2013

Catal. Sci. Technol.

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“…It is clear that reducing reducibility of Vsites could favor a decrease of the rate of consecutive reaction. However, this will depend on the reaction conditions, especially reaction temperature and feed composition [6][7][8][9][10][11][12][13]38].…”

Section: Discussionmentioning

confidence: 99%

“…Vanadium oxide based materials is an interesting group of catalysts which have been reported as selective in partial oxidation reactions of alkanes, alkenes and aromatic hydrocarbons [1][2][3][4][5] and, more recently, in the partial oxidation of H2S to sulphur [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Catalytic behavior of NaV6O15 bronze for partial oxidation of hydrogen sulfide

et al. 2014

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ElsevierSoriano Rodríguez, MD.; Rodriguez-Castellon, E.; Garcia-Gonzalez, E.; López Nieto, JM. (2014). Catalytic behavior of NaV6O15 bronze for partial oxidation of hydrogen sulfide. Catalysis AbstractNa-containing V2O5 materials have been prepared hydrothermally from gels with Na/V ratios of 0.02 to 0.34, and calcined at 500ºC. The calcined samples have been characterized and tested as catalysts in the partial oxidation of H2S to elemental sulfur.At low Na-contents, V2O5 and NaV6O15 bronze are formed, with the NaV6O15/V2O5 ratio increasing with the Na-content. Pure NaV6O15 bronze is mainly formed from gels containing a Na/V ratio of 0.18. However, NaV6O15 and NaV3O8 bronzes are formed at from gels with Na/V ratio higher than 0.35. NaV6O15 based catalyst shows high conversion for the oxidation of H2S with a high selectivity into elemental sulfur. These catalysts are more active and stable than pure or Na-doped V2O5 catalysts. V4O9 is observed in used catalysts derived from pure and Na-doped V2O5 and materials containing NaV6O15/V2O5 mixtures. However, no changes in the NaV6O15 crystalline structure are observed in pure and NaV6O15/V2O5 mixtures catalysts. Accordingly, NaV6O15 crystalline phase is stable for several hours of catalysis at a difference with V2O5. The active sites in V-containing vanadium catalysts are probably V 5+ -O-V 4+ pairs as proposed for V4O9 crystalline phase. The best catalytic performances were achieved on V2O5-NaV6O15 mixtures which are transformed to V4O9-NaV6O15 mixtures during the catalytic tests. These catalytic results could be due to the intrinsic physical properties of both phases but also because of the optimal dispersion.Keywords: NaV 6 O 15 bronze, V 2 O 5 , V 4 O 9 , selective oxidation of hydrogen sulfide to sulfur, Na-doped vanadium oxide catalyst 3

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“…metallic cation, hydrolysis conditions, reaction time, synthesis temperature, and the washing, drying and calcination processes [11,12]. In our previous works [13][14][15], we reported the performance of vanadia catalysts supported on to pillared clay for the selective oxidation of H 2 S. In the present work, we studied the physicochemical properties and catalytic performance of titania-pillared clay and zirconia-pillared clay for the selective catalytic oxidation of H 2 S.…”

Section: Introductionmentioning

confidence: 95%

Synthesis of metal-oxide pillared montmorillonite clay for the selective catalytic oxidation of H2S

Bineesh

Kim

Cho

et al. 2010

Journal of Industrial and Engineering Chemistry

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Catalytic performance of vanadia-doped titania-pillared clay for the selective catalytic oxidation of H2S

Cited by 37 publications

References 36 publications

Selective oxidation of H2S over V2O5 supported on CeO2-intercalated Laponite clay catalysts

Selective oxidation of H2S over V2O5 supported on CeO2-intercalated Laponite clay catalysts

Catalytic behavior of NaV6O15 bronze for partial oxidation of hydrogen sulfide

Synthesis of metal-oxide pillared montmorillonite clay for the selective catalytic oxidation of H2S

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