Characterization and hydrogenation of methyl oleate over Ru/TiO2, Ru–Sn/TiO2 catalysts

Corradini, Silvana Aparecida da Silva; Lenzi, Giane Gonçalves; Lenzi, Marcelo Kaminski; Soares, Cleide Mara Faria; Santos, Onélia Aparecida Andreo dos

doi:10.1016/j.jnoncrysol.2008.04.040

Cited by 36 publications

(23 citation statements)

References 14 publications

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“…For fresh Sn-Mn-Ti, the reduction temperatures of Mn shift to a higher range with two peaks located at 345°C and 488°C, implying that the addition of Sn increases the difficulty of reducing the Mn species, which is consistent with the results of Corradini et al [35]. On the other hand, the TPR peaks corresponding to the Mn species are less intense compared with those of fresh Mn-Ti,…”

Section: Catalyst Characterizationsupporting

confidence: 88%

SnO –MnO –TiO2 catalysts with high resistance to chlorine poisoning for low-temperature chlorobenzene oxidation

Zhao

Liu

2014

Applied Catalysis A: General

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Section: Catalyst Characterizationsupporting

confidence: 88%

SnO –MnO –TiO2 catalysts with high resistance to chlorine poisoning for low-temperature chlorobenzene oxidation

Zhao

Liu

2014

Applied Catalysis A: General

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“…Finally, the TPR profile for 10% Sn-TiO 2 (Fig. 8g) shows three distinct overlapping reduction peaks in the temperature range of 150-800 • C. Nava et al [66] and Corradini et al [67] also reported similar three stage reduction behavior for Sn/TiO 2 . The H 2 consumption peak at 320 • C is assigned to the reduction of SnO 2 species which are strongly interacting with the TiO 2 surface.…”

Section: Effect Of Metal-support Interactions On Reduction Behavior Omentioning

confidence: 66%

Mesoporous nanocrystalline TiO2 supported metal (Cu, Co, Ni, Pd, Zn, and Sn) catalysts: Effect of metal-support interactions on steam reforming of methanol

Deshmane

Owen

Abrokwah

et al. 2015

Journal of Molecular Catalysis A: Chemical

173

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a b s t r a c tMesoporous TiO 2 supported Cu, Co, Ni, Pd, Sn and Zn catalysts (M-TiO 2 ) were synthesized using facile onestep synthesis method and were characterized using BET, XRD, TGA-DSC, TEM, SEM-EDX, ICP-OES, and H 2 -TPR studies. The catalysts were further tested for steam reforming of methanol (SRM) to investigate their comparative catalytic performance. Depending on the nature of the metal component, the catalysts exhibited surface area, pore sizes, and TiO 2 crystallite sizes in the range of 99-309 m 2 /g, 2.63-4.69 nm and 6.8-17.2 nm, respectively. N 2 -physorption, TGA-DSC and XRD analysis demonstrated that the presence of metal in the TiO 2 matrix stabilized the mesoporous structure by hindering the crystal growth during heat treatment and thereby preventing the collapse of porous structure. Furthermore, the characterization of 5-20% Zn-TiO 2 catalysts indicated that there exist an optimum Zn loading to obtain highest surface area which was found to be 15% in the present study giving a high surface area of ∼258 m 2 /g. This was consistent with the SRM studies where the activity increased up to 15% and then decreased significantly with further increase in Zn loading to 20%. The results of the SRM studies coupled with extensive TPR analysis of different M-TiO 2 catalysts suggest that the specific metal-support interactions play a crucial role in controlling its performance on H 2 production. The SRM activity order for different metals incorporated in mesoporous TiO 2 was observed to be: Pd > Ni > Zn > Co » Cu » Sn. The Zn-TiO 2 catalyst showed the lowest CO selectivity among the different catalysts studied.

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“…Doping a second element to the supported transition metal catalysts is considered to be an efficient means, and a widely used one, to adjust the catalytic performance. Concerning the aforementioned supported Ru catalysts, modification with SnO x , as an example, leads to wide applications in the hydrogenation of aliphatic acids [14,15], esters [16][17][18][19][20][21][22] and α,β-unsaturated carbonyl compounds [23][24][25][26][27]. It is suggested that SnO x doping could improve the catalytic properties of Ru catalyst by the electronic and geometric effects of SnO x [14,15].…”

Section: Introductionmentioning

confidence: 99%

Selective Hydrogenation of m-Dinitrobenzene to m-Nitroaniline over Ru-SnOx/Al2O3 Catalyst

Cheng

Lin

et al. 2014

Catalysts

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Series catalysts of Ru-SnO x /Al 2 O 3 with varying SnO x loading of 0-3 wt% were prepared, and their catalytic activity and selectivity have been discussed and compared for the selective hydrogenation of m-dinitrobenzene (m-DNB) to m-nitroaniline (m-NAN). The Ru-SnO x /Al 2 O 3 catalysts were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and hydrogen temperature-programmed reduction (H 2 -TPR) and desorption (H 2 -TPD). Under the modification of SnO x , the reaction activity increased obviously, and the best selectivity to m-NAN reached above 97% at the complete conversion of m-DNB. With the increasing of the SnO x loading, the amount of active hydrogen adsorption on the surface of the catalyst increased according to the H 2 -TPD analysis, and the electron transferred from Ru to SnO x species, as determined by XPS, inducing an electron-deficient Ru, which is a benefit for the absorption of the nitro group. Therefore, the reaction rate and product selectivity were greatly enhanced. Moreover, the Ru-SnO x /Al 2 O 3 catalyst presented high stability: it could be recycled four times without any loss in activity and selectivity.

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Characterization and hydrogenation of methyl oleate over Ru/TiO2, Ru–Sn/TiO2 catalysts

Cited by 36 publications

References 14 publications

SnO –MnO –TiO2 catalysts with high resistance to chlorine poisoning for low-temperature chlorobenzene oxidation

SnO –MnO –TiO2 catalysts with high resistance to chlorine poisoning for low-temperature chlorobenzene oxidation

Mesoporous nanocrystalline TiO2 supported metal (Cu, Co, Ni, Pd, Zn, and Sn) catalysts: Effect of metal-support interactions on steam reforming of methanol

Selective Hydrogenation of m-Dinitrobenzene to m-Nitroaniline over Ru-SnOx/Al2O3 Catalyst

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