Adsorption of 1,3-butadiene on supported and promoted silver catalysts

Müslehiddinoğlu, Jale; Vannice, M. A.

doi:10.1016/j.jcat.2003.10.023

Cited by 16 publications

(21 citation statements)

References 55 publications

(87 reference statements)

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“…Subsequently, a large number of investigations on Ag/Al 2 O 3 system including catalysts and reaction mechanisms had been reported [1,[4][5][6]. In our previous work, the stability and activity of Ag/Al 2 O 3 catalysts were greatly improved by IA/IIA metals [7].…”

Section: ð1þmentioning

confidence: 97%

Epoxidation of Butadiene Over Nickel Modified TS-1 Catalyst

Chou

Song

2012

Catal Lett

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Nickel modified Titanium silicalite 1 (TS-1) catalysts provided an environmentally benign and effective method for butadiene epoxidation. Certain loading of modified Ni in our system significantly promoted TS-1 catalytic activity. The product vinyloxirane (VO) was obtained with high yield of 0.49 mol/L (theoretic equilibrium value 0.52 mol/L). The turnover number (TON, determined as the molar VO obtained per molar Ti atom) reached 1,140. Besides, the catalyst kept high activity during five runs of reusability test. XRD, N 2 adsorption and desorption, TPR, XPS, FT-IR and DR UV-Vis were employed to characterize the specific Ni role to Ti-site in Ni/TS-1 catalysts.

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Section: ð1þmentioning

confidence: 97%

Epoxidation of Butadiene Over Nickel Modified TS-1 Catalyst

Chou

Song

2012

Catal Lett

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“…9 Some commercial DRIFTS cells enable using high reaction temperatures and high pressures 10 [19,20], whereas it is more difficult to built IR cell in transmission mode respecting these 11 experimental conditions [21]. 12 DRIFTS exhibits a higher sensitivity with respect to surface species and strongly 13 absorbing samples such as carbon-based materials can be studied [22]. It was demonstrated 14 that DRIFTS could be used for quantitative analysis to determine the surface concentration of 15 adsorbates [5,23,24,25] and the heat of adsorption of CO on oxides and supported metals [26].…”

Section: Introductionmentioning

confidence: 99%

“…DRIFTS 19 could also be used to investigate mass transport properties of zeolites, using sample masses 20 lower than 1 mg [28]. 21 This increased popularity is also due to the availability of a number of affordable 22 commercial cells, though those may exhibit hydrodynamic flaws [29,30] or important 23 temperature gradients that may need to be taken into account [31]. A few research groups 24 have built custom-made cells [32,33], one of which includes a system to subtract gas-phase 25 spectra based on a double-chamber compensation system [34].…”

Section: Introductionmentioning

confidence: 99%

“…A description and properties of the cell can be found in earlier references [30]. 22 The spectrophotometer used was a Nicolet 6700 (ThermoFischer Scientific) fitted with a sample reflectance. This pseudo-absorbance gives a better linear representation of the band 1 intensity against surface coverage than that given by the Kubelka-Munk function for strongly 2 absorbing media such as those based on metals supported on oxides [36].…”

Section: Introductionmentioning

confidence: 99%

“…Accurate 20 correction of gas-phase CO signal during DRIFTS analyses can be obtained by collecting a 21 subtrahend spectrum under identical reaction conditions over an inert material such as SiC. 22 Spurious bands may otherwise arise if a subtrahend is collected at a different temperature. 23 24…”

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confidence: 99%

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Spectrum baseline artefacts and correction of gas-phase species signal during diffuse reflectance FT-IR analyses of catalysts at variable temperatures

Paredes-Nunez

Jbir

Bianchi

et al. 2015

Applied Catalysis A: General

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FTIR studies of butane, toluene and nitric oxide adsorption on Ag exchanged NaMordenite

2011

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In this work, we studied the adsorption of butane, toluene and nitric oxide on NaMordenite exchanged with different amounts of silver. The reactions that occurred when the adsorbed hydrocarbons interacted with NO and the effect of water adsorption were also addressed. Different silver species were formed after ion exchange and they were detected by TPR analysis. Highly dispersed Ag 2 O particles were reduced at temperatures lower than 300°C whereas Ag + exchanged ions showed two TPR peaks, which can be ascribed to species exchanged at different mordenite sites. The TPD experiments after adsorption of NO at 25°C showed that the only desorbed species was NO 2 which was formed by the total reduction of Ag 2 O particles. When the adsorbed butane was exposed to NO (1000 ppm), isocyanate species were formed on Ag + ionic sites as well as Ag + -(NOx)-CO species. Toluene adsorption was stronger than butane since adsorbed toluene molecules were held even at 400°C. The characteristic bands of the aromatic ring C=C bond was observed as well as that of methyl groups interacting with Ag + and Na + ions. However, the appearance of carboxylic groups at temperatures above 300°C in inert flow indicated the partial oxidation of toluene due to Ag 2 O species present in the samples. After contacting adsorbed toluene with NO, different FTIR bands correspond to organic nitrocompounds, isocyanate, cyanide and isocyanide species adsorbed on Ag + ions, were detected. The presence of water inhibited the formation of NO 2 species and the hydrocarbon adsorption on Na + sites but did not affect the toluene-Ag + interaction.

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Adsorption of 1,3-butadiene on supported and promoted silver catalysts

Cited by 16 publications

References 55 publications

Epoxidation of Butadiene Over Nickel Modified TS-1 Catalyst

Epoxidation of Butadiene Over Nickel Modified TS-1 Catalyst

Spectrum baseline artefacts and correction of gas-phase species signal during diffuse reflectance FT-IR analyses of catalysts at variable temperatures

FTIR studies of butane, toluene and nitric oxide adsorption on Ag exchanged NaMordenite

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