IR study of CS2 adsorption on metal oxides: relation with their surface oxygen basicity and mobility

Sahibed-Dine, Abdelaziz; Aboulayt, A.; Bensitel, M.; Saad, A. B. Mohammed; Daturi, Marco; Lavalley, Jean‐Claude

doi:10.1016/s1381-1169(00)00326-5

Cited by 36 publications

(44 citation statements)

References 26 publications

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“…CS 2 hydrolysis has been studied by analyzing the sulfur-containing compounds in tail gas by Wang et al [13], and it was confirmed that CS 2 hydrolysis first gives rise to COS, then COS hydrolyzes via hydrogen thiocarbonate, leading to the formation of H 2 S. In this process, the hydrolysis of CS 2 to COS is the rate-determining step, while COS to H 2 S is a fast reaction. This result was backed by Laperdrix et al [14] and Sahibed-Dine et al [15], who studied the process of CS 2 hydrolysis using IR. Tong et al [6] studied the kinetics of CS 2 hydrolysis, and their results agreed with the two-step mechanism mentioned above.…”

mentioning

confidence: 83%

A theoretical study on the hydrolysis mechanism of carbon disulfide

et al. 2011

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The hydrolysis mechanism of CS(2) was studied using density functional theory. By analyzing the structures of the reactant, transition states, intermediates, and products, it can be concluded that the hydrolysis of CS(2) occurs via two mechanisms, one of which is a two-step mechanism (CS(2) first reacts with an H(2)O, leading to the formation of the intermediate COS, then COS reacts with another H(2)O, resulting in the formation of H(2)S and CO(2)). The other is a one-step mechanism, where CS(2) reacts with two H(2)O molecules continuously, leading to the formation of H(2)S and CO(2). By analyzing the thermodynamics and the change in the kinetic function, it can be concluded that the rate-determining step involves H and OH in H(2)O attacking S and C in CS(2), respectively, causing the C=S double bond to change into a single bond. The two mechanisms are competitive. When performing the hydrolysis of CS(2) with a catalyst, the optimal temperature is below 252°C.

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mentioning

confidence: 83%

A theoretical study on the hydrolysis mechanism of carbon disulfide

et al. 2011

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“…A pair of peaks of gaseous carbon dioxide (CO2) were observed at 2337 and 2361 cm -1 (15)(16)(17). The bands at 1624 (1647), 1412 cm -1 are due to surface HCO3 -species (13,(15)(16)(17), and the band at 1354 cm -1 is assigned to surface SO4 2-species (18)(19)(20)(21)(22). It is also found that the peaks for gas-phase CO2, surface HCO3 -, and SO4 2-species increase in intensity with time, while the peaks for gaseous OCS diminish, suggesting that OCS in O2 can be converted into CO2, surface HCO3 -, and SO4 2-species on the samples of atmospheric particles, the preoxidized atmospheric particles, and the preoxidized Al2O3 at 298 K. The gas-phase OCS concentration shown in Figure 2 was determined by comparing OCS absorbance peak area with the calibration curve of gas-phase OCS concentration.…”

Section: Heterogeneous Reaction Of Ocs On the Atmosphericmentioning

confidence: 99%

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Liu

et al. 2005

Environ. Sci. Technol.

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Heterogeneous oxidation of carbonyl sulfide (OCS) on atmospheric particles and alumina (Al 2 O 3 ) was investigated in a closed system and a flowed system using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). At room temperature, OCS could be catalytically oxidized on the surface of atmospheric particles and Al 2 O 3 to form gas-phase CO 2 and surface sulfate (SO 4 2-), sulfite (HSO 3 -), and hydrogen carbonate (HCO 3 -) species. The real atmospheric particles were characterized using X-ray fluorescence (XRF) and the Brunauer-Emmett-Teller (BET) method. As a simplified model, Al 2 O 3 was used to study the reaction mechanism of heterogeneous oxidation of OCS. The hydrogen thiocarbonate surface (HSCO 2 -) species, an intermediate formed in the reaction of OCS with surface hydroxyl (OH), could only be observed on the prereduced Al 2 O 3 sample. The experimental results also indicate that surface oxygen containing species on the atmospheric particle sample and the Al 2 O 3 sample might be the key reactant for OCS oxidation. A reaction mechanism of heterogeneous oxidation of OCS on Al 2 O 3 surface is discussed.

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“…Low activity per surface area over the catalysts calcined at lower temperature can be due to the catalyst structure. By means of FT-IR, the surface OH group (3499 cm −1 ) of amorphous phase of CeO 2 [28] was significantly observed on the CeO 2 calcined at 673 K. Calcination at higher temperature decreased the band more significantly than those of the OH groups on crystalline CeO 2 (3724 and 3631 cm −1 ). In addition, after methanol adsorption, both of the bands assigned to the OH groups on crystalline CeO 2 disappeared on all the samples, and the band assigned to that on amorphous CeO 2 was unchanged.…”

Section: Choice Of Ceria Catalysts In Direct Dmc Synthesismentioning

confidence: 94%

Direct Synthesis of Organic Carbonates from CO₂and Alcohols Using Heterogeneous Oxide Catalysts

Nakagawa

Honda²,

Tomishige

2014

Green Carbon Dioxide

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IR study of CS2 adsorption on metal oxides: relation with their surface oxygen basicity and mobility

Cited by 36 publications

References 26 publications

A theoretical study on the hydrolysis mechanism of carbon disulfide

A theoretical study on the hydrolysis mechanism of carbon disulfide

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Direct Synthesis of Organic Carbonates from CO₂and Alcohols Using Heterogeneous Oxide Catalysts

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IR study of CS2 adsorption on metal oxides: relation with their surface oxygen basicity and mobility

Cited by 36 publications

References 26 publications

A theoretical study on the hydrolysis mechanism of carbon disulfide

A theoretical study on the hydrolysis mechanism of carbon disulfide

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Direct Synthesis of Organic Carbonates from CO2and Alcohols Using Heterogeneous Oxide Catalysts

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Product

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Direct Synthesis of Organic Carbonates from CO₂and Alcohols Using Heterogeneous Oxide Catalysts