Direct synthesis of methyl mercaptan from H 2 /CO/H 2 S using tungsten based supported catalysts: Investigation of the active phase

Cordova, A.; Blanchard, Pascal; Salembier, H.; Lancelot, Christine; Frémy, Georges

doi:10.1016/j.cattod.2016.10.032

Cited by 21 publications

(18 citation statements)

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“…They proposed that Brønsted sites are predominantly located at the boundaries between WO3 monolayer domains (Figure 13). Potassium-doped WO3/Al2O3 catalysts are able to transform gas mixtures such as CO2/H2S/H2, methanol/H2S or CH4/H2S/CO2 into valuable products such as methyl mercaptan (CH3SH) [99][100][101]. All these reactions were reviewed by Taifan and Baltrusaitis [102].…”

Section: Figure 12mentioning

confidence: 99%

Tungsten-Based Catalysts for Environmental Applications

2021

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This review aims to give a general overview of the recent use of tungsten-based catalysts for wide environmental applications, with first some useful background information about tungsten oxides. Tungsten oxide materials exhibit suitable behaviors for surface reactions and catalysis such as acidic properties (mainly Brønsted sites), redox and adsorption properties (due to the presence of oxygen vacancies) and a photostimulation response under visible light (2.6–2.8 eV bandgap). Depending on the operating condition of the catalytic process, each of these behaviors is tunable by controlling structure and morphology (e.g., nanoplates, nanosheets, nanorods, nanowires, nanomesh, microflowers, hollow nanospheres) and/or interactions with other compounds such as conductors (carbon), semiconductors or other oxides (e.g., TiO2) and precious metals. WOx particles can be also dispersed on high specific surface area supports. Based on these behaviors, WO3-based catalysts were developed for numerous environmental applications. This review is divided into five main parts: structure of tungsten-based catalysts, acidity of supported tungsten oxide catalysts, WO3 catalysts for DeNOx applications, total oxidation of volatile organic compounds in gas phase and gas sensors and pollutant remediation in liquid phase (photocatalysis).

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Section: Figure 12mentioning

confidence: 99%

Tungsten-Based Catalysts for Environmental Applications

2021

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“…As an important organic intermediate in the fields of pesticides, medicine, and animal feed, the most important application of methanethiol (CH 3 SH) is the production of methionine, an essential amino acid for humans and animals [ 1 , 2 , 3 , 4 , 5 , 6 ]. Based on the used raw materials and synthesis routes, the production process of CH 3 SH can be divided into the methanol–hydrogen sulfide method, methyl chloride–alkali sulfide method, alkali sulfide–dimethyl sulfate method, thiourea–dimethyl sulfate method, methanol–carbon disulfide method, high-sulfur syngas method, and other methods [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Among these, the methanol–hydrogen sulfide method has attracted considerable attention due to its higher conversion efficiency and product selectivity [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol

Yang

Yao

et al. 2022

Nanomaterials

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In this paper, the molecular sieve NaZSM-5 was modified with zirconium dioxide (ZrO2) by a hydrothermal coating process and other methods. By comparing the effects of the crystal phase structure of ZrO2 and the compositing method on the physicochemical properties and catalytic performance of the obtained composites, the structure–performance relationship of these composite catalysts was revealed. The results indicate that in the hydrothermal system used for the preparation of NaZSM-5, Zr4+ is more likely to dissolve from m-ZrO2 than from t-ZrO2, which can subsequently enter the molecular sieve, causing a greater degree of desiliconization of the framework. The larger specific surface area (360 m2/g) and pore volume (0.52 cm3/g) of the m-ZrO2/NaZSM-5 composite catalyst increase the exposure of its abundant acidic (0.078 mmol/g) and basic (0.081 mmol/g) active centers compared with other composites. Therefore, this catalyst exhibits a shorter induction period and better catalytic performance. Furthermore, compared with the impregnation method and mechanochemical method, the hydrothermal coating method produces a greater variety of acid–base active centers in the composite catalyst due to the hydrothermal modifying effect.

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“…The industrial production of methanethiol takes place through the reaction between methanol and hydrogen sulfide. However, recent research has focused on its synthesis from syngas and hydrogen sulfide [13][14][15]. Although the industrial production of methanethiol has a history of about a century, research on corresponding catalysts and processes is still ongoing.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction between methanol and hydrogen sulfide produces methanethiol or dimethyl sulfide, but the conversion path depends on the acidbase properties of the catalyst [16]. It is well known that the acid-base properties of catalysts are very important in methanol thiolation [13,[16][17][18][19][20][21][22][23][24][25][26], and suitable acid-base properties can control reaction conversion and direct the selectivity of the reaction toward some desired products. The aim of this paper is to review the effects of acid-base properties on the design of methanol thiolation catalysts.…”

Section: Introductionmentioning

confidence: 99%