Study on the application of sulfonation catalysis in a new formaldehyde recovery process

Yuan, Meng; Shao, Yihe; Tang, Rongjun; Li, Jie; Niwamanya, Noah; Tian, Yuanyu; Qiao, Yingyun; Li, Dawei; Zhang, Jinhong

doi:10.1016/j.colsurfa.2021.127593

Cited by 3 publications

(2 citation statements)

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“…In recent years, there has been a wave of research on methanol and its derivatives 13 such as methylal (DMM), which has good solubility, extremely low toxicity, and is widely used 14 . In addition to pharmaceutical and fragrance applications, DMM can be used as a diesel fuel additive to improve combustion performance and reduce emissions of NOx and PM from engine exhaust 15 .…”

Section: Introductionmentioning

confidence: 99%

“…12 In recent years, there has been a wave of research on methanol and its derivatives 13 such as methylal (DMM), which has good solubility, extremely low toxicity, and is widely used. 14 In addition to pharmaceutical and fragrance applications, DMM can be used as a diesel fuel additive to improve combustion performance and reduce emissions of NOx and PM from engine exhaust. 15 If low-cost, largescale production of DMM can be achieved, it will not only solve the problem of methanol oversupply but also improve the quality of diesel fuel and help to alleviate fuel shortages.…”

Section: Introductionmentioning

confidence: 99%

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One‐step synthesis of methylal via methanol oxidation: Reaction kinetics, mechanism, thermodynamics, and product analysis

Yuan

Sun

Tian

et al. 2022

Intl J of Energy Research

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Summary The recent abundance of methanol has made it an attractive raw material for chemical synthesis. This study conducts a thermodynamic analysis of the main and side reactions in a system where methanol is oxidized to methylal. A relationship between the thermodynamics and product distribution of this system is proposed. By studying the effect of reaction temperature on the catalytic activity of a Mo‐Fe/HZSM‐5 (80‐80) catalyst, the relationship between thermodynamic parameters and product distribution was further verified. Kinetic analysis of the one‐step process shows that a lower activation energy is one of the reasons for the higher catalytic activity of the iron‐molybdenum‐based bifunctional catalyst. Accordingly, it is proposed that all main and side reactions in this process are driven by two chemical adsorption reactions. The first occurs at active sites of iron and molybdenum oxidation on the catalyst surface. The adsorbed methanol and O2 obtain hydroxyl and methoxy groups linked to the iron molybdate. Subsequently, desorbed formaldehyde and methanol undergo a second chemical adsorption on the acidic active centres of the catalyst with surface carbonyl and hydroxyl groups, respectively. Formaldehyde and the adsorbed methoxy group are catalysed by the acidic sites to generate intermediates similar to the methoxy and methylene group structures. This study provides complete information on the thermodynamics, kinetics, and reaction mechanism of a one‐step process of producing methylal from methanol, thereby allowing optimization of this process.

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Section: Introductionmentioning

confidence: 99%