Highly dispersed CsO/SiO catalysts for selective intramolecular dehydration of ethylene glycol monoethyl ether to ethyl vinyl ether

• Published in: Catalysis science & technology 2024-03, Vol.14 (6), p.1682-169
• Main Authors: Tao, Huiqin, Chen, Chenju, Bao, An, Ji, Tiangang, Wei, Chao, Zhang, Chunlei
• Format: Article
• ISSN: 2044-4753; 2044-4761
• DOI: 10.1039/d3cy01772a

Intramolecular dehydration of ethylene glycol monoethyl ether (EGME) is a safe and green alternative for the synthesis of ethyl vinyl ether (EVE). A series of x Cs 2 O/SiO 2 - T catalysts with highly dispersed Cs 2 O species was prepared via incipient wetness impregnation and showed excellent catalytic performance in intramolecular dehydration of EGME to EVE. The x Cs 2 O/SiO 2 - T catalysts were well characterized to illustrate the relationship between the component, structure and surface state of catalysts, and the catalytic properties. The results indicated that both Cs 2 O contents and calcination temperatures strongly influence the surface acidic-basic properties of catalysts. Meanwhile, the surface Si-O-Cs species formed during the synthesis process was proved to reinforce the activity as well as the selectivity of x Cs 2 O/SiO 2 - T catalysts. Under the conditions of 400 °C, atmosphere pressure, and WHSV = 0.56 h −1 , the 5Cs 2 O/SiO 2 -500 exhibited excellent stability with EGME conversion of ∼72.5% and EVE selectivity of ∼90%, respectively. Highly selective intramolecular dehydration of ethylene glycol monoethyl ether to ethyl vinyl ether over dispersed Cs 2 O/SiO 2 catalysts.