Journal
CATALYSIS COMMUNICATIONS
Volume 167, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2022.106424
Keywords
Green ethylene oxide; Bio-based ethylene oxide; Ethanol to ethylene oxide; Dual-layer concept
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The article presents a new one-step process for the selective oxidation of ethanol to ethylene oxide, without the need for an ethylene purification step. This process utilizes a dual-layer concept and achieves stable operation with high conversions and selectivities.
Ethylene oxide is mainly produced from fossil-based ethylene. Only minor amounts of EO are based on renewable ethanol in a three-step process consisting of an ethanol dehydration step, an ethylene purification step, and an epoxidation step. We herein present a new one-step process for the selective oxidation of ethanol to ethylene oxide by a novel dual-layer concept without intermediate ethylene purification. Ethanol is dehydrated in one reactor on a first catalyst bed to ethylene which is subsequently epoxidized over a silver catalyst. The dual-layer arrangement allowed stable operation over more than 60 h and state-of-the-art conversions and selectivities were obtained.
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