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A process for the utilization of CO2 for the conversion of ethylene to ethylene oxide has been studied for the greenhouse gas life cycle analysis and compared to the commercial production of ethylene oxide which uses oxygen from an air-separation unit. Mixed metal oxides were identified and tested in a micro-reactor for ethylene oxide yield. The mixed-metal oxides were shown to produce ethylene oxide under moderate conditions. Comparison of the single-pass yields of the CO2-utilizing route to the 02-utilizing route shows that the CO2 utilizing route is similar in ethylene conversion and ethylene oxide yield. (C) 2017 The Authors. Published by Elsevier Ltd.