Carbon-neutral liquid fuel generation {is essential|is crucial} for decarbonizing sectors that {cannot|can’t|can not} readily electrify. {Recently|Lately|Not too long ago} commercialized acetogenic gas fermentation {offers|provides|gives|delivers|presents} an {alternative|option} to {conventional|standard|traditional} biofuels that circumvents efficiency limitations and land {requirements|specifications|needs}, {provided|supplied|offered} the requisite H2/CO feedstocks {can be|may be|could be|might be|is often|is usually} generated {efficiently|effectively} {using|utilizing|making use of|employing|working with|applying} renewable inputs. CO2 electrolysis to CO is {under|below|beneath} {development|improvement} for this {purpose|objective|goal}, but suffers from scalability challenges and impurity sensitivity. We describe an {alternative|option} that utilizes dispersed alkali carbonates as reverse water-gas shift (RWGS) catalysts to convert H2 and CO2 to an {appropriate|suitable|proper|acceptable} ratio of CO/CO2/H2 for acetogenic fermentation. {Using|Utilizing|Making use of|Employing|Working with|Applying} a fixed bed reactor operating at industrially relevant space velocity, we demonstrate equilibrium RWGS conversion {starting|beginning} at 410 °C that remains {stable|steady} {over|more than} days, even with 50 ppm H2S impurity. The {combination|mixture} of carbonate-catalyzed RWGS, water electrolysis, and gas fermentation could convert {electricity|electrical energy} to ethanol with {nearly|almost|practically} 50% {energy|power} efficiency, {providing|supplying|offering|delivering|giving} a compelling {option|choice|alternative|selection|solution} for renewable liquid fuel production. 6-Bromo-2,7-naphthyridin-1(2H)-one Price Buy2621939-48-6 PMID:24732841
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