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Ammonia is the primary chemical intermediate in the fertilizer industry and an important carbon-free energy carrier. Currently, however, ammonia constitutes the most energy-intensive chemical worldwide. Using the feed gases of the conventional Haber-Bosch process, we combined the main stages of an ammonia plant in a single protonic ceramic membrane reactor. The electrochemical process designed can synthesize ammonia with as little as 50% the CO 2 emissions and 25% the energy.

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