Onsite Ammonia Synthesis from Water Vapor and Nitrogen in the Air

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2024 Dec 13

PMID 39671479

Authors

Xiaowei Song

Chanbasha Basheer

Jinheng Xu

Richard N Zare

Affiliations

Soon will be listed here.

Abstract

An innovative method for onsite ammonia synthesis under ambient conditions has been developed using a catalyst mesh composed of magnetite (FeO) and Nafion polymer. We pass air through the catalyst, which condenses microdroplets from atmospheric water vapor and uses nitrogen from the air, resulting in ammonia concentrations ranging from 25 to 120 μM in 1 hour, depending on local relative humidity. Operated at room temperature and atmospheric pressure, this technique eliminates the need for additional electricity or radiation, thereby substantially reducing carbon dioxide emissions compared to the traditional Haber-Bosch process. In laboratory experiments, we further optimized the reaction conditions and scaled up the process. After 2 hours of spraying, the ammonia concentration increased to 270.2 ± 25.1 μM. In addition, we present a portable device designed for onsite ammonia production which consistently produces an ammonia concentration that is adequate for some agricultural irrigation purposes.

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