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Updated: Jun 30, 2025

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Published on: January 22, 2015

Long-term continuous ammonia electrosynthesis.

Shaofeng Li¹, Yuanyuan Zhou¹, Xianbiao Fu¹

¹Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark.

|March 19, 2024

Summary

This summary is machine-generated.

A novel chain-ether electrolyte enables stable, long-term ammonia electrosynthesis by preventing solvent issues. This breakthrough offers a continuous, efficient alternative for producing this vital carbon-free fuel.

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Ammonia Synthesis at Low Pressure

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Ammonia Synthesis at Low Pressure

Ammonia Synthesis at Low Pressure

Published on: August 23, 2017

Area of Science:

Electrochemistry
Materials Science
Chemical Engineering

Background:

Ammonia is vital for fertilizers and industry, and as a potential carbon-free fuel.
Electrosynthesis of ammonia offers an alternative to the Haber-Bosch process, with lithium-mediated routes showing promise.
Conventional solvents like tetrahydrofuran hinder continuous ammonia production due to polymerization and volatility.

Purpose of the Study:

To develop a stable electrolyte for long-term, continuous ammonia electrosynthesis.
To overcome the limitations of traditional solvents in ammonia production.
To demonstrate a viable alternative to the Haber-Bosch process using electrosynthesis.

Main Methods:

Investigated a chain-ether-based electrolyte for ammonia electrosynthesis.
Utilized a flow electrolyser with a 25 cm² electrode.
Operated the system at 1 bar pressure and room temperature for 300 hours.

Main Results:

The chain-ether electrolyte demonstrated non-polymerization properties and a high boiling point.
A stable solid-electrolyte interphase layer formed on the gas diffusion electrode.
Achieved 300 hours of continuous operation with 64% ± 1% current-to-ammonia efficiency and 98% gas-phase ammonia purity.

Conclusions:

Chain-ether electrolytes are crucial for stable, long-term continuous ammonia synthesis.
This approach provides a promising, efficient, and stable method for ammonia production.
The solvent plays a critical role in the performance and longevity of ammonia electrosynthesis systems.