Ammonia Storage in Metal Ammines

Presented on August 22, 2016 during the NH3 Fuel Conference 2016

Authors Jawza Alnawmasi Duncan Gregory University of Glasgow

Download this Presentation A PDF of this paper is not currently available.

Abstract

Ammonia has attracted interest as a promising alternative fuel for internal combustion engines due to the fact that ammonia does not release carbon dioxide during combustion.^[1] Storing ammonia in the form of metal ammines is the most notable way to overcome the challenges that are related to the use of NH3 in liquid form, namely the toxicity and corrosive nature of ammonia.^[2] Ammine complexes of light transition metal halides (such as Co, Ni) are very promising candidates because they exhibit high ammonia contents and they are relatively stable at room temperature.

The CoX₂ system is an interesting candidate, especially cobalt chloride, as it possesses a NH3 capacity of 44 wt. % and desorption is completed by 330 °C. We are currently investigating the chemical and structural properties of the Co halides during ammonia-uptake at ambient conditions and ammonia-release (upon heating). The ammoniated metal halides were studied by powder X-ray diffraction, FTIR and Raman spectroscopy. The crystal structure of hexammine has been determined and the products of the first and second decomposition steps were confirmed as diamine and monoamine. The thermal properties of the hexammine cobalt halides were studied by TPD (TG-DTA-MS) measurements. These measurements were intended to investigate their deammoniation properties and the products of decomposition. In addition, the cycling behaviour and the stability of the ammonited cobalt chloride in air were also investigated.

[1] Steele, R. B. Chemtech 1999, (August), 28.
[2] C. H. Christensen, R. Z. Sørensen, T. Johannessen, U. J. Quaade, K. Honkala, T. D. Elmøe, R. Køhler, J. K. Nørskov, J. Mater. Chem., 2005, 15, 4106–4108.

Topics Energy Storage

Authors j.alnawmasi.1@research.gla.ac.uk duncan.gregory@glasgow.ac.uk

Madoqua Power2X webinar on Tuesday, November 26

Please join us for this informative webinar. Click here to register and get the details!

Annual Conference highlights industry advancements

It was an exciting three days in New Orleans with 300 attendees from 22 countries participating in our 21st AEA Annual Conference. Thank you to our generous sponsors and to all those who attended the conference. Stay tuned for a recap of the events and sessions. Presentations from all the sessions will be posted shortly.

Featured content

In 2023, AEA reached many milestones. Read about them in our 2023 Annual Report.