Rare earth corrosion inhibitors in hydrogen production and storage systems
Role
Principal Investigator
Description
This project is an internally funded project for a near miss ARC Discovery Grant, which was within 10% of those who missed. This project addresses corrosion and embrittlement of steel in hydrogen storage facilities, a new dimension in the world-wide multi-trillion dollar problem of the corrosion of steel. With the emerging hydrogen economy, new infrastructure for hydrogen storage will need to be constructed. It has been recently found that hydrogen gas can decompose to hydrogen atoms on the surface of the steel on the inner lining of storage vessels, and impregnate the infrastructure, and therefore compromising the integrity of the high pressure storage vessels. Defects in hydrogen storage facilities can therefore lead to catastrophic failure of hydrogen energy infrastructure. The project will enhance the capacity of rare earth carboxylate corrosion inhibitors, which are an inexpensive and green solution, to mitigate both corrosion and hydrogen embrittlement of steel, and provide an understanding of the protection process. The benefits of this project will ultimately be a new bulk use for Australia’s abundant rare earth resources and new chemical manufacturing to produce the inhibitors. The project aligns with JCU’s major theme of “Industries and economies in the tropics” particularly relevant with the proposed Townsville Region Hydrogen Hub, a $70M Australian Government investment. Furthermore, the rare earth metals are classified as critical metals, and the project aligns with the Critical Metals Trailblazer project. The project requires bulk amounts of corrosion inhibitors for assessment. The most expensive items are lanthanoid salts (all REs required) for the synthesis of lanthanoid carboxylates. Listed costs for rare earth chlorides and nitrates follow as examples, but carbonates and acetates are required for optimising procedures. The metal costs are (quotes are for the least expensive to most expensive chlorides and nitrates): lanthanoid chlorides range from $209/100g for CeCl3 to $1580/5g for ScCl3 while nitrates are $127/100g for Ce(NO3)3 to $975/5g for Sc(NO3)3. For optimum inhibitor systems, all 16 rare earths will need to be. For brevity, we do not quote all prices here, but chlorides total ca $5800, while nitrates total ca $4400. Organic supporting ligands are estimated to cost ca. $3,000. Analysis costs are included below. Travel to Melbourne is planned to meet with our Monash and Deakin collaborators to draft the next grant proposal.
Date
01 Jul 2024 - 30 Jun 2025
Project Type
INTERNAL_RESARCH_GRANT
Keywords
Contuinuity Grant
Funding Body
James Cook University
Amount
0
Project Team
Zhifang Guo