The catalyst enables hydrogen production at 300°C lower than conventional thermal methane cracking processes, improving hydrogen productivity by 50%.
Researchers from the Korea Institute of Energy Research (KIER), led by Dr. Woohyun Kim, have developed an innovative nickel-cobalt composite catalyst that significantly improves the production of turquoise hydrogen, a cleaner alternative to conventional hydrogen production methods.
This advancement allows hydrogen to be generated at temperatures 300°C lower than traditional thermal methane cracking processes, increasing productivity by an impressive 50%.
The research, published in the November issue of the esteemed journal Fuel Processing Technology, highlights this catalytic process’s dual benefits.
It efficiently produces hydrogen and generates carbon nanotubes, a valuable byproduct used in various applications, including electrode materials for solar cells and batteries.
Nickel-cobalt catalyst
Turquoise hydrogen is produced by thermally decomposing methane (CH₄) into hydrogen and solid carbon without emitting carbon dioxide during production.
This technology is essential in raising environmental concerns since it offers a cleaner approach than the more common gray hydrogen technology, which releases greenhouse gases.
In 2021, the South Korean government unveiled the “First Hydrogen Economy Implementation Plan,” targeting a domestic supply of 28 million tons of clean hydrogen by 2050. The focus on developing sustainable hydrogen production methods is gaining momentum, particularly in reducing greenhouse gas emissions.
Despite the promise of turquoise hydrogen, its commercialization has faced challenges, primarily due to the high temperatures required for the production reaction—typically around 900°C—and the limited applications for the resulting solid carbon.
Existing nickel- and iron-based catalysts need more activity at lower temperatures, hindering efficiency and feasibility.
To address these issues, Dr. Kim and his team experimented with adding cobalt to a nickel-based catalyst.
Their research revealed that 8% nickel and 2% cobalt composition maximized hydrogen production efficiency while allowing the reaction to occur at a much lower temperature of 600°C.
The new catalyst demonstrated over 50% greater hydrogen productivity than earlier models, based on initial activity tests conducted in the first 30 minutes.
Notably, this catalyst’s active phase lasts significantly longer—approximately 150 minutes, compared to 90 minutes for previous variants.
This impressive durability means it can sustain hydrogen production for longer, making it a promising solution for industrial applications.
Boosts yield by 50%
Additionally, the emergence of carbon nanotubes on the catalyst’s surface after the reaction signifies successful hydrogen production and presents an opportunity for creating high-value carbon materials.
These nanotubes can be utilized in various sectors, enhancing the economic viability of the hydrogen production process.
In comments on the research, Dr. Kim remarked, “This study marks a significant milestone, enabling simultaneous hydrogen and carbon nanotube production, thus achieving economic efficiency and productivity.”
He further emphasized the team’s commitment to advancing mass production techniques using this catalyst, ongoing performance evaluations, and developing essential technologies for reaction systems.
KIER’s findings showcase a viable pathway toward generating cleaner hydrogen—a crucial element in achieving global carbon neutrality—and underline the potential for innovative solutions that can support sustainable energy systems in the future.
The implications of this research extend beyond laboratory success, promising real-world applications that align with South Korea’s ambitious clean energy goals.
As the world shifts toward cleaner energy solutions, advancements like these in turquoise hydrogen technology are vital in ensuring a sustainable future.