Gas recycling technology

ABB has developed a technology for the comprehensive recycling of contaminated SF₆ (sulfur hexafluoride) gas, based on an energy-efficient cryogenic process.The new technology, developed by an Australian team at ABB’s Moorebank, NSW, facility, will be implemented at a dedicated SF₆ gas recycling centre at Moorebank. Australia will be the first country in a global rollout of this new technology.

Purity of recycled SF₆ gas using the newly developed technology is ~99.99%. This exceeds the purity that can be achieved using traditional methods and removes the need for costly and energy-intensive gas destruction. Using recycled SF₆ gas will help reduce carbon emissions and could result in a cost-saving potential of up to 30%.

“This breakthrough actively supports a complete life cycle management approach, improving asset optimisation and performance while reducing environmental impact in a cost-effective manner,” said Axel Kuhr, Country Manager for ABB in Australia. “It is yet another example of how ABB remains at the forefront of technology and innovation and a great example of Australia’s contribution to ABB’s global R&D program.”

SF₆ gas is extensively used in the electrical industry for dielectric insulation and current interruption in circuit breakers, switchgear and other electrical equipment. Pressurised SF₆ gas is used for the safe and reliable operation of gas-insulated switchgear as it has a much higher dielectric strength than air or dry nitrogen, making it possible to significantly reduce product footprint and enable installation in constrained spaces. However, its life cycle management is a challenge for utility and industrial users. The cost of handling SF₆ in a compliant manner can also be substantial, particularly when decommissioning ageing substations.

The new service offering will see contaminated SF₆ gas recycled into technical-grade standard (according to IEC 60376 standards) for re-use using approved handling practices that do not allow the escape of SF₆ gas into the atmosphere. The service also covers monitoring to ensure compliance with changing local and international regulations and standards.