Lightning, Fertiliser, and the Future of Green Nitrogen with Professor PJ Cullen (440)

In this episode, Professor PJ Cullen, Chemical Engineering expert from the University of Sydney, breaks down the global nitrogen challenge. We explore why nitrogen is essential for life, the history of fertiliser - from the Guano Wars to the energy-intensive Haber-Bosch process - and how today's nitrogen production is harming the planet. Cullen introduces PlasmaLeap, his startup using non-thermal plasma to mimic lightning and fix nitrogen sustainably. We also dive into the risks of nitrogen storage, the 2020 Beirut explosion, and the urgent need to electrify chemical industries.  https://www.plasmaleap.com/ Linkedin: PJ Cullen

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- Lightning, Fertiliser, and the Future of Green Nitrogen with Professor PJ Cullen (440)

Lightning, Fertiliser, and the Future of Green Nitrogen with Professor PJ Cullen (440)

Aug 23, 2025

In this episode, Professor PJ Cullen, Chemical Engineering
expert from the University of Sydney, breaks down the global
nitrogen challenge. We explore why nitrogen is essential for life,
the history of fertiliser - from the Guano Wars to the
energy-intensive Haber-Bosch process - and how today's nitrogen
production is harming the planet. Cullen introduces PlasmaLeap, his
startup using non-thermal plasma to mimic lightning and fix
nitrogen sustainably. We also dive into the risks of nitrogen
storage, the 2020 Beirut explosion, and the urgent need to
electrify chemical industries.

https://www.plasmaleap.com/

Linkedin: PJ Cullen

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Dr Karl’s a curious optimist – a great combination for a science lover. Join him and his guests for weird facts, amazing conversation and remember, it’s never too late for a happy childhood.
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