While aviation may be converging on one main pathway to decarbonization — sustainable aviation fuel — maritime shipping may require a more diverse set of solutions: a portfolio of fuels, energy efficiency, and on-board carbon capture and storage.
But each technology has operational and capital challenges. So what will it take to scale them up?
In this episode, Shayle talks to Dr. Lynn Loo, CEO of the Global Centre for Maritime Decarbonisation. Ocean-going shipping consumes about 300 million tons of fuel per year, accounting for 3% of global emissions. But with significant regulatory pressure from bodies like the International Maritime Organization, shipping companies are exploring a range of options. Shayle and Lynn cover topics like:
Conventional fuels, like heavy fuel oil and marine gas oil
The inadvertent climate impact of cutting sulfur emissions
The pros and cons of lower-carbon fuels, like LNG, biofuels, methanol, and ammonia
The challenges for infrastructure and operations, especially involving the low volumetric energy density of new fuels
On-board carbon capture and storage
How energy efficiency reduces the impact of low volumetric energy density
Recommended resources
International Maritime Organization: Fourth Greenhouse Gas Study 2020
Catalyst: Heavy duty decarbonization
Catalyst: Putting a halt to geoengineering — by accident
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