#44 How Green is Blue Hydrogen? (with Prof. Robert W. Howarth, Cornell University)

Robert Warren Howarth is a professor and earth system scientist at Cornell University (USA), and is also member of the Climate Action Council appointed by the State of New York. In 2021, Howarth and Stanford Professor Mark Z. Jacobson, stirred up controversy with their paper, "How Green is Blue Hydrogen?"

Their study found that the production of blue hydrogen results in significant greenhouse gas emissions, both carbon dioxide and unburned fugitive methane, which is a major contributor to climate change. Even with carbon capture and storage (CCS) technology, the emissions associated with blue hydrogen are still substantial, argue Howarth and Jacobson.

The peer-reviewed paper sparked a lot of reactions. Among others, researchers here at NTNU later published a Comment on “How green is blue hydrogen?”, questioning Howarth and Jacobson's methods for computing the energy balance of blue hydrogen plants, and saying the assumed methane leakage in the United States cannot represent all natural gas and blue hydrogen value chains globally.

Has the dust now settled? We sat down and had a chat with Professor Robert W. Howarth, to find out.

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Next week, we are organizing the NTNU Energy Transition Week 2023 in Trondheim, Norway. The week features our annual conference, energy transition-related networking events, a town hall assembly, and expert-led workshops with different focus areas.

Are you a young professional and want to accelerate the energy transition in Norway. If yes, then join me, Dr. Julius Wesche, on March 20th for the first face-to-face meeting of the Green Energy shifters network (www.greenenergyshifters.no).