The pipeline for low-carbon hydrogen projects has shrunk considerably from a year ago, the International Energy Agency (IEA) said in its Global Hydrogen Review, which was published this week.

The IEA’s estimate, based on project announcements, now stands at 37 million tons per annum (MMtpa) by 2030, down from 49 MMtpa in the previous year’s report. It’s the first time the IEA’s pipeline has fallen year-over-year. As we’ve noted in our weekly Hydrogen Billboard report, several U.S. projects have been canceled or shelved since the beginning of the year.

Green hydrogen projects were responsible for more than 80% of the decline. Green hydrogen is produced by running water through an electrolyzer powered by renewable energy. Blue hydrogen projects made up the rest of the decline. Blue hydrogen is typically produced by running natural gas through a steam methane reformer (how conventional, or gray, hydrogen is produced), then capturing the emissions through carbon capture and sequestration (CCS).

As shown on the left chart below, most of the projects in the IEA’s pipeline are in the early stages of development, with only a fraction having reached a final investment decision (FID) or operational. As shown on the right chart below, a majority of the projects in the pipeline are considered to be uncertain or low potential, with few almost certain or operational.

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