Abstract
With ever-growing need for decarbonization, the role of (clean) hydrogen in clean energy transition has been gaining more interest and recognized at many levels, from global and sectoral climate goals and targets to clean energy bills and many roadmaps to net-zero scenarios, all of which necessitate a clear, unambiguous definition for clean hydrogen. This talk aims to expand the dialogue on the clean hydrogen with a focus on transitioning from traditional color-coded descriptions to new definitions that account for carbon intensity of the hydrogen production. The limitations of the color-coding concept will be discussed by providing a refined critique and assessment of categorizing hydrogen production pathways within the context of associated carbon intensity from a life-cycle perspective. Key findings and projections from recent major reports and roadmaps will also be highlighted with key numbers and targets to elucidate the role of hydrogen in transforming the decarbonization of many key sectors.
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