Introduction to the IPHE Methodology

This briefing provides an introduction to the IPHE methodology for determining the greenhouse gas (GHG) emissions associated with the production of hydrogen. The purpose of this paper is to inform regulatory authorities and private sector stakeholders in potential hydrogen-producing countries about the content, context, and relevance of the IPHE methodology.

Information provided in this briefing focusses on the production of hydrogen from electrolysis of water using electricity. However, the IPHE methodology also describes methods to determine GHG emissions for other hydrogen production pathways.

The main questions discussed in this briefing are:

• What is the IPHE methodology and to which extent could it become relevant?
• Which provisions are made and what is the overall scope of the methodology?
• What data needs to be reported by hydrogen producers?
• What are possible shortcomings of the methodology and how could they be addressed?