This report deals comprehensively with odorization of hydrogen, either pure or mixed with natural gas (H2-NG), and analyses different alternatives for this purpose. The main objective of this document prepared by Marcogaz is to contribute to determine the main factors and data to be taken into account when odorizing gases containing hydrogen.

In this study, Enagás and CIME (Centro de Investigación en Materiales Estructurales) of the Universidad Politécnica de Madrid evaluate and validate the potential repurposing of existing gas pipelines of the natural gas backbone network for hydrogen transport. The tests carried out and their results, which reproduce real operating conditions, have made it possible to validate the system and test procedure developed jointly under an R&D programme. The validation of this experimental procedure already allows tests to be carried out in a hydrogen atmosphere under the same conditions in which the future hydrogen network will operate.

Final report of Hydrogen in Gas Grids (HIGGS), a project financed by the European Union, which yields positive conclusions on the potential of injecting hydrogen into the natural gas grid at high pressure through tests on its equipment and materials. The experimental results, under test conditions, determine that the pipelines are compatible with up to 100% hydrogen injection.

ticle by scientists at the University of California-Riverside explaining the new low-cost technology they have developed to improve the efficiency of catalytic converters in hydrogen engines, thus reducing the emission of nitrogen oxides. 

This research analyses the thermal performance of multi-layered insulation (MLI) structures in liquid hydrogen tanks and provides technological solutions to optimise storage efficiency.

This document, prepared by the working groups of the Spanish Hydrogen Technology Platform with the support of its Technical Secretary, summarizes the analysis of the hydrogen technologies situation in Spain in 2024 and considers all the stages of this vector value chain focused on R&D&I.

The Spanish Hydrogen Association (AeH2) analyzes the census of its projects for the year 2024, based on data provided by its members. The projects are being developed in different areas: research, development in a relevant environment, demonstrators in a real environment and commercial. 

European Pipeline Research Group (EPRG) summarizes best practices for small-scale fracture toughness testing of carbon steel as a material for high-pressure hydrogen transport infrastructure. It suggests a test methodology that follows the ASTM E1820 standard and refines and complements ANSI/CSA CHMC-1. 

H2GAR (H2 Gas Assets Readiness) publishes this document to serve as a guide for the design of hydrogen metering stations connected to the transport network. Aspects such as legal metrology, regulatory requirements and technology options are discussed. The report, which reflects the progress of the H2GAR 2024 metering working group and the current knowledge in this field of the European TSOs that are part of this initiative, will be updated as new developments and perspectives emerge, to ensure alignment with industry developments and best practices.