# Hydrogen Storage — Compressed, Liquid, LOHC and Underground

**URL:** https://thecodex.expert/energy/hydrogen/storage/
**Session:** 30 | **Date:** 2026-05-05

## Summary

Hydrogen storage methods. H₂: 142 MJ/kg (3× petrol) but 0.01 MJ/L ambient (3,500× less than petrol by volume). Methods: (1) Compressed 700 bar: Type IV carbon fibre tanks, 10-15% compression energy loss, Toyota Mirai. (2) Liquid hydrogen -253°C (20K): 71 kg/m³ density, 25-35% liquefaction energy loss, Kawasaki Suiso Frontier (35.56N 139.83E Yokohama, world's first LH₂ carrier, Australia→Japan 2022). (3) Salt cavern: Teesside UK (54.57N 1.23W, Sabic, operational 1970s — world's first), Clemens Dome Texas (29.83N 94.23W, Praxair). (4) LOHC: dibenzyltoluene (Hydrogenious LOHC 49.60N 11.00E), MCH (Chiyoda SPERA 35.69N 139.75E), 20-30% round-trip loss. (5) Ammonia: Haber-Bosch conversion, existing global trade infrastructure, NEOM Helios (28.00N 35.50E, 650 t/day H₂ as NH₃). Ammonia vs LH₂ debate documented. Hydrogen embrittlement barrier for pipeline repurposing. HyDeploy UK (51.65N 1.30W, 20% H₂ blend tested). Sources: IEA Hydrogen Storage 2023, IRENA 2024, US DOE Hydrogen Program.