The Hydrogen Economy is one proposed model for decarbonizing the hydrocarbon industry while still utilizing much of its infrastructure. One anchor of our current hydrocarbon industry in the US and Canada is the fleet of 635 porous media and salt cavern facilities where natural gas is stored on a seasonal cycle. Because the energy per unit volume of hydrogen is approximately one-third of...
Geological H2 storage enables long-term (days to months) energy storage and grid services for both grid and off-grid energy feedstock (e.g., solar and wind). Scalable, cost-effective H2 storage can dramatically increase the efficiency of carbon-free energy and further promote usage. Economic storage requires minimizing losses by diffusion through the caprock and contamination by methane and...
To reduce carbon emissions, transitioning the energy system from traditional fossil fuels to clean energy sources is crucial. Hydrogen energy has emerged as a highly promising clean energy option, attracting increasing attention. However, one of the primary challenges hindering the development of hydrogen energy is its storage. Underground hydrogen storage (UHS) has become a vital technology...
Hydrogen storage in depleted natural gas reservoirs is a promising solution for storing excess renewable energy on a timescale longer than can be accommodated by salt cavern storage. However, commercial exploitation of the technology in question, and the associated repurposing of an otherwise "dead asset," awaits the resolution of key challenges and uncertainties. Chief among these from a...
Hydrogen has been recognized as a crucial energy carrier to reduce greenhouse gas emissions and facilitate the transition to a sustainable energy future. However, meeting the fluctuating energy demands solely through hydrogen production is not always feasible, necessitating the development of reliable storage solutions. Underground hydrogen storage (UHS) offers a promising approach to balance...
Abstract. The conventional gravimetric and volumetric methods used for gas adsorption analyses are unable to differentiate between adsorbed and free gas behaviors and often rely on estimated adsorbed gas densities from molecular simulations for high-pressure corrections. This study introduces a novel approach using low-field Nuclear Magnetic Resonance NMR to gain deeper insights into...
The imperative shift towards a decarbonized hydrogen economy necessitates a transition from the current reliance on unabated fossil fuel-based hydrogen production, which results in significant CO2 emissions. This study proposes a novel approach to address this challenge by introducing a groundbreaking concept for the simultaneous separation of hydrogen (H2) and permanent storage of carbon...
Underground H2 storage in saline aquifers is critical for advancing the global energy transition through large-scale H2 utilization. However, cyclic stress-induced nano-cracks in caprocks may lead to leakage due to H2’s small size and high diffusivity. This study employed molecular dynamics simulations exploring the occurrence states of H2 and H2O near kaolinite surfaces, particularly focusing...
