Hydrogen (H 2) is currently considered a clean fuel to decrease anthropogenic greenhouse
gas emissions and will play a vital role in climate change mitigation. Nevertheless, one of …

Underground hydrogen storage (UHS) is a promising technology with which large quantities
of H 2 can potentially be stored in the subsurface safely, economically and efficiently. As …

Abstract Underground hydrogen (H 2) storage (UHS) and carbon dioxide (CO 2) geo-
storage (CGS) are prominent methods of meeting global energy needs and enabling a low …

Surface wettability is a key factor controlling the CO 2 seal capacity and defines the CO 2
storage potential. Limited studies have addressed the shale/water wettability behavior …

Electrocatalysis, as a typical heterogeneous catalysis, generally occurs in the di-or tri-phase
interfaces. Wettability is an important property for describing the balance of a gas-liquid-solid …

In gas geo-storage operations, the injected ex-situ gas will displace the in-situ formation
brine and partially occupy the porous space of the target rock. In case of water-wet rock, the …

A droplet impacting hydrophobic/superhydrophobic surfaces undergoes spreading,
recoiling, and rebounding. All these phenomena are affected by the energy exchange …

Osmotic pressure (P osmotic) is an important mechanism for fracturing fluid loss in clay-rich
unconventional reservoirs. Surfactant is often added to the fracturing fluid to control this loss …

Underground hydrogen storage (UHS) is gaining interest as a secure, long-term solution for
storing hydrogen in porous geological formations. In UHS, a cushion gas like CO 2 is crucial …

Wettability in the methane (CH4)–liquid–rock system is a key parameter which determines
gas recovery and geo-storage efficiencies. However, there is a lack of an overview over this …