Equilibrium distribution and diffusion of mixed hydrogen-methane gas in gravity field

Peng, Shiyao; He, Qiao; Peng, Ducheng; Ouyang, Xin; Zhang, Xiaorui; Chai, Chong; Zhang, Lianlai; Sun, Xu; Deng, Huiqiu; Hu, Wangyu; Hou, Jie

doi:10.1016/j.fuel.2023.130193

Cited by 6 publications

(1 citation statement)

References 28 publications

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“…Azatyan et al 23 used the Boltzmann distribution to analyze hydrogen−propane mixtures and proposed that in the absence of convection effects, stratification induced by gravity can be neglected. Peng et al 24 carried out molecular dynamic simulations and found no stratification under normal gravitational conditions. However, when the gravitational acceleration was increased, weak clustering of the methane molecules was observed.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Mathematical Models for Describing the Distribution of Hydrogen-Enriched Natural Gas in Enclosed Spaces

Su,

Li,

et al. 2024

Energy Fuels

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This study focuses on the investigation of stratification phenomena during the transportation and storage of hydrogen-enriched natural gas (HENG) in enclosed spaces. Two mathematical models, namely, the species transport model and the multiphase mixture model, are commonly used to describe the stratification phenomena of HENG. To evaluate the suitability of both models in simulating the stratification phenomena of HENG, the model accuracy was initially validated by comparing with published experimental data. Subsequently, the spontaneous concentration distribution trend in a binary gas mixture (hydrogen + methane) system within an enclosed space is analyzed based on the principles of minimum energy. The findings indicate that the species transport model is more suitable for describing the distribution of HENG in enclosed spaces; the HENG mixture gradually attains uniform concentration distribution when it remains static and eventually reaches equilibrium without any obvious concentration stratification. This study aims at offering valuable insights for ensuring safe transportation and storage of HENG.

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Section: Introductionmentioning

confidence: 99%