Hydrogen–methane mixtures: Dispersion and stratification studies

Marangon, Alessia; Carcassi, Marco Nicola Mario

doi:10.1016/j.ijhydene.2013.10.159

Cited by 34 publications

(9 citation statements)

References 3 publications

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“…In this section, the accuracy of the species transport model and the multiphase mixture model, both implemented in ANSYS Fluent 19.2, is assessed by comparing their simulation results of the mixing and stratification processes of hydrogen and natural gas to published experimental data. 40 conducted an experimental study on the injection of hydrogen and methane mixtures in an enclosed space. The experimental setup consisted of a cubic chamber with a volume of 25 m 3 .…”

Section: Comparative Study With Experimental Resultsmentioning

confidence: 99%

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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: Comparative Study With Experimental Resultsmentioning

confidence: 99%

“…Marangon and Carcassi conducted an experimental study on the injection of hydrogen and methane mixtures in an enclosed space. The experimental setup consisted of a cubic chamber with a volume of 25 m 3 .…”

Section: Comparative Study With Experimental Resultsmentioning

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

View full text Add to dashboard Cite

show abstract

“…In the experiments with slow or fast ventilation, non-uniform concentration of the gas The potential for interaction between the two gases in the methane-hydrogen mixture is also important in pipeline transportation and end-use applications. Marangon and Carcassi [14] investigated the dispersion and stratification properties of hydrogen and methane mixtures in a large-scale apparatus (dimensions: 3.23 m length, 2.75 m width and 2.81 m height) under ventilated and non-ventilated conditions. Gas chromatographs and sensors were used to analyze gas concentrations at different locations in the container.…”

Section: Properties Of Methane-hydrogen Blendsmentioning

confidence: 99%

Hydrogen Blending in Gas Pipeline Networks—A Review

et al. 2022

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Replacing fossil fuels with non-carbon fuels is an important step towards reaching the ultimate goal of carbon neutrality. Instead of moving directly from the current natural gas energy systems to pure hydrogen, an incremental blending of hydrogen with natural gas could provide a seamless transition and minimize disruptions in power and heating source distribution to the public. Academic institutions, industry, and governments globally, are supporting research, development and deployment of hydrogen blending projects such as HyDeploy, GRHYD, THyGA, HyBlend, and others which are all seeking to develop efficient pathways to meet the carbon reduction goal in coming decades. There is an understanding that successful commercialization of hydrogen blending requires both scientific advances and favorable techno-economic analysis. Ongoing studies are focused on understanding how the properties of methane-hydrogen mixtures such as density, viscosity, phase interactions, and energy densities impact large-scale transportation via pipeline networks and end-use applications such as in modified engines, oven burners, boilers, stoves, and fuel cells. The advantages of hydrogen as a non-carbon energy carrier need to be balanced with safety concerns of blended gas during transport, such as overpressure and leakage in pipelines. While studies on the short-term hydrogen embrittlement effect have shown essentially no degradation in the metal tensile strength of pipelines, the long-term hydrogen embrittlement effect on pipelines is still the focus of research in other studies. Furthermore, pressure reduction is one of the drawbacks that hydrogen blending brings to the cost dynamics of blended gas transport. Hence, techno-economic models are also being developed to understand the energy transportation efficiency and to estimate the true cost of delivery of hydrogen blended natural gas as we move to decarbonize our energy systems. This review captures key large-scale efforts around the world that are designed to increase the confidence for a global transition to methane-hydrogen gas blends as a precursor to the adoption of a hydrogen economy by 2050.

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“…To evaluate the behavior of methane-hydrogen mixtures during their long stay in the pipeline system, experiments were carried out to determine the level of stratification of these mixtures. The experiments were carried out in closed cubic apparatus with a volume of 25 m 3 both under natural ventilation conditions and without it [110]. Two fuel mixtures were tested: 10% hydrogen: 90% methane and 30% hydrogen: 70% methane.…”

Section: Safety Problems Of Using Of Hydrogen and Methane-hydrogen Mi...mentioning

confidence: 99%

A Comprehensive Review on the Prospects of Using Hydrogen–Methane Blends: Challenges and Opportunities

et al. 2022

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An analysis of the literature data indicates a wide front of research and development in the field of the use of methane–hydrogen mixtures as a promising environmentally friendly low-carbon fuel. The conclusion of most works shows that the use of methane–hydrogen mixtures in internal combustion engines improves their performance and emission characteristics. The most important aspect is the concentration of hydrogen in the fuel mixture, which affects the combustion process of the fuel and determines the optimal operating conditions of the engine. When using methane–hydrogen mixtures with low hydrogen content, the safety measures and risks are similar to those that exist when working with natural gas. Serious logistical problems are associated with the difficulties of using the existing gas distribution infrastructure for transporting methane–hydrogen mixtures. It is possible that, despite the need for huge investments, it will be necessary to create a new infrastructure for the production, storage and transportation of hydrogen and its mixtures with natural gas. Further research is needed on the compatibility of pipeline materials with hydrogen and methane–hydrogen mixtures, safety conditions for the operation of equipment operating with hydrogen or methane–hydrogen mixtures, as well as the economic and environmental feasibility of using these energy carriers.

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Hydrogen–methane mixtures: Dispersion and stratification studies

Cited by 34 publications

References 3 publications

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

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

Hydrogen Blending in Gas Pipeline Networks—A Review

A Comprehensive Review on the Prospects of Using Hydrogen–Methane Blends: Challenges and Opportunities

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