Effect of hydrogen blending on the energy capacity of natural gas transmission networks

Galyas, Anna Bella; Kis, László; Tihanyi, László; Székely, István; Vadászi, Marianna; Koncz, Adam

doi:10.1016/j.ijhydene.2022.12.198

Cited by 36 publications

(2 citation statements)

References 40 publications

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“…Nowadays, blending green hydrogen (e.g., that produced by electrolysis from renewable energy sources) in the Natural Gas (NG) infrastructures is assuming increasing interest within Distribution System Operators (DSO), aiming at reaching the decarbonization objectives. However, this practice influences the quality of the gas supplied and particularly its thermophysical properties such as density, specific heat and gross calorific value [ 8 , 9 , 10 , 11 ]. Therefore, consequences on the appliances at end-user’s level are likely [ 12 ], as well as potential inaccuracies of the domestic gas meters in distribution networks [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Reliability of Domestic Gas Flow Sensors with Hydrogen Admixtures

Ficco,

Dell’Isola,

Graditi

et al. 2024

Sensors

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Static flow sensors (e.g., thermal gas micro electro-mechanical sensors—MEMS—and ultrasonic time of flight) are becoming the prevailing technology for domestic gas metering and billing since they show advantages in respect to the traditional volumetric ones. However, they are expected to be influenced in-service by changes in gas composition, which in the future could be more frequent due to the spread of hydrogen admixtures in gas networks. In this paper, the authors present the results of an experimental campaign aimed at analyzing the in-service reliability of both static and volumetric gas meters with different hydrogen admixtures. The results show that the accuracy of volumetric and ultrasonic meters is always within the admitted limits for subsequent verification and even within those narrower of the initial verification. On the other hand, the accuracy of the first generation of thermal mass gas flow sensors is within the limits of the verification only when the hydrogen admixture is below 2%vol. At higher hydrogen content, in fact, the absolute weighted mean error ranges between 3.5% (with 5%vol of hydrogen) and 15.8% (with 10%vol of hydrogen).

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Section: Introductionmentioning

confidence: 99%

Reliability of Domestic Gas Flow Sensors with Hydrogen Admixtures

Ficco,

Dell’Isola,

Graditi

et al. 2024

Sensors

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“…Simultaneously, hydrogen storage and planned gradual increase of hydrogen concentration in natural gas are now the focus of the energy sector, as they correspond to current trends and future prospects (Aftab et al, 2022;Cristello et al, 2023;Galyas et al, 2023). The development of a hydrogen economy is one of the key pillars of the European Green Deal.…”

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confidence: 99%

Microbiological insight into various underground gas storages in Vienna Basin focusing on methanogenic Archaea

Hanišáková,

Vítězová,

Vítěz

et al. 2023

Front. Microbiol.

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In recent years, there has been a growing interest in extending the potential of underground gas storage (UGS) facilities to hydrogen and carbon dioxide storage. However, this transition to hydrogen storage raises concerns regarding potential microbial reactions, which could convert hydrogen into methane. It is crucial to gain a comprehensive understanding of the microbial communities within any UGS facilities designated for hydrogen storage. In this study, underground water samples and water samples from surface technologies from 7 different UGS objects located in the Vienna Basin were studied using both molecular biology methods and cultivation methods. Results from 16S rRNA sequencing revealed that the proportion of archaea in the groundwater samples ranged from 20 to 58%, with methanogens being the predominant. Some water samples collected from surface technologies contained up to 87% of methanogens. Various species of methanogens were isolated from individual wells, including Methanobacterium sp., Methanocalculus sp., Methanolobus sp. or Methanosarcina sp. We also examined water samples for the presence of sulfate-reducing bacteria known to be involved in microbially induced corrosion and identified species of the genus Desulfovibrio in the samples. In the second part of our study, we contextualized our data by comparing it to available sequencing data from terrestrial subsurface environments worldwide. This allowed us to discern patterns and correlations between different types of underground samples based on environmental conditions. Our findings reveal presence of methanogens in all analyzed groups of underground samples, which suggests the possibility of unintended microbial hydrogen-to-methane conversion and the associated financial losses. Nevertheless, the prevalence of methanogens in our results also highlights the potential of the UGS environment, which can be effectively leveraged as a bioreactor for the conversion of hydrogen into methane, particularly in the context of Power-to-Methane technology.

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Heterobimetallic Synergism in Triple‐Redox 2D Framework for Largely Boosted Water Oxidation and Flanked Carboxylic‐Acid‐Triggered Unconventional Tandem Catalysis

Chand,

Karmakar,

Kundu

et al. 2024

Small

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A fish‐bone‐shaped and thermochemically stable 2D metal‐organic framework (MOF) with multimodal active center‐decked pore‐wall is devised. Redox‐active [Co2(COO)4] node and thiazolo[5,4‐d]thiazole functionalization benefit this mixed‐ligand MOF exhibiting electrochemical water oxidation with 375 mV overpotential at 10 mA cm−2 current density and 78 mV per dec Tafel slope in alkaline medium. Pair of oppositely oriented carboxylic acids aids postmetalation with transition metal ions to engineer heterobimetallic materials. Notably, overpotential of Ni2+ grafted triple‐redox composite reduces to 270 mV with twofold declined Tafel slope than the parent MOF, ranking among the best‐reported values, and outperforming majority of related catalysts. Significantly, turnover frequency and charge transfer resistance display 35.5 and 1.4‐fold upsurge, respectively, with much uplifted chronopotentiometric stability and increase active surface area owing to synergistic Co(II)–Ni(II) coupling. The simultaneous presence of ─COOH and nitrogen‐rich moieties renders this hydrogen‐bonded MOF as acid–base synergistic catalyst for recyclable deacetalization‐Knoevenagel reaction with >99% product yield under solvent‐free mild condition. Besides control experiments, unique role of ─COOH as hydrogen‐bond donor site in substrate activation is validated from comparing the performances of molecular‐shearing approach‐derived structurally similar unfunctionalized MOF, and the heterobimetallic composite. To the best of tandem Knoevenagel condensation, larger‐sized acetal exhibits poor yield of α,β‐unsaturated dicyanides, and demonstrates pore‐fitting‐mediated size‐selectivity.

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Effect of hydrogen blending on the energy capacity of natural gas transmission networks

Cited by 36 publications

References 40 publications

Reliability of Domestic Gas Flow Sensors with Hydrogen Admixtures

Reliability of Domestic Gas Flow Sensors with Hydrogen Admixtures

Microbiological insight into various underground gas storages in Vienna Basin focusing on methanogenic Archaea

Heterobimetallic Synergism in Triple‐Redox 2D Framework for Largely Boosted Water Oxidation and Flanked Carboxylic‐Acid‐Triggered Unconventional Tandem Catalysis

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