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Variations of fuel composition during storage at Liquefied Natural Gas refuelling stations
RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry, Materials and Surfaces.
RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry, Materials and Surfaces.
Fordonsgas Sverige AB, Sweden.
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2018 (English)In: Journal of Natural Gas Science and Engineering, ISSN 1875-5100, E-ISSN 2212-3865, Vol. 49, p. 317-323Article in journal (Refereed) Published
Abstract [en]

Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) utilization within the heavy duty transport sector is today a sustainable alternative to the use of oil. However, in spite of the high degree of insulation in the storage tank walls, it is impossible to fully avoid any net heat input from the surroundings. Due to some degree of vaporization this results in variation in gas composition during storage at refuelling stations, potentially leading to engine failures. Within this study, a vaporizer/sampler has been built and tested at a station delivering liquefied biomethane (LBG) and occasionally; such in this case, LNG to heavy and medium duty trucks. The vaporizer/sampler has then been used to study the variation of the LNG composition in the storage tank during a two weeks period. The results clearly underline a correlation between the gas phase and the liquid phase as the concentration changes follow the same trend in both phases. Two opposite effects are assumed to influence the concentration of methane, ethane and propane in the liquid and in the gas phase. On one hand, because of the probable presence of not fully mixed layers in the storage tank and due to vehicles being refuelled, both liquid and gas phases are enriched in methane at the expense of ethane and propane. On the other hand, due to boil-off effect towards the end of the storage period, both liquid and gas phases are enriched in ethane and propane at the expense of methane.

Place, publisher, year, edition, pages
2018. Vol. 49, p. 317-323
Keyword [en]
Ageing, Composition, LBG, LNG, Refuelling station, Chemical analysis, Ethane, Fuel storage, Gas fuel purification, Gases, Liquefied natural gas, Liquids, Methane, Natural gas, Natural gas transportation, Propane, Tanks (containers), Vaporization, Concentration change, Fuel compositions, Gas compositions, Liquefied Natural Gas (LNG), Liquid and gas phasis, Transport sectors, Gas fuel storage
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33264DOI: 10.1016/j.jngse.2017.11.014Scopus ID: 2-s2.0-85035751251OAI: oai:DiVA.org:ri-33264DiVA: diva2:1182101
Note

 Funding details: EURAMET, European Association of National Metrology Institutes; Funding details: ENG 60 LNG; Funding text: This paper is written under the European Metrology Research Programme (EMRP) project ENG 60 LNG II Metrological support for LNG custody transfer and transport fuel applications , and the authors would like to acknowledge the funding of this Programme by EURAMET (European Association of National Metrology Institutes) and the European Commission . In addition, the authors are grateful to Fordonsgas AB who made their station available for the tests performed in this study.

Available from: 2018-02-12 Created: 2018-02-12 Last updated: 2018-02-12Bibliographically approved

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