Cited by 499Maritime Transport Emissions and EfficiencyAdvanced Aircraft Design and TechnologiesHybrid Renewable Energy Systems

Decarbonising ships, planes and trucks: an analysis of suitable low-carbon fuels for the maritime, aviation and haulage sectors

Open access
Gray, Nathan, McDonagh, Shane, O'Shea, Richard, Smyth, Beatrice, Murphy, Jerry D·2021·Advances in Applied Energy

Abstract

The high environmental impacts of transport mean that there is an increasing interest in utilising low-carbon alternative energy carriers and powertrains within the sector. While electricity has been mooted as the energy carrier of choice for passenger vehicles, as the mass and range of the vehicle increases, electrification becomes more difficult. This paper reviews the shipping, aviation and haulage sectors, and a range of low-carbon energy carriers (electricity, biofuels, hydrogen, and electrofuels) that can be used to decarbonise them. Energy carriers were assessed based on their energy density, specific energy, cost, lifecycle greenhouse gas emissions, and land-use. In terms of haulage, current battery electric vehicles may be technically feasible, however the specific energy of current battery technology reduces the payload capacity and range when compared to diesel. To alleviate these issues, biomethane represents a mature technology with potential co-benefits, while hydrogen is close to competitiveness but requires significant infrastructure. Energy density issues preclude the use of batteries in shipping which requires energy dense liquids or compressed gaseous fuels that allow for retrofits/current hull designs, with methanol being particularly appropriate here. Future shipping may be achieved with ammonia or hydrogen, but hull design will need to be changed significantly. Regulations and aircraft design mean that commercial aviation is dependant on drop-in jet fuels for the foreseeable future, with power-to-liquid fuels being deemed the most suitable option due to the scales required. Fuel costs and a lack of refuelling infrastructure were identified as key barriers facing the uptake of alternatives, with policy and financial incentives required to encourage the uptake of low-carbon fuels.

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Crossref · 10.1016/j.adapen.2021.100008

Cites

103 of 103 references verified0 citation errors · 0 not checkable

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  • Methanol can serve as an energy carrier for maritime fuel or as a feedstock that can be upgraded to SAF.

    “Methanol is used as an example of an (intermediate) liquid fuel that can serve as an energy carrier for use as maritime fuel or as a feedstock that can be upgraded to SAF [20].”
  • Ideal characteristics for jet-alternative fuels are high energy density, high specific energy, high flash point, low emissions levels, low viscosities and freezing points, high thermal stability, and good lubrication properties.

    “high energy density, high specific energy (to enhance the efficiency), high flash point (to be safe), low emissions levels, low vis­ cosities and freezing points (to ensure the fuel quality at reduced tem­ peratures), high thermal stability and good lubrication properties [52].”
  • Ideal characteristics for maritime fuels are high energy density, low emissions levels, reduced production and use costs, scalability, and compatibility with actual infrastructure.

    “high energy density (to avoid the high storage volumes), low emissions levels, reduced production and use costs (to be attractive to replace the conventional ones), scalability (to be used for both short and long transport distances) and compatibility with actual infrastructure [52].”
  • Ideal characteristics for maritime fuels are high energy density, low emissions levels, reduced production and use costs, scalability, and compatibility with actual infrastructure.

    “high energy density (to avoid the high storage volumes), low emissions levels, reduced production and use costs (to be attractive to replace the conventional ones), scalability (to be used for both short and long transport distances) and compatibility with actual infrastructure [52].”
  • Ideal characteristics for jet-alternative fuels are high energy density, high specific energy, high flash point, low emissions levels, low viscosities and freezing points, high thermal stability, and good lubrication properties.

    “high energy density, high specific energy (to enhance the efficiency), high flash point (to be safe), low emissions levels, low vis­ cosities and freezing points (to ensure the fuel quality at reduced tem­ peratures), high thermal stability and good lubrication properties [52].”

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Research works printed but not linked: 4

  1. Cambridge Econometrics. Trucking into a greener future : the economic impact of decarbonizing goods vehicles in Europe. 2018.
  2. Chevron. Aviation fuels: technical review. 2007.
  3. Press releases -Rolls-Royce to test 100% sustainable aviation fuel in next generation engine demonstrator -Rolls-Royce. https://www.rolls-royce.com/ media/press-releases/2020/12-11-2020-rr-to-test-100-percent-sustainable-aviation- fuel-in-next-generation-engine-demonstrator.aspx (Accessed December 10, 2020).
  4. Baker H., Cornwell R., Koehler E., Patterson J. Review of low carbon technologies for heavy goods vehicles -annex 1. 2009.

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Authors
Gray, N., McDonagh, S., O'Shea, R., Smyth, B., & Murphy, J. D.
Affiliations
  • University College Cork (IE)
  • Queen's University Belfast (GB)
Corresponding author
Murphy, Jerry D
Venue
Advances in Applied Energy
Publisher
Elsevier BV
Published
2021-02
Volume
1
Pages
100008
ISSN
2666-7924 (ISSN-L)
OpenAlex
W3122164608
Cited by
499
References
103
Citations by year
2026: 82 · 2025: 123 · 2024: 96 · 2023: 88 · 2022: 81 · 2021: 29
FWCI
23.78
Type
journal article
Language
en
Open access
Locations
  • Advances in Applied Energy (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Research Portal (Queen's University Belfast) (submittedVersion, cc-by)
Funders
Science Foundation Ireland
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › Maritime Transport Emissions and Efficiency
  • Physical Sciences › Environmental Science › Global and Planetary Change › Advanced Aircraft Design and Technologies
  • Physical Sciences › Energy › Energy Engineering and Power Technology › Hybrid Renewable Energy Systems
Keywords
transport decarbonization, low-carbon fuels, carriage of goods by sea, aviation, haulage, biofuels, hydrogen, electrofuels, power-to-liquids, methanol, ammonia, biomethane, battery electric vehicles, energy density, life cycle greenhouse gas emissions, land use, fuel infrastructure, policy incentives

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