A critical review of the applicability of biodiesel and grass biomethane as biofuels to satisfy both biofuel targets and sustainability criteria

Thamsiriroj, T.; Murphy, Jerry D.

doi:10.1016/j.apenergy.2010.10.026

Cited by 40 publications

(19 citation statements)

References 31 publications

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“…22,23 Many methods of combined thermal, chemical and biological treatment of lignocellulosic biomass can produce ketones, short-chain fatty acid esters, acids, furans, methane and phenols. [24][25][26][27][28][29][30] With the development of various controlled processes for the conversion of renewable energy sources to liquid fuels for compression ignition engines, in contrast with current fossil diesel, at the point of production these future fuels will likely consist of a relatively small and discrete range of species, thereby enhancing the importance of the molecular structures of the compounds present to the overall fuel characteristics. This paper therefore presents a concise review of the effects of the molecular structures of fuels on the combustion characteristics and the exhaust emissions of NO x and Table 1.…”

Section: Introductionmentioning

confidence: 99%

An overview of the effects of fuel molecular structure on the combustion and emissions characteristics of compression ignition engines

Hellier

Talibi

Eveleigh

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Future fuels for compression ignition engines will be required both to reduce the anthropogenic carbon dioxide emissions from fossil sources and to contribute to the reductions in the exhaust levels of pollutants, such as nitrogen oxides and particulate matter. Via various processes of biological, chemical and physical conversion, feedstocks such as lignocellulosic biomass and photosynthetic micro-organisms will yield a wide variety of potential fuel molecules. Furthermore, modification of the production processes may allow the targeted manufacture of fuels of specific molecular structure. This paper therefore presents an overview of the effects of fuel molecular structure on the combustion and emissions characteristics of compression ignition engines, highlighting in particular the submolecular features common to a variety of potential fuels. An increase in the straight-chain length of the alkyl moiety reduces the duration of ignition delay, and the introduction of double bonds or branching to an alkyl moiety both increase ignition delay. The movement of a double bond towards the centre of an alkyl chain, or the addition of oxygen to a molecule, can both increase and decrease the duration of ignition delay dependent on the overall fuel structure. Nitrogen oxide emissions are primarily influenced by the duration of fuel ignition delay, but in the case of hydrogen and methane pilot-ignited premixed combustion arise only at flame temperatures sufficiently high for thermal production. An increase in aromatic ring number and physical properties such as the fuel boiling point increase particulate matter emissions at constant combustion phasing.

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Section: Introductionmentioning

confidence: 99%

An overview of the effects of fuel molecular structure on the combustion and emissions characteristics of compression ignition engines

Hellier

Talibi

Eveleigh

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…The shipping industry has limited experience of biofuels so far, and most biofuel LCA studies have been directed toward land based transportation (Esteban et al, 2011;Fazio and Monti, 2011;Lechón et al, 2009;Freire, 2010, 2011;Thamsiriroj and Murphy, 2011;Reijnders and Huijbregts, 2008;Koponen et al, 2013). However, there are some aspects in road based transport that differs to that of shipping.…”

Section: Existing Lca Literature and Datamentioning

confidence: 99%

Attributional life cycle assessment of biofuels for shipping: Addressing alternative geographical locations and cultivation systems

Kesieme

Pazouki

Murphy

et al. 2019

Journal of Environmental Management

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The purpose of this study is to evaluate a life cycle assessment of straight vegetable oil (SVO) and biodiesel addressing alternative upstream pathways. The pathways are SVO and biodiesel produced in the United Kingdom (UK) using European rapeseed and also, SVO and biodiesel produced in the UK using soybean grain and soybean oil imported from Argentina. Four environmental impact categories have been assessed using the SimaPro (ReCiPe life-cycle impact assessment) method: this includes global warming potential (GWP); acidification; eutrophication and particulate matter. Rapeseed based biofuel had the lowest emission impact in terms of GHG emissions. Significant greenhouse gas (GHG) emissions can result from land use change due to the expansion and cultivation of soybean in Argentina. When land use change is not considered, the soy based biofuel system has the lowest GHG impact with more than 70% GHG emission reduction. The GHG emission at cultivation stage far outweighs the impacts of the other life-cycle stages irrespective of the feedstock used for the biofuel production systems. The use of fertilizers and associated soil emissions are the main contributors. The environmental impacts of biofuel can be reduced by avoiding land use change, improving soil management practices and yield, and also optimizing transportation routes. Effective implementation of options for biofuels production were explored to improve sustainability in shipping. et al., 2018). The risk of indirect land use change has led some to

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“…[4] Although biodiesel can reduce the net greenhouse gas emissions introduced into the atmosphere as compared to fossil fuel, the level of net reduction depends on many factors, which include the feedstock type that the biodiesel was made from and the total emissions released for producing and collecting the feedstock and during the manufacturing of the biodiesel. [5][6][7] For example, palm-oil biodiesel can reduce the net greenhouse gas emissions by 56 % whereas the reduction for rapeseed biodiesel is only 38 %. [5] Higher net reduction in greenhouse gas emissions can be achieved if the biodiesel was produced from residues such as waste cooking oil.…”

Section: Introductionmentioning

confidence: 97%

The Impact of Changing the Compression Ratio on the Performance of an Engine fueled by Biodiesel Blends

2013

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Using waste‐cooking‐oil biodiesel as a renewable fuel for diesel engines can have several environmental benefits. However, the engine design parameters such as the compression ratio need to be optimized to achieve the best engine performance. The aim of this paper was to experimentally study the effect of changing the compression ratio on the engine performance and combustion characteristics of a compression–ignition engine fueled by different biodiesel/diesel fuel blends. It was found that the engine performance deteriorated when a high percentage of biodiesel was used in the fuel blend. However, the engine performance was significantly improved when the engine compression ratio was increased. The engine torque increased by 11.1 % when the engine was fueled by a biodiesel blend of 50 % at a compression ratio of 18 in comparison to the torque produced when the engine was fueled by the diesel fuel at a compression ratio of 14. Also, the engine brake thermal efficiency increased by 6 %. Both the ignition delay period and combustion duration decreased with the increase of engine compression ratio.

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A critical review of the applicability of biodiesel and grass biomethane as biofuels to satisfy both biofuel targets and sustainability criteria

Cited by 40 publications

References 31 publications

An overview of the effects of fuel molecular structure on the combustion and emissions characteristics of compression ignition engines

An overview of the effects of fuel molecular structure on the combustion and emissions characteristics of compression ignition engines

Attributional life cycle assessment of biofuels for shipping: Addressing alternative geographical locations and cultivation systems

The Impact of Changing the Compression Ratio on the Performance of an Engine fueled by Biodiesel Blends

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