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Chenyue Zhang, Rongzhan Fu, Lixia Kang, Yingqun Ma, Daidi Fan, Qiang Fei
Biogas generated from food waste through anaerobic digestion is typically utilized for heat and electricity. However, recent developments in synthetic biology have enabled the conversion of carbon dioxide (CO2) and methane (CH4) in biogas into desired products by microorganisms. This study introduced a novel bioroute for the production of sustainable aviation fuel (SAF) using food waste in a carbo ...
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M.J. Watson, P.G. Machado, A.V. da Silva, Y. Saltar, C.O. Ribeiro, C.A.O. Nascimento, A.W. Dowling
This critical review comprehensively assesses the current landscape of sustainable aviation fuel (SAF) technologies, their associated costs, emissions profiles, policy implications, and market dynamics. This review highlights several key findings regarding bio-jet fuels as a low-carbon emission alternative to traditional jet fuel. First, the hydroprocessed esters and fatty acids (HEFA) technology ...
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2 downloads

David Chiaramonti, Lorenzo Testa
As Europe faces the dual challenge of decarbonizing its energy sector while ensuring energy security, REPowerEU reinforces the ambitious targets outlined in the Green Deal, complementing the “Fit for 55” package. This work analyses sustainable biomethane production in Europe, with a specific focus on Italy, and its conversion into sustainable fuels. Under the light of existing policy targets and r ...
Biogas; Biomass; Biofuels; Biomethane; Aviation; Maritime; Fischer-Tropsch; Methanol; Anaerobic digestion; Reforming; Syngas; ATJ; Fermentation; Ethanol; Process modelling; Renewable fuels; Sustainability; Energy policy
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Bianca Barros Marangon, Jackeline de Siqueira Castro, Paula Peixoto Assemany, Nádia Almeida Machado, Maria Lúcia Calijuri
The present paper compared, through life cycle assessment (LCA), the production of aviation biofuel from two hydrothermal routes of microalgae cultivated in wastewater. Hydrothermal liquefaction (HTL) and gasification followed by Fischer-Tropsch synthesis (G + FT) were compared. Both routes included biomass production, hydrotreatment for biofuel upgrading, and product fractionation. Secondary data ...
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Alberto Almena, Regina Siu, Katie Chong, Patricia Thornley, Mirjam Röder
Sustainable aviation fuels (SAFs) represent the short-term solution to reduce fossil carbon emissions from aviation.
Decarbonisation; Aviation; Sustainable Aviation Fuels; CCS; Lifecycle assessment; Net-negative emissions
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Brooke E. Rogachuk, Jude A. Okolie
The aviation industry is a major source of greenhouse gas emissions, making it critical to transition from traditional fossil jet fuels to eco-friendly sustainable aviation fuels (SAF). This change is essential to achieve the goal of net-zero emissions by 2030. Moreover, Waste tires presents a significant environmental challenge due to their durability and difficulty of disposal. Their toxic and f ...
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Qiang Cui, Zike Jia, Yujie Liu, Yu Wang, Ye Li
Since 2006, the rapid development of China’s aviation industry has been accompanied by a significant increase in one of its emissions, namely, PM2.5, which poses a substantial threat to human health. However, little data is describing the PM2.5 concentration caused by aircraft activities. This study addresses this gap by initially computing the monthly PM2.5 emissions of the landing-take-off (LTO) ...
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Dimitrios-Sotirios Kourkoumpas, Angeliki Sagani, Angelica Hull, Andrew Hull, Sotirios Karellas, Panagiotis Grammelis
This paper aims to carry out an integrated Life Cycle Assessment to evaluate the environmental performance of retrofitting an existing first-generation ethanol plant for sustainable aviation fuel production. Two scenarios are defined, considering: (i) the incorporation of an alcohol-to-jet conversion pathway into a current bioethanol plant in Spain to produce synthetic paraffinic kerosene with aro ...
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Ivo Abrantes, Ana F. Ferreira, Leandro B. Magalhães, Mário Costa, André Silva
The discussion about the environmental impact caused by aviation has gained greater prominence due to the increased demand for this sector and, consequently, the increase in the number of flights. Environmental concerns have stimulated the development of novel approaches to reduce pollutants and CO2 emissions. This study aims to assess the impact of disruptive concepts on commercial aircraft by re ...
Aircraft; Aviation; Scenarios; COz emissions
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Angel Eduardo García-Hernández, Juan Gabriel Segovia-Hernández, Eduardo Sánchez-Ramírez, Gabriel Contreras Zarazúa, Ivan Fernando Hernandez Araujo, Juan José Quiroz-Ramírez
Recent studies have provided a critical evaluation of the production of sustainable aviation fuels (SAFs) from biobutanol derived from biomass, underscoring their essential role in diminishing carbon emissions in the aviation industry. These studies highlight the significance of SAFs, particularly for long-haul flights, where they offer a viable solution for decarbonization and environmental susta ...
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Matthias Braun, Wolfgang Grimme, Katrin Oesingmann
Supporting the pathway to net zero carbon emissions in the aviation industry, sustainable aviation fuels (SAF) will contribute to a large extent to reduce net CO2 emissions in the next decades to deliver on climate targets. For this reason, the large-scale uptake of SAFs in aviation is on top of the agenda of regulatory policy. However, challenges remain for building the respective infrastructure ...
Sustainable aviation fuels; SAF pricing; Regulation policy; SAF production pathways; Environmental impacts
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Katrin Oesingmann, Wolfgang Grimme, Janina Scheelhaase
Aviation contributes to anthropogenic climate change by emitting both carbon dioxide (CO2) and non-CO2 emissions through the combustion of fossil fuels. One approach to reduce the climate impact of aviation is the use of hydrogen as an alternative fuel. Two distinct technological options are presently under consideration for the implementation of hydrogen in aviation: hydrogen fuel cell architectu ...
Aviation; Hydrogen demand; Sustainable aviation fuels; COz emissions; Emission reduction0
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Steven M. Rowland, Stefanie Van Wychen, Tao Dong, Roger Leach, and Lieve M. L. Laurens
The increasing demand for sustainable aviation fuel (SAF) creates a need for innovative biomass and lipid sources with compositions that are compatible with refineries. Algae-derived oils present an opportunity to supply a process-compatible lipid feedstock at yields higher than those of conventional oilseed crops. With few documented reports on chemical composition, the process readiness remains ...
Biomass,Extraction,Lipids,Pretreatment,Quality management
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Mihrimah Ozkan, Anvaya B. Narappa, Thrayesh Namboodiri, Yijian Chai, Matheshwaran Babu, Joan S.E. Jennings, Yingfan Gao, Sameeha Tasneem, Jason Lam, Kamal R. Talluri, Ruoxu Shang, Cengiz S. Ozkan, Jordyn M. Watkins
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Igor Davydenko, Hans Hilbers
To reduce aviation’s climatic impact, there are international, regional and national policies in place and under development. The most firm policy measure to reduce net CO2 emissions from aviation is ReFuelEU Aviation, requiring 70% of fuel tanked in the EU to be net CO2-free in 2050. Considering the technological options available, expected improvements in airline operational efficiency and aircr ...
aviation decarbonization; aviation CO2 emissions; decarbonization policy analysis; sustainable aviation fuels; aviation system efficiency; travel demand analysis
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Kiana Sanajou, Oxana Tchepe
The objective of this work is to develop a new modelling tool to quantify non-CO2 emissions from aircraft during the landing and take-off (LTO cycle) considering the following criteria: (i) utilising freely available activity data; (ii) using widely recommended emission factors; (iii) providing emissions with the spatial and temporal resolution required for local air quality assessment. Freely ava ...
aviation; emission modelling; non-CO2 aircraft emissions; LTO; flight tracking data
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Mello Fabiana Peixoto de, Macario Rosario
This study evaluates the authenticity, verifiability, and alignment of Voluntary Carbon Offset (VCO) claims made by eighteen European airlines, aligning them with proposed EU regulations specifically targeting greenwashing practices. Our analysis focuses on four key components within VCO programs: measurement, integrity, significance, and alignment. Our findings reveal that European airlines are e ...
aviation greewashing; carbon offset; carbon credits; EU regulation; ESG
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C. Mourouzidis, G. Singh, X. Sun, J. Huete, D. Nalianda, T. Nikolaidis, V. Sethi, A. Rolt, E. Goodger, P. Pilidis
This contribution focuses on the abatement with hydrogen of CO2 and non-CO2 emissions. It is agenda-setting in two respects. Firstly, it challenges the globally accepted hydrocarbon sustainable aviation fuel (SAF) pathway to sustainability and recommends that our industry accelerates along the hydrogen pathway to ‘green’ aviation. Secondly, it reports a philosophical and analytical investigation o ...
Hydrogen propulsion; hydrogen aircraft; gas turbines; CO2 emissions; non-CO2 emissions; green aviation
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Zongwei Zhang, Junqi Li, Zihan Wang, Haonan Liu, Keheng Wei
The sustainable aviation fuel (SAF) raw material planting process will inevitably cause carbon emissions from induced land use change (ILUC). However, limited by the regional specificity of energy plants, the ILUC emissions value of SAF is less considerable in the case of soil carbon sequestration during the raw material planting process. Therefore, this study used the CENTURY model to predict the ...
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ZHANG ZONGWEI, WANG ZIHAN, YANG ZE
The effects of composition of bio-jet fuels on freezing point,smoke point,distillation range,and flash point are investigated.Performance tests using petroleum-based jet fuel with different compositions are conducted in line with standard test specifications.The results show that alkylbenzenes reduce the freezing point,with the amount of reduction becoming greater with increasing alkylbenzene cont ...
sustainable aviation fuel; freezing point; smoke point; distillation range; flash point
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Yuxiu Chen, Chunxia Xu, Xiaojun Yang, Xiaojia He, Zongwei Zhang, Jian Yu, Liyan Quan, Shiqi Yang
Developing production technology pathways of sustainable aviation fuel (SAF) that align with China’s national conditions and aviation transportation needs is crucial for promoting the SAF industry and achieving China’s carbon peak and carbon neutrality goals. This article first projects the future SAF demand in China for the coming decades. Using SAF demand data as an input, this article employs t ...
sustainable aviation fuel; demand prediction; technology pathways; TOPSIS; segmented ensemble prediction
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Chenyu Gan, Qinglin Ma, Shengyu Bao, Xinming Wang, Tian Qiu, Shuiting Ding
Sustainable aviation fuels (SAFs) are considered an important solution for reducing carbon emissions. Safety is the most important prerequisite for a new fuel to be used in an aero-engine. As a special component in aero-engines, fuel is required to comply with both airworthiness and technical standards. These two types of standard work together to guide SAF development. In this paper, the SAF safe ...
sustainable aviation fuel; fuel assessment; aero-engine; certification standard; airworthiness
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Qiang Cui, Yilin Lei, Bin Chen
Aviationemissionaccountingisthekeytoestablishingmarketmeasurestocontrolaviationpollutant emissions. Based on the fuel percentage method (FPM), this paper applies the improved BFFM2-FOA-FPM (Boeing Fuel Flow Method 2–First Order Approximation FPM) to calculate the emissions of six pollutants (CO2, CO, HC, NOx, SO2, and PM2.5) between Chinese and foreign cities from 2014 to 2019, including CCD (clim ...
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Shuiting Ding, Chenyu Gan, Tian Qiu, Peng Liu, Qinglin Ma
The current certification process related to sustainable aviation fuel (SAF) has some problems to be solved, such as high testing costs, high testing fuel consumption, and the lack of safety criteria. In this paper, we proposed a system safety-based SAF safety assessment method and also offered a certification process for engine system safety. With the system safety of the engine as the top-level ...
System Safety; Airworthiness Certification; Sustainable Aviation Fuel; Safety Critical Parameter
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D.S. Lee, D.W. Fahey, A. Skowron, M.R. Allen, U. Burkhardt, Q. Chen, S.J. Doherty, S. Freeman, P.M. Forster, J. Fuglestvedt, A. Gettelman, R.R. De León, L.L. Lim, M.T. Lund, R.J. Millar, B. Owen, J.E. Penner, G. Pitari, M.J. Prather, R. Sausen, L.J. Wilcox
Global aviation operations contribute to anthropogenic climate change via a complex set of processes that lead to a net surface warming. Of importance are aviation emissions of carbon dioxide (CO2), nitrogen oxides (NOx), water vapor, soot and sulfate aerosols, and increased cloudiness due to contrail formation. Aviation grew strongly over the past decades (1960–2018) in terms of activity, with re ...
Aviation;Contrail cirrus;Climate;Radiative forcing;CO2;NOx
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Jackson Hwa Keen Lim, Yong Yang Gan, Hwai Chyuan Ong, Beng Fye Lau, Wei-Hsin Chen, Cheng Tung Chong, Tau Chuan Ling, Jiří Jaromír Klemeš
Aviation sector discharges approximately 2% of the global anthropogenic CO2, and the proportion is growing. The search for cost-effective and environmental-friendly bio-jet fuels derived from natural resources is gaining momentum. The microalgae cultivation conditions including temperature, pH, light intensity and nutrients have shown significant influence on the microalgae growth rate and chemica ...
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