{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T20:01:49Z","timestamp":1782417709488,"version":"3.54.5"},"reference-count":14,"publisher":"STEF92 Technology","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,12,15]]},"abstract":"<jats:p>Drop-in sustainable aviation fuels (SAFs) are critical for reducing the aviation sector's reliance on fossil fuels while utilizing existing infrastructure. This review paper explores various approaches to producing drop-in SAFs, focusing on their technical pathways, compatibility with current engines, and environmental performance. Key technologies include thermochemical processes like Fischer-Tropsch synthesis, hydroprocessed esters and fatty acids (HEFA), and alcohol-to-jet (ATJ), as well as emerging biological and electrochemical conversion methods. These pathways are assessed based on feedstock flexibility, fuel properties, and the ability to meet aviation fuel standards (ASTM D1655). The paper also evaluates the economic and policy challenges hindering large-scale SAF production, including feedstock availability, production costs, and regulatory incentives. Advances in catalyst design, process optimization, and carbon capture integration are highlighted as essential innovations for scaling SAF production. By examining the potential and limitations of each approach, the review aims to guide future research and policy development in sustainable aviation fuel technologies.<\/jats:p>","DOI":"10.5593\/sgem2024v\/3.2\/s06.44","type":"proceedings-article","created":{"date-parts":[[2025,3,24]],"date-time":"2025-03-24T15:49:58Z","timestamp":1742831398000},"page":"391-396","source":"Crossref","is-referenced-by-count":2,"title":["ADVANCES IN DROP-IN SUSTAINABLE AVIATION FUELS (SAF): PATHWAYS, CHALLENGES, AND FUTURE DIRECTIONS"],"prefix":"10.5593","volume":"24","author":[{"given":"Odi","family":"Alrebei","sequence":"first","affiliation":[{"name":"Qatar Environment and Energy Research Institute-Hanad Bin Khalifa University","place":["Qatar"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3602","reference":[{"key":"ref=1","doi-asserted-by":"crossref","unstructured":"[1]Lee D. S., Fahey D. W., Skowron A., et al., The contribution of global aviation toanthropogenic climate forcing for 2000 to 2018, Atmospheric Environment, UK, 2021,pp. 117834.","DOI":"10.1016\/j.atmosenv.2020.117834"},{"key":"ref=2","unstructured":"[2]International Civil Aviation Organization (ICAO), Environmental Protection:Aviation Emissions, ICAO, Canada, 2022."},{"key":"ref=3","unstructured":"[3]Schafer A. W., Barrett S. R. H., Doyme K., et al., Technological, economic andenvironmental prospects of all-electric aircraft, Nature Energy, UK, 2016, pp. 16063."},{"key":"ref=4","unstructured":"[4]Hileman J. I., Stratton R. W., Alternative jet fuels, Environmental Science &Technology, USA, 2014, pp. 14043-14049."},{"key":"ref=5","unstructured":"[5]International Civil Aviation Organization (ICAO), CORSIA: The Carbon Offsettingand Reduction Scheme for International Aviation, ICAO, Canada, 2019."},{"key":"ref=6","unstructured":"[6]Zhang X., Myhre G., Kramer L. J., Aviation fuel and climate mitigation pathways:Long-term scenarios, Nature Sustainability, UK, 2022, pp. 125-133."},{"key":"ref=7","unstructured":"[7]ASTM International, ASTM D1655 - Standard Specification for Aviation TurbineFuels, ASTM, USA, 2020."},{"key":"ref=8","doi-asserted-by":"crossref","unstructured":"[8]De Jong S., Antonissen K., Hoefnagels R., et al., Life-cycle analysis of greenhousegas emissions from renewable jet fuel production, Biotechnology for Biofuels,Netherlands, 2017, pp. 64.","DOI":"10.1186\/s13068-017-0739-7"},{"key":"ref=9","unstructured":"[9]Lobo P., Hagen D. E., Whitefield P. D., Comparison of PM emissions from acommercial jet engine burning conventional, biomass, and Fischer-Tropsch fuels,Environmental Science & Technology, USA, 2015, pp. 4087-4095."},{"key":"ref=10","unstructured":"[10]Liu X., Zhang Y., Wang J., Chen P., Advances in biofuel production technologiesfor aviation applications, Renewable Energy, USA, 2022, pp. 203-216."},{"key":"ref=11","unstructured":"[11]Yan Q., Wang J., Lin H., Hydroprocessed renewable jet fuels: Production pathwaysand catalytic challenges, Catalysis Today, China, 2022, pp. 65-79."},{"key":"ref=12","unstructured":"[12]Cames M., Graichen J., Siemons A., Aviation biofuels: Technology roadmap andpolicy recommendations, Transport Research Part D: Transport and Environment,Germany, 2021, pp. 103088."},{"key":"ref=13","unstructured":"[13]Dhar A., Kumar S., Bose P. K., Electrochemical pathways for sustainable jet fuelproduction: Advances and prospects, Energy & Environmental Science, India, 2022, pp.1043-1057."},{"key":"ref=14","unstructured":"[14]Arora P., Deshmukh A. G., Catalyst developments in hydroprocessing for renewableaviation fuel production, Fuel Processing Technology, India, 2023, pp. 107170."}],"event":{"name":"24th SGEM International Multidisciplinary Scientific GeoConference 2024","theme":"SGEM Vienna GREEN Green Science for Green Life","location":"Vienna, Austria","acronym":"SGEM2024","number":"24","sponsor":["SGEM WORLD SCIENCE (SWS) Scholarly Society, Austria"],"start":{"date-parts":[[2024,11,27]]},"end":{"date-parts":[[2024,11,30]]}},"container-title":["SGEM International Multidisciplinary Scientific GeoConference\ufffd EXPO Proceedings","24th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2024, Water Resources. Forest, Marine and Ocean Ecosystems, Vol 24, Issue 3.2"],"original-title":[],"deposited":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T19:29:09Z","timestamp":1782415749000},"score":1,"resource":{"primary":{"URL":"https:\/\/epslibrary.at\/items\/8bbf0035-5014-4b7d-ab0b-71580e1705b8\/microbial-platforms-for-sustainable-aviation-fuel-production-metabolic-pathways-engineerin"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,12,15]]},"references-count":14,"URL":"https:\/\/doi.org\/10.5593\/sgem2024v\/3.2\/s06.44","relation":{},"ISSN":["1314-2704"],"issn-type":[{"value":"1314-2704","type":"print"}],"subject":[],"published":{"date-parts":[[2024,12,15]]}}}