{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T01:12:13Z","timestamp":1768785133640,"version":"3.49.0"},"reference-count":44,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,10]],"date-time":"2022-12-10T00:00:00Z","timestamp":1670630400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>In an era where sustainability is becoming the main driving force for research and development, supercritical fluids-based techniques are presented as a very efficient alternative technology to conventional extraction, purification, and recrystallization processes. Supercritical antisolvent (SAS) precipitation is a novel technique that can replace liquid antisolvent precipitation techniques. Additionally, through the optimization of precipitation operating conditions, morphology, particle size, and particle size distribution of nanoparticles can be controlled. As an antisolvent, supercritical carbon dioxide (scCO2) is far more sustainable than its conventional liquid counterparts; not only does it have a critical point (304 K and 73.8 bar) on its phase diagram that allows for the precipitation processes to be developed so close to room temperature, but also its recovery and, consequently, the precipitated solute purification stage is considerably simpler. This technique can be used efficiently for preparing nanocatalysts to be used in biodiesel production processes.<\/jats:p>","DOI":"10.3390\/en15249355","type":"journal-article","created":{"date-parts":[[2022,12,12]],"date-time":"2022-12-12T05:10:19Z","timestamp":1670821819000},"page":"9355","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["A Brief Review of the Supercritical Antisolvent (SAS) Technique for the Preparation of Nanocatalysts to Be Used in Biodiesel Production"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8602-7885","authenticated-orcid":false,"given":"Samuel","family":"Santos","sequence":"first","affiliation":[{"name":"CERENA\u2014Center for Natural Resources and Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2763-3655","authenticated-orcid":false,"given":"Jaime","family":"Puna","sequence":"additional","affiliation":[{"name":"CERENA\u2014Center for Natural Resources and Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal"},{"name":"Chemical Engineering Department, Instituto Superior de Engenharia de Lisboa, Lisbon Polytechnic, R. Conselheiro Em\u00eddio Navarro, 1, 1959-007 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2579-6669","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Gomes","sequence":"additional","affiliation":[{"name":"CERENA\u2014Center for Natural Resources and Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal"},{"name":"Chemical Engineering Department, Instituto Superior de Engenharia de Lisboa, Lisbon Polytechnic, R. Conselheiro Em\u00eddio Navarro, 1, 1959-007 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Su, W., Zhang, H., Xing, Y., Li, X., Wang, J., and Cai, C. (2021). A Bibliometric Analysis and Review of Supercritical Fluids for the Synthesis of Nanomaterials. Nanomaterials, 11.","DOI":"10.3390\/nano11020336"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1016\/j.energy.2014.07.044","article-title":"Industrial Applications of Supercritical Fluids: A Review","volume":"77","author":"Knez","year":"2014","journal-title":"Energy"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"107532","DOI":"10.1016\/j.cep.2019.107532","article-title":"Are Supercritical Fluids Solvents for the Future?","volume":"141","author":"Knez","year":"2019","journal-title":"Chem. Eng. Process. 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