Document type
Conference papers
Document subtype
Abstract
Title
Supercritical Antisolvent Precipitation: considerations on the use of this technique to produce catalysts
Participants in the publication
Luís Nobre (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
António M.F. Palavra (Author)
INSTITUTO SUPERIOR TÉCNICO
Mário Calvete (Author)
FACULDADE DE CIÊNCIAS E TECNOLOGIA DA UNIVERSIDADE DE COIMBRA
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Beatriz Nobre (Author)
INSTITUTO SUPERIOR TÉCNICO
Summary
Sustainability is a major subject these days, and catalysis gave, and continuously give, a great contribution to this. But catalysis is only truly sustainable if the paths we take to do it are sustainable in their own. An important aspect is the way catalysts are produced. In general, the production of them involves several steps since their precipitation or other synthesis processes, hydrothermal transformations, filtrations and washing steps, crushing and griding, and calcination or activation methods. To meet the principles of green chemistry1 and the goals of Unite Nations to sustainable development2, paths that spend less resources and are likely to generate less waste should be followed. \nA possible road to follow in the catalysts production is the supercritical environment. There are today several processes that use supercritical fluids to generate micro and nanoparticles. One of them is supercritical antisolvent precipitation. This technique is capable of precipitate micro or nano particles of catalysts or precursors, accordingly the experimental conditions3. The work of the last few years producing catalysts with this eco-friendly technique is now analysed in retrospective, in order to assess the cost and impact that this production technique may have increased the benefits of the produced catalysts.\n1. Anastas, P. T. & Warner, J. C. Green Chemistry: Theory and Practice. (Oxford University Press, 1998).\n2. United Nations. Transforming our world: the 2030 Agenda for Sustainable Development. https://sdgs.un.org/2030agenda.\n3. Reverchon, E., de Marco, I. & Torino, E. Nanoparticles production by supercritical antisolvent precipitation: A general interpretation. The Journal of Supercritical Fluids 43, 126–138 (2007).
Date of Publication
2021-12-06
Institution
UNIVERSIDADE DE LISBOA
Event
6th CATSUS Workshop
Publication Identifiers
Address
Lisboa, Portugal
Organizers
CQE, Instituto Superior Técnico