Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/221981
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Reductant atmospheres during slow pyrolysis of cellulose: First approach to obtaining efficient char-based catalysts in one pot |
Autor: | Santos, Jose Luis; Centeno, Miguel Ángel CSIC ORCID; Odriozola, José Antonio CSIC ORCID | Palabras clave: | Chars Reductant atmosphere Hydrogen Slow pyrolysis Catalyst support |
Fecha de publicación: | 2020 | Editor: | Elsevier BV | Citación: | Journal of Analytical and Applied Pyrolysis (2020) | Resumen: | Char based metallic (Pd-Au-Ru-Pt/C) catalysts have drawn increasing research interest due to their versatility in biomass related industrial reactions. Recent studies dealing with the synthesis of char-based catalysts in one single step (one-pot) use reductant atmospheres for biomass pyrolysis. In this work, the influence of the use of a reductant N/H atmosphere on the physicochemical properties of the resulting chars was evaluated in comparison with the use of an inert N atmosphere. Specifically, the fundamental parameter of the pyrolysis process, the temperature, was evaluated in the 500−900 °C range. Produced chars were fully characterized by N isotherms, ultimate CHNS analysis, X-ray Diffraction, Raman spectroscopy, Diffuse Reflectance Infrared spectroscopy, X-ray Photoelectron spectroscopy, helium Temperature Programmed Decomposition and Isoelectric Point analysis. Slow pyrolysis under reductant atmosphere favours deoxygenation reaction against dehydrogenation ones, reduces the carbon yield and results in chars with a more hydrophobic and graphitic character, higher thermal stability and weak surface functionalization. The use of intermediates temperatures (700 °C) favours the obtaining of chars with suitable physicochemical properties and good surface functionalization, which will facilitate the anchoring of the active phase on the surface, improving the metallic dispersion of the resulting one pot catalyst. This leads us to affirm that the use of reducing atmospheres at intermediate temperatures, is superior to the use of inert atmospheres for this purpose. This analysis on the impact of the use of a reductant atmosphere during slow pyrolysis of microcrystalline cellulose opens a new working path for the optimization of char-based catalysts obtained in a single stage. | Versión del editor: | http://dx.doi.org/10.1016/j.jaap.2020.104821 | URI: | http://hdl.handle.net/10261/221981 | DOI: | 10.1016/j.jaap.2020.104821 | Identificadores: | doi: 10.1016/j.jaap.2020.104821 issn:: 0165-2370 |
Aparece en las colecciones: | (ICMS) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
REVISE~2.docx | 1,81 MB | Microsoft Word XML | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
15
checked on 24-abr-2024
WEB OF SCIENCETM
Citations
16
checked on 23-feb-2024
Page view(s)
82
checked on 27-abr-2024
Download(s)
75
checked on 27-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.