Conversión de residuos lignocelulósicos procedentes de la Macaúba ("Acrocomia aculeata") y Piñón ("Pinus Pinea") en productos de muy alto valor añadido
- Adriana Correa-Guimaraes
- Elma dos Santos Souza
- Viviane da Silva-Lacerda
- Guillermo Berruguete
- Luis M. Navas-Gracia
- Norlan Ruiz-Potosme
- Luís Fernando Sánchez-Sastre
- Iosody Silva-Castro
- Salvador Hernández-Navarro
- Sergio Y. Motoike
- Pablo Martín Ramos
- Eduardo Pérez-Lebeña
- Jesús Martín-Gil
- Ayuga Téllez, Francisco (coord.)
- Masaguer Rodríguez, Alberto (coord.)
- Mariscal Sancho, Ignacio (coord.)
- Villarroel Robinson, Morris (coord.)
- Ruiz-Altisent, Margarita (coord.)
- Riquelme Ballesteros, Fernando (coord.)
- Correa Hernando, Eva Cristina (coord.)
Publisher: Fundación General de la Universidad Politécnica de Madrid
ISBN: 84-695-9055-3, 978-84-695-9055-3
Year of publication: 2014
Pages: 1824-1830
Congress: Congreso Ibérico de Agroingeniería y Ciencias Hortícolas (7. 2013. Madrid)
Type: Conference paper
Abstract
In this study, lignocellulosic residues obtained from Macaúba Palm (Acrocomia aculeata) –i.e. pulp, peel, almond and endocarp- and from the shell of Stone Pine (Pinus pinea) nuts have been used for the production of second-generation liquid biofuels, primary and/or secondary bio-products with high added value (namely 5- hydroxymethylfurfural (5-HMF), furfural and activated carbon). So as to obtain biofuels, we have started from Macaw Palm and/or Stone Pine residues, chipped to portions smaller than 250 µm, and the solvolysis of the biomass has been conducted by means of ionic liquids (ILs) in a microwave oven at 130°C (two minutes at 900W). The selected ionic liquids have been eutectic mixtures of choline chloride and oxalic/citric acid. TiO2 has been used as a catalyst and a mixture of H2O and sulfolane/DMSO2 -in various proportions- has been the solvent of choice. 5-HMF/furfural extraction has been carried out in butyl acetate and quantitated by HPLC at 280 nm. The behavior of the various eutectic mixtures/solvents has been assessed in order to obtain the highest possible yield of 5-HMF and/or furfural. For bio-products obtaining (active carbon), both the carbonized and the non-carbonized forms of the pine nut shell and the endocarp from Macaw Palm have been used, with a size smaller than 250 microns. The samples have been impregnated and activated in phosphoric acid/zinc chloride 1M and thermally treated at 500°C for 1 hour. After stirring/sonication in HCl acid 1M, the final product (photocatalyst) is washed 5 times with deionized water and dried for 24 hours at room temperature. The obtained activated carbon has been subsequently assessed as a photochemical catalyst for water pollutants removal (rhodamine B and methyl orange) and hydrogen production under sunlight (artificial photosynthesis) and/or using artificial radiation (e.g. Xenon lamp) by adsorption isotherms tracking.