Browsing Articles publicats (Tecnologia dels Aliments) by Author "Ayastuy, José L."

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An insight into the reactions occurring during the chemical activation of bone char

Iriarte-Velasco, Unai; Ayastuy, José L.; Zudaire Villanueva, Lorena; Sierra, Irene (Elsevier B.V, 2014-09-01)

The valorisation of animal wastes by pyrolysis has shown to be of interest, due to the versatility of the main compound of char, hydroxyapatite (HAP), which can be used in catalysis, electrochemistry, and adsorption. The ...
Conversion of waste animal bones into porous hydroxyapatite by alkaline treatment: effect of the impregnation ratio and investigation of the activation mechanism

Iriarte-Velasco, Unai; Sierra, Irene; Zudaire Villanueva, Lorena; Ayastuy, José L. (Springer, 2015-08-06)

Microporous biochars, mainly composed by hydroxyapatite (HAp), were prepared from animal waste bones. In this study, a three-step procedure including pre-pyrolysis, chemical treatment with NaOH, KOH and K2CO3, and pyrolysis ...