Spectroscopic and Microscopic Study of Peroxyformic Pulping of Agave Waste

Hilda M. Hernández-Hernández, Jorge J. Chanona-Pérez, Alberto Vega, Pablo Ligero, Reynold R. Farrera-Rebollo, Jorge A. Mendoza-Pérez, Georgina Calderón-Domínguez, Norma Güemes Vera

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

14 Citas (Scopus)

Resumen

The peroxyformic process is based on the action of a carboxylic acid (mainly formic acid) and the corresponding peroxyacid. The influences of processing time (60-180 min), formic acid concentration (80-95%), temperature (60-80C), and hydrogen peroxide concentration (2-4%) on peroxyformic pulping of agave leaves were studied by surface response methodology using a face-centered factorial design. Empirical models were obtained for the prediction of yield, κ number (KN) and pulp viscosity as functions of the aforementioned variables. Mathematical optimization enabled us to select a set of operational variables that produced the best fractionation of the material with the following results: pulp yield (26.9%), KN (3.6), and pulp viscosity (777 mL/g). Furthermore, this work allowed the description and evaluation of changes to the agave fibers during the fractionation process using different microscopic and spectroscopic techniques, and provided a comprehensive and qualitative view of the phenomena occurring in the delignification of agave fibers. The use of confocal and scanning electron microscopy provided a detailed understanding of the microstructural changes to the lignin and cellulose in the fibers throughout the process, whereas Raman spectroscopy and X-ray diffraction analysis indicated that cellulose in the pulp after treatment was mainly of type I.

Idioma originalInglés
Páginas (desde-hasta)1084-1097
Número de páginas14
PublicaciónMicroscopy and Microanalysis
Volumen22
N.º5
DOI
EstadoPublicada - 1 oct. 2016

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