A. Tejado
TECNALIA Research, Sustainable Materials for Construction, Department Member
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... María González, Álvaro Tejado, Cristina Peña, and Jalel Labidi*. Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa 1, 20018, Donostia-San Sebastián, Gipuzkoa, Spain. Ind. Eng. Chem. Res.... more
... María González, Álvaro Tejado, Cristina Peña, and Jalel Labidi*. Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa 1, 20018, Donostia-San Sebastián, Gipuzkoa, Spain. Ind. Eng. Chem. Res. ...
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Since the last 30 years lignin has been subjected to an intensive investigation due to its unique structure that makes it useful for many applications, including polymer synthesis, obtaining of value added chemicals or as an additive with... more
Since the last 30 years lignin has been subjected to an intensive investigation due to its unique structure that makes it useful for many applications, including polymer synthesis, obtaining of value added chemicals or as an additive with interesting properties. In this work a series of 4 black liquors from different origin, including kraft liquor from pine (pinus radiata), soda liquors from flax (linum usitatissimum), this one using anthraquinone as catalyst, and grapevine (Vitis vinifera) vineshoot, and another one from wild tamarind (leucaena leucocephala) extracted by the organosolv Alcell method, have been subjected to chemical treatments in order to isolate different types of lignin. Subsequently, these lignins have been characterized using Fourier transform infrared spectroscopy (FT IR) and H-1-NMR to analyse the chemical structure, gel permeation chromatography (GPC) for determining molecular weight (MW) and molecular weight distribution (MWD) and thermogravimetric analysis ...
In this work, published experimental result data of the pulping of tagasaste (Chamaecytisus proliferus L.F.) with soda and anthraquinone (AQ) have been used to develop a model using a neural network. The paper presents the development of... more
In this work, published experimental result data of the pulping of tagasaste (Chamaecytisus proliferus L.F.) with soda and anthraquinone (AQ) have been used to develop a model using a neural network. The paper presents the development of a model with a neural network to predict the effects that the operational variables of the pulping reactor (temperature, soda concentration, AQ concentration, time and liquid/solid ratio) have on the properties of the paper sheets of the obtained pulp (brightness, traction index, burst index and tear index). Using a factorial experimental design, the results obtained with the neural network model are compared with those obtained from a polynomial model. The neural network model shows a higher prediction precision that the polynomial model.
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ABSTRACT