Characterization of lignocellulosic components in exhausted sugar beet pulp waste by TG/FTIR analysis
- 45 Downloads
In this work, the thermal decomposition of exhausted sugar beet pulp (ESBP) at a heating rate of 10 °C min−1 and the resulting evolved gases were examined by thermogravimetric (TG) analysis coupled with Fourier transform infrared (FTIR) spectroscopy. The results obtained in the identification of biomass fiber components were compared with those of the Van Soest method. The TG curves obtained in the fast thermal pyrolysis of ESBP exhibited substantial mass loss peaks primarily associated with the decomposition of pectin, hemicellulose and cellulose at 233, 269 and 341 °C, respectively. Lignin, however, was more difficult to decompose since its mass loss occurred over a broad temperature range (200–800 °C). The FTIR spectra obtained at these temperatures were consistent with the formation of large amounts of gases such as CO2, CO, H2O and CH4 in addition to a mixture of organic products including aldehydes, ketones, organic acids, alkanes and phenols. Based on these results, the proposed approach allows lignocellulosic components in exhausted sugar beet pulp biomass to be efficiently screened. Also, the new approach is faster, operationally simpler and more economical than the Van Soest method.
KeywordsThermogravimetry–infrared spectroscopy Biomass Chemical wet extraction Pyrolysis Lignocellulosic
The authors are grateful to the University of Cadiz for award of a research grant to the main author. Thanks are also due to Dr. Carlos Alvarez for supplying the sugar pulp biomass and Dr. Luis I. Romero and Ildefonso Caro for their valuable help and access to the Dosi-fiber equipment.
- 12.Fundación Española para el Desarrollo de la Nutrición. http://www.fundacionfedna.org/subproductos_fibrosos_humedos/pulpa-de-remolacha (2018). Accessed 25 May 2018.
- 41.Oudghiri F, García-Morales JL, Allali N, Rodríguez-Barroso MR. Investigation on possible contamination of port sediments by means of ATR–FTIR spectroscopy and thermal analysis. Int J Environ Res. 2014;8(4):1093–104.Google Scholar