The effect of magnesium chloride as an additive of hydrothermal carbonization (HTC) of lignocellulosic biomass (Pinus radiata sawdust) was studied. The HTC tests were carried out at fixed conditions of temperature and residence time of 220 °C and 1 h, respectively, and varying the dose of magnesium chloride in the range 0.0-1.0 g MgCl2/g biomass. The carbonized product (hydrochar) was tested in order to determine its calorific value (HHV) while using PARR 6100 calorimeter, mass yield by gravimetry, elemental analysis using a LECO TruSpec elemental analyzer, volatile matter content, and ash content were obtained by standardized procedures using suitable ovens for it. The results show that using a dose of 0.75 g MgCl2/g biomass results in an impact on the mass yield that was almost equal to change operating conditions from 220 to 270 °C and from 0.5 to 1 h, without additive. Likewise, the calorific value increases by 33% for this additive dose, resulting in an energy yield of 68%, thus generating a solid fuel of prominent characteristics.
Bibliographical noteFunding Information:
This research was funded by CONICYT FONDEF Idea project ID15I10580 and BMBF-CONICYT 150067. Projects FONDEF Idea ID15I10580, BMBF-CONICYT 150067, and CONICYT Beca Doctorado Nacional 2014 FOLIO 21140195.
Funding: This research was funded by CONICYT FONDEF Idea project ID15I10580 and BMBF-CONICYT 150067.
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
- Hydrothermal carbonization
- Lignocellulosic biomass
- Magnesium chloride
- Waste to energy