Determinación del poder calorífico de la biomasa de tallos de quinoa y cáscara de piña con la combinación de nanopartículas de aluminio

Abstract

The objective of this work was to determine the calorific value of the biomasses of quinoa stems and pineapple peel. The behavior of agro-industrial wastes combined with NmAl (aluminum nanoparticles) was observed, and then briquettes with a high calorific value were produced. To prepare the raw material, the humidity of the biomasses was controlled by means of stoves; after reducing the humidity content to 5%, they were crushed and sieved with a mesh size of 250 micrometers, and the proximate analysis took into account the percentage of humidity and ash. In addition, an elemental chemical analysis (carbon) was recorded, as for NmAl these were analyzed in a scanning electron microscope (SEM) to take images and particle diameter, and infrared spectroscopy (FTIR) was used to obtain diffraction patterns. To determine the calorific value, individual tests were carried out for each biomass in the GDY - 1A Oxygen Bomb Calorimeter equipment and a subsequent analysis of the calorific value of the mixture of biomasses in different proportions 25:75; 50:50; 75:25 (percentages in weight), being the one with the highest result the combination of 50:50, this biomass had a calorific value of 46614. 7167 J/g, after this, NmAl was added and the behavior of the calorific value was examined, resulting in a decrease of the calorific value, then the 50:50 mixture was chosen to elaborate briquettes in a semi-industrial way. It is concluded that the individual calorific value of agro-industrial residues is lower than a combination of two biomasses in adequate proportions; on the other hand, NmAl does not benefit the calorific value of solid fuels, but rather decreases it. It is recommended to use a sieve with a suitable mesh size in the calorific value study, and to perform up to three repetitions of each test to corroborate the results