Determinación del poder calorífico de los residuos sólidos agroindustriales de cáscara de café y tallo de plátano combinados con nanocelulosa

Abstract

The objective of this study consisted of determining the calorific value of the solid agroindustrial residues of coffee husk and banana stalk, considering the importance of the biomass as an alternative energy source. The composition of the residues was analyzed by means of different analyses, where the humidity, percentage of ash, amount of carbon and nitrogen were determined. In addition, the behavior of the residues was observed with the nanocellulose that was synthesized and characterized by infrared spectroscopy analysis and analysis (SEM) to check the particle diameter. To determine the calorific value, the GDY - 1A Oxygen Bomb Calorimeter equipment was used, in which the calorific value of each biomass and the mixture of these in different proportions 25:75; 50:50; 75:25 was established, the formulation being with the highest calorific value 42117.86 J/g, with 25% banana stalk and 75% coffee peel. In order to increase the calorific value of the agroindustrial residues, nanocellulose was added in the proportions of 20%, 50% and 80%, the combination of nanocellulose was not efficient because with an optimal proportion the power can be increased and, therefore, the briquettes were made with the mixture with the highest calorific value. It is concluded that the individual calorific value of the coffee husk is higher than the combination with the banana stalk, but the addition of the banana stalk is necessary because it helps to the compaction and hardness of the briquettes, thus avoiding the formation of cracks. It is recommended to perform three repetitions of each test for a better analysis of the calorific value of biomasses, also a pre-treatment of the raw material should be carried out to avoid damage to the equipment.