Diseño del proceso de gasificación de cascarilla de arroz para la producción de gas de síntesis de uso energético en motores de Combustión interna de ciclo OTTO

The objective of this theoretical work is to design the husk gasification process. of rice to obtain synthesis gas and the evaluation of its use in a combustion engine internal Otto cycle, with the intention of taking advantage of the chemical composition and potential energy from waste from the rice industry. A bibliographic review of the gasification technologies that are used in the current situation, as well as the oxidizing agents and the most appropriate operating conditions according to the composition of the biomass used and the product to be obtained. Subsequently The aforementioned factors and operating conditions were selected based on the nature of the biomass and the magnitude of power demanded; established for an engine single-cylinder in-line Lombardini LGA 340 with 8 kW maximum power, considered low scale. Following this, the mathematical analysis of the gasification process was carried out to obtain synthesis gas, which was modeled under the concept of Gibbs free energy minimization of the gases expected in gasification and the atomic mass balance between the inlet and the outlet of the gasifier. The resulting system of equations is solved with the computational tool ́Solver ́ of Excel, varying the temperature and the molar ratio between the steam and the biomass of feeding. These results were compared to each other to determine the best relationship of temperature and steam-biomass in the feed, which offers the highest fraction of gases usable in the product gas, whose composition is predominated by hydrogen and carbon monoxide. Finally, the thermodynamic behavior of the base case of synthesis gas rich in hydrogen and carbon monoxide in the ideal Otto cycle with standard air assumptions. Of the which, it is determined that the synthesis gas has a heating value of 8.646 MJ/Nm3 (Mega Joules per Normo cubic meter) and shows a behavior similar to the standard conditions of the engine operated with gasoline when the cylinder is filled with a volumetric ratio of 40% synthesis gas (obtained in this work) and 60% air.

• Fecha de publicación: 2023
• Institución: Universidad de América
• Repositorio: Lumieres
• Idioma: spa
• OAI Identifier: oai:repository.uamerica.edu.co:20.500.11839/9251
• Acceso en línea: https://hdl.handle.net/20.500.11839/9251
• Palabra clave: Agentes oxidantes/gasificantes; Ciclo otto; Gasificadores de lecho; Oxidizing/gasifying agents; Otto cycle; Bed gasifiers; Tesis y disertaciones académicas
• License: Atribución – No comercial – Compartir igual