Gasification of Lafia-Obi Coal using ANSYS Fluent as CAD Tool and Effect of Temperature and Pressure on Producer Gas Composition
Journal Title: International Journal of Engineering and Science Invention - Year 2018, Vol 7, Issue 5
Abstract
Gasification, the thermo-chemical conversion of fuels to combustible gases has assumed prominence because of its many advantages which include greenhouse gas sequestration, controllability among others. In this paper, Lafia-Obi bituminous coal in the Nigerian middle belt region was gasified in an updraft gasifier of 60kw capacity. A numerical modeling and simulation of the gasification chamber was carried out using ANSYSR17.2. The model was made using Solid Works CAD software and then imported to ANSYS FLUENT for simulation. Results obtained from the simulation showed producer gas composition of 16% CO, 15% H2, 2.7% CH4 and 18.6% CO2. This is in agreement with standard range of producer gas composition. Temperatures between 299.8k (26 o c) to 1187k (914o c) and pressure between 0.1 to 0.53Pa prevailed in the gasifier. As the temperature in the gasification chamber increased due to combustion reactions, mass fraction of product gas components such as carbon monoxide, carbon dioxide and hydrogen increased whereas that of methane reduced as the temperature increased. Also, the mass fraction of carbon monoxide, carbon dioxide and hydrogen reduced as the pressure is increased while that of methane increased as pressure within the gasifier is increased.
Authors and Affiliations
G. E. Ede, C. O. Folayan, G. Y. Pam, F. O. Anafi
Keywords
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