Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Exergy analysis of a hydrogen production plant with CO2 capture
Submission Author:
Gabriel Gomes Vargas , SP
Co-Authors:
Gabriel Gomes Vargas, Silvio de Oliveira Junior
Presenter: Gabriel Gomes Vargas
doi://10.26678/ABCM.COBEM2021.COB2021-0359
Abstract
The increase in greenhouse gas emissions, in addition to the global need to reduce the use of fossil fuels, has motivated the use of renewable fuels. Among them, sugar-cane biomass has proved to be an attractive alternative for producing clean fuels, such as hydrogen. However, this raw material has been widely used as fuel for boilers, thus losing the capacity to generate other by-products. For this reason, this article proposes an exergetic analysis of hydrogen production with CO2 capture. In this context, a chemical plant was designed and modelled. Its components are a circulated double bed gasifier, a synthesis gas treatment unit, a gas purification unit that uses selexol® to capture CO2, and a hydrogen recovery unit. The entire system was modelled and simulated in Aspen plus® v8.8. The irreversibility generated by the gasification unit has a relevant influence on the whole plant's exergy efficiency. Therefore, this internal irreversibility induces an overall exergy efficiency of approximately 41.68%. On the other hand, the chemical plant can generate an overall emission balance is -1.16 kg CO2/Nm³H2, which means remove an amount of about 15 t CO2/h.
Keywords
Biomass gasification, Decarbonization, Hydrogen Production, Exergy Analysis
