464724 Process Modeling of Fluidized Bed Biomass-CO2 Gasification Using Aspen Plus

Tuesday, November 15, 2016: 3:59 PM
Lombard (Hilton San Francisco Union Square)
Narendra Sadhwani1, Sushil Adhikari2 and Mario Richard Eden1, (1)Department of Chemical Engineering, Auburn University, Auburn, AL, (2)Department of Biosystems Engineering, Auburn University, Auburn, AL

Biomass can be converted to biofuels using various pathways which are broadly classified as biochemical or thermochemical. Gasification is a common thermochemical process that converts biomass to a gaseous product (syngas) which can be used for power generation, chemical production and as a fuel. The use of air, steam and oxygen as oxidizing agents in this process has been widely studied and reported. Improved CO concentrations have been observed when CO2 is added as a co-reactive agent in the gasification of biomass.

In this work, a comprehensive model simulating the biomass gasification process using CO2 in a fluidized-bed gasifier is developed using ASPEN Plus. The model utilizes additional reactors and mechanisms simulating various steps in the gasification process to predict the effect of operating parameters such as temperature and CO2 flowrate on biomass conversion and syngas composition. A sensitivity analysis of product gas composition and a comprehensive sustainability assessment is conducted to evaluate the economic, environmental, and social performance of the biomass-CO2 gasification process.

The results from this model are compared to published gasification experimental data obtained on a bench scale fluidized bed gasifier.

Extended Abstract: File Not Uploaded
See more of this Session: Thermochemical Conversion of Biomass II
See more of this Group/Topical: 2016 International Congress on Energy