Techno-Economical Analysis for a 3 MWth Gasification Plant Revamping: Use of Enriched Air and Steam as Gasifying Agent
2010
Campoy Naranjo, Manuel | Gómez Barea, Alberto | Fuentes Cano, Diego Javier | Nilsson, Susanna Louise | Claro, G. | Ollero de Castro, Pedro Antonio | Universidad de Sevilla. Departamento de Ingeniería Química y Ambiental
An assessment of the revamping of a 3 MWth atmosphericpressure bubbling fluidized bed biomass gasifier was made in order to study the technoeconomical viability of changing the gasifying agent from air to a mixture of enriched air based on membrane technology (up to 40% in volume oxygen) and lowpressure saturated steam. The expected changes in the gasification yields were obtained from extrapolating the yields of the noncondensable main gases (H2, CO, CO2 and CH4) measured in a 100 kWth pilot plant facility. The main variables for the economical sensitivity analysis included the initial investment for the new equipment, the operating hours per year and the plant capacity (biomass flowrate). Net present values of up to 180 k€ and internal rate of return of up to 20% could be achieved. The results show that this gasification concept seems to be an interesting and viable option for standalone direct airblown fluidized bed gasifiers.
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