Encontro de Energia no Meio Rural
Agrener

Abstract

FERNANDES, Marcelo Côrtes, SANCHEZ, Caio Glauco and ANGULO, Mario Barriga. Custos da gaseificação de gramínea para eletrificação rural. In Proceedings of the 3. Encontro de Energia no Meio Rural, 2000, Campinas (SP, Brazil) [online]. 2003 [cited 25 April 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022000000200021&lng=en&nrm=iso> .

Biomass gasification is an sustainable option for energy supply, which presents low pollutants emission rate and allows - through the global cycle of growing and consumption of feedstock (vegetables), a balance between consumption and production of carbonic gas, preventing an increase of the carbonic gas levels in the atmosphere. Fluidized bed gasification is a means to increase the energetic use of biomass. A gasifier was built with internal diameter of 400mm and total height of 4600mm . The equipment was tested for gasification of elephant-grass (pennisetum purpureum) at a 100 kg/h rate. It was evaluated an adequate diesel-electric-generator to work at hybrid regime, using 70% biomass gas and 30% diesel. With the equipment's construction costs, could be made a first economic feasibility assessment on the pilot-plant to produce electricity by grass gasification (elephant-grass) at rural communities. The annual cost of the investment was estimated. The cost of electricity was calculated as a function of the capital cost and the diesel price. The methods and equations for economic assessment are presented. This study found values between 0,16 and 0,23 R$/kWh for the produced electricity, what points towards the feasibility of this project.

Keywords : Biomassa; gaseificação; gaseificadores; eletrificação rural; viabilidade econômica; engenharia econômica.