Paper details

Title:

Furnace-Kiln System for Methane Reduction in the Production of Charcoal for Steel Use

Author(s):

Carneiro, A.C.O., Donato, D.B., Demuner, I.F., Lana, A.Q., Siqueira, H.F.

Document(s):

Abstract:

Brazil is the world's largest producer and consumer of charcoal for steelmaking use, however, Brazilian production is still mostly done in rudimentary brick kilns with uncontrolled emission of polluting gases. These gases, besides promoting unhealthy working conditions, cause several environmental impacts. The objective of this research was to evaluate the efficiency of a furnace in the reduction of methane gas (CH4) during the wood carbonization period in a masonry circular kiln. Five carbonizations were performed, with predefined temperature ranges, using Eucalyptus sp. wood and the kiln-furnace system for sustainable charcoal production. To obtain the concentration of methane gas, measurements were taken with 1-hour intervals throughout the wood carbonization process using a gas analyzer Gasboard 9030 (Whan CUBIC Optoelectronics Co.). Measurements were taken in the gas transport duct and the furnace chimney, before and after the carbonization gases entered the combustion chamber, respectively. The burning of the gases led to an average reduction of 70% of methane during the exothermic phase of wood pyrolysis, corresponding to 57% of the total carbonization cycle time. The burning of the carbonization gases in the evaluated kiln-furnace system resulted in a total reduction of 244.65 kg of CO2 emissions equivalent (CO2e), obtained from 3.2 tons of dry mass of wood. It can be concluded that the use of a furnace coupled with the charcoal production kiln significantly reduces the emission of methane gas during the process, contributing to improving the local working condition, besides reducing the environmental impacts generated by the activity, contributing to the decarbonization goals.

Keywords:

biorefinery, energy, sustainability, CO_2e

Topic:

Biomass Conversion to Intermediate Bioenergy Carriers and Sustainable Biofuels

Subtopic:

Pyrolysis

Event:

31st European Biomass Conference and Exhibition

Session:

5BV.10.9

Pages:

973 - 975

ISBN:

978-88-89407-23-3

Paper DOI:

10.5071/31stEUBCE2023-5BV.10.9

Price:

FREE