Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Evaluation of dolomite as a catalyst in the IN-SITU catalytic pyrolysis of sugarcane bagasse
Submission Author:
Ana Helena Campos Pereira , SP , Brazil
Co-Authors:
Ana Helena Campos Pereira, Kayky da Silva Obnesorg , Bruna de Jesus Bueno Machado, Gretta Larisa Aurora Arce Ferrufino, Ivonete Ávila, Carlos Manuel Romero Luna, Nicole Musielak
Presenter: Ana Helena Campos Pereira
doi://10.26678/ABCM.COBEM2023.COB2023-1980
Abstract
Energy is synonymous with development, and the energy demand in the world has been increasing exponentially, as a way to fulfill this need, biomass can be an important ally. The biomass pyrolysis process has great potential to produce biofuels with high energy power. Biomass pyrolysis consists in the thermal decomposition of biomass, in an inert atmosphere, or one lacking oxygen, resulting in three products, namely: a liquid (bio-oil), a solid (biochar) and a gas (pyrolytic gas). However, the bio-oil obtained has certain undesirable characteristics such as a high water content, oxygenated compounds, low pH and a very variable chemical composition. All these characteristics end up making it difficult to use it as a biofuel. However, these problems can be solved with the use of a catalyst during the pyrolysis process, which is called catalytic pyrolysis. Catalytic pyrolysis aims to improve the quality of bio-oil through chemical reactions such as deoxygenation, dehydration and hydrogenation. Dolomite is a mineral with the chemical formula CaMg (CO3)2, one of the main carbonate minerals, composed of calcium carbonate (CaCO3) and magnesium carbonate (MgCO3). It is a material with potential to be a catalyst due to its properties, cost, in relation to the most used synthetic catalysts, in addition to being easily found in the environment, in limestone rocks. In Brazil, mainly in the north and southeast regions, the application of catalytic pyrolysis of sugarcane bagasse using dolomite as catalyst is relevant, due to the great availability of this biomass and this catalyst, since the largest deposit of dolomite is found in the north of Brazil, and the possibility of producing biofuels with advantageous characteristics at a good cost benefit, in addition to adding value to the bio-oil produced. In this work, the IN-SITU catalytic pyrolysis of sugarcane bagasse using dolomite as catalyst in a fixed bed reactor is studied. Thermal pyrolysis tests of sugarcane bagasse without catalyst were carried out under the same conditions to compare the results obtained. Preliminary results demonstrate that the use of dolomite as a catalyst has a significant effect on the quality and yield of the pyrolysis products, causing a reduction in the water amount, oxygen and acidity of the bio-oil, causing an increase in the calorific value of the bio-oil.
Keywords
renewable energy, Catalytic pyrolysis, lignocellulosic biomass, Sugarcane bagasse, Bio oil upgrading
