PRODUCTION OF CHARCOAL WITH PYROLYSIS PROCESS FOR THE TREATMENT OF LIABILITIES OF INDUSTRIAL LANDFILLS: ANALYSIS OF LIFE CYCLE, DEVELOPMENT OF CLEAN TECHNOLOGIES AND SUSTAINABILITY

Abstract

This work involved the application of a pyrolysis system (350 ⁰C) in the treatment of industrial landfill liabilities, located in the southern region of Brazil. The life cycle assessment (LCA) of a bench unit pyrolysis procedure was evaluated, considering the amount of waste treated as the functional unit for LCA. Aspects of the system's operating inventories referred to a 10 g waste network flow. Scenarios of impacts of liabilities were made with Normalization and Characterization using the Impact 2002+ method. This considered the use of the procedures of Pyrolysis and Catalytic Pyrolysis with kaolinite (50% w / w). The analysis of the network flow with the LCA showed 2.1% of the total impacts on the Single Score for the residues, with 48.9 and 49%, respectively, for the pyrolysis and catalytic pyrolysis procedures (generating 71% of coal in the first case and 66% in the second case, the remaining fraction being oily and gaseous). In another single score analysis scenario, if the energy required for the process is obtained from the pyrolysis itself or in conjunction with another sustainable energy source, 90.1% of the impacts would be from the environmental liability (waste), having only 1.64 % and 8.3% of the pyrolysis and catalytic pyrolysis methods, respectively. In terms of kg CO₂eq, it should be considered that approximately 40% reduction can be obtained for the environmental impact of the waste with treatment with catalytic pyrolysis, especially with coal becoming fuel.