INVESTIGADORES
AREA Maria Cristina
congresos y reuniones científicas
Título:
DESIGN OF AN INTEGRATED BIOREFINERY FOR BIO-ETHYLENE PRODUCTION FROM FOREST INDUSTRIAL WASTE
Autor/es:
CARDOZO, R.E.; FELISSIA, F.E.; AREA, M.C.; CLAUSER, N.; VALLEJOS M.E
Lugar:
Lisboa
Reunión:
Congreso; XXIV TECNICELPA 2021 | XI CIADICYP 2021; 2021
Institución organizadora:
Tecniclpa-Riadicyp
Resumen:
The global forest industry is focused on the development of technologies for waste reuse or valorization. The use of regional resources in biorefineries could be a strategy to improve the profitability and mitigate the environmental impact of the involved industrial sectors, adding a new value chain into the forest industry. Pine sawdust is an important lignocellulosic waste from the primary processing of wood industrialization in Argentina, which could be a promising raw material to produce second-generation ethanol (2G ethanol) and its many derivatives as bio-ethylene based products. Bio-ethylene production requires the sawdust fractionation into its main components, the application of effective purification processes, and its cost-effective conversion into monomers and platform molecules, the bas of bio-ethylene production. The process design and technical and economic evaluation, including a rigorous sensitivity assessment, are required for developing and consolidating the biorefinery schemes on an industrial scale. This study developed the mass and energy balance for bio-ethylene production. The proposed production process is composed by the following steps: i) soda-ethanol pretreatment to remove the lignin from the raw material; ii) simultaneous saccharification and fermentation (SSF) to convert the cellulose to glucose and then to ethanol; iii) ethanol recovery (at 95% of concentration); iv) ethanol dehydration to bio-ethylene and; v) bio-ethylene recovery through an ethylene tower and stripper. The operational conditions of steps i and ii were adopted fromprevious experimental studies developed by our research group; moreover, steps iii to v were adopted from updated bibliography. In the proposed process, 111 kg of bio-ethylene per ton of dry sawdust could be obtained (purityof 99,95%). Besides, 177 kg of CO2 from SSF are produced and could be used for ligninrecovery from the pretreatment spent liquor. Energy consumption is about 1.3 MWh/t of drysawdust, and the highest consumption is in pretreatment and ethanol recovery processes (>90% of total energy consumption). For the proposed process, it is necessary to develop integration alternatives (regarding raw material, processes, others) and a technical economic assessment, with a rigorous sensitivity analysis of economic and processes variables to determine the feasibility of the developed scheme and potential improvements that could be developed.