Syngas production from residual CO2 of the sugar-alcohol industry: A process simulation-based approach

Abstract

This work investigates a process for converting residual carbon dioxide (CO2), from the sugar-alcohol industry, into syngas, a gaseous fuel composed of carbon monoxide (CO) and hydrogen (H2). Syngas is used for the generation of electrical and thermal energy, as well as in the production of fuels and chemical products. The design and modeling were performed using the commercial process simulator UniSim® Design v500. The methodology employed allows for the definition of the process flow diagram, identification of optimal operating conditions, and evaluation of technical performance indicators. As a result, 0,75 metric tons of synthesis gas are obtained per ton of CO2 captured. The results demonstrate the technical feasibility of the proposed approach. The use of residual CO2 and renewable H2 as alternative feedstocks for synthesis gas production could drive the energy transition by reducing dependence on fossil fuels. This work is part of a broader project aimed at transforming biogenic CO2 generated in biomass combustion and fermentation processes into monocarbonate products, as a strategy to reduce carbon footprint and mitigate environmental impact in the chemical sector. Future research will include energy integration, cost analysis, and environmental impact assessment.