WITHDRAWN: Integration of an O2 transport membrane and a biomass-fueled SCO2 cycle for liquid CO2/freshwater/power production: ANN-based optimization and techno-economic evaluation

Abstract

This research presents a sustainable approach leveraging biomass as a renewable energy source and separation technology to produce liquid carbon dioxide for the food industry, alongside power and freshwater. The proposed system comprises five key sections. The biomass gasification section produces pure oxygen as a gasification agent using an oxygen transport membrane. The power generation section employs supercritical carbon dioxide oxy-fuel, enabling simultaneous power generation and carbon dioxide separation and purification. The freshwater production department uses a Multi-Stage Flash unit for desalination, drawing heat from the power generation cycle. The oxygen production section, based on oxygen transport membrane technology, supplies oxygen for the power generation cycle. The liquefaction section, utilizing the Claude cycle, facilitates carbon dioxide storage and transportation. The proposed system underwent rigorous techno-economic analysis and was further explored through multi-objective optimization based on artificial intelligence, aiming to minimize liquid carbon dioxide production costs and maximize net power output. Under pre-optimized conditions, the system exhibited a net power of 850 kW and a carbon dioxide price of $0.6/kg. Optimization results revealed a 12-year payback period, with a minimum carbon dioxide price of $0.51/kg and a maximum net power of 1692 kW. Comparative analysis under minimum carbon dioxide price conditions showed a 15% decrease in liquid carbon dioxide price and an 89% decrease in net power compared to pre-optimized conditions. Conversely, comparing the system's maximum net power after optimization to pre-optimized conditions demonstrated a 17% increase in liquid carbon dioxide price and a remarkable 99% increase in net power, highlighting substantial economic benefits.