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Multi-Objective Target-Oriented Robust Optimization of Biomass Co-Firing Networks under Quality Uncertainty

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
ARTICLE IN PRESS (volume and issue assigned later), 1080364
DOI: http://dx.doi.org/10.13044/j.sdewes.d8.0364
Jayne San Juan , Charlle Charlle Sy
Industrial Engineering Department, De La Salle University, Manila, Philippines

Abstract

Reductions in coal use and greenhouse gas emissions may be achieved through implementing biomass co-firing in existing coal-fired power plants with minor retrofits. Furthermore, the biomass may be sourced sustainably from agricultural wastes. Under direct co-firing, biomass is directly used as secondary fuel, while indirect co-firing separately processes the biomass reducing risks for equipment damage from unconventional feedstock. Despite the increased costs, this approach generates a biochar by-product that may be applied directly to soil for permanent carbon sequestration. However, these systems face uncertainties in biomass quality that may increase costs and environmental impacts during actual operations. This work develops a multi-objective target-oriented robust optimization model to design biomass co-firing networks integrating uncertainty in biomass properties with investment and operations planning. A case study is solved to demonstrate model capabilities. Monte Carlo simulation shows that the robust optimal network is relatively insusceptible to uncertainties compared to the deterministic solution.

Keywords: Biomass co-firing, Biochar, Target-oriented robust optimization, Multi-objective optimization.

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