A co-gasification strategy of residual municipal solid waste and biomass for electricity generation optimization and carbon reduction

Yidan Huang, Jiajun Li and Jiuping Xu

Energy, 2025, vol. 335, issue C

Abstract: Upon waste classification, large volumes of heterogeneous residual municipal solid waste (rMSW) present challenges for the low-carbon management of waste-to-energy. While co-gasification is a more efficient strategy for waste-to-energy utilization than mono-gasification, the collection and transportation of substrates emit additional greenhouse gases, resulting in a net positive and high carbon footprint in energy production. This study proposes a bi-level multi-objective optimization model that presents a co-gasification strategy of biomass and rMSW involving the authority and gasification plants. In this model, the co-gasification strategy is determined by operators based on the power generation efficiency, while the government’s carbon reduction goal interferes with the plant’s operation. A practical case study is subsequently investigated to demonstrate the applicability of the methodology in co-gasification deployment and resource recovery improvement; analyses related to carbon policy application are conducted by adjusting associated parameters. It was identified that the carbon tax policy encourages a co-gasification strategy more than a rigid emission cap regulation. Pricing carbon emissions at 80 CNY/tonne could present the lowest carbon emissions intensity and ensure the operating profit of each gasification plant. Based on the observations made, a set of targeted recommendations encompassing policy, technical, and market aspects is proposed for stakeholders.

Keywords: Bi-level multi-objective optimization; Co-gasification; Carbon emission reduction; Residue municipal solid waste (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:335:y:2025:i:c:s0360544225038022

DOI: 10.1016/j.energy.2025.138160

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