Dynamic analysis of sustainable biogas-combined-cycle plant: Time-varying demand and bioenergy with carbon capture and storage

Israel Bernardo S. Poblete, Ofélia de Queiroz F. Araujo and José Luiz de Medeiros

Renewable and Sustainable Energy Reviews, 2020, vol. 131, issue C

Abstract: Anaerobic-digestion degrades organic wastes, producing biogas to drive bioenergy turbines reducing fossil-fuel dependence. This work evaluates the biogas chain fromwaste-to-bioenergy, using models for dynamic simulation of biogas processing, bioenergy generation, and carbon capture. To do this, a dynamic anaerobic digestion model from the literature was expanded to implement dependence on time-varying external temperature and feedstock conditions and to introduce aspects of transient power plants with time-dependent electricity demand. Results demonstrate that external temperature and feedstock oscillations promote dynamic cycles in biogas production which have to be handled in a dynamic biogas-combined-cycle power plant with post-combustion carbon capture to match costs and transient electricity demand. Consequently, dynamic biogas-storage and bioenergy-storage were implemented to cope with demand/production fluctuations. Bioenergy-storage is accomplished via compressed-air-storage during electricity surplus periods to drive pre-heated turboexpanders during deficit periods. The biogas-combined-cycle, without carbon capture and bioenergy-storage, achieves 15 years of payback-time and 2.6 MMUSD net value. On the other hand, the sustainable configurations with/without bioenergy storage – both bioenergy with carbon-capture and storage systems achieving 1030 kg/h of negative emissions – reach feasibility for CO2 prices of 75 USD/tCO2 attaining net values of 2.02 and 0.18 MMUSD with 21 and 31 years of payback-time respectively.This implementation demonstrates that bioenergy storage with carbon negative emissions is feasible for small-scale biogas-fired combined-cycle plants.

Keywords: Anaerobic digestion; Biogas; Biogas combined-cycle; Dynamic analysis; Bioenergy; BECCS. Word count: 6825 words (excluding references; Captions; Title-page; Nomenclature; Abbreviations and acknowledgements) (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (4)

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DOI: 10.1016/j.rser.2020.109997

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