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Dynamic analysis of sustainable biogas-combined-cycle plant: Time-varying demand and bioenergy with carbon capture and storage
Renewable and Sustainable Energy Reviews ( IF 15.9 ) Pub Date : 2020-06-30 , DOI: 10.1016/j.rser.2020.109997
Israel Bernardo S. Poblete , Ofélia de Queiroz F. Araujo , José Luiz de Medeiros

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.



中文翻译:

可持续沼气联合循环工厂的动态分析:随时间变化的需求和具有捕获和存储碳的生物能源

厌氧消化会降解有机废物,产生沼气来驱动生物能源涡轮机,从而减少对化石燃料的依赖。这项工作使用模型对沼气处理,生物能产生和碳捕获进行动态模拟,评估了从废物转化为生物能的沼气链。为此,扩展了文献中的动态厌氧消化模型,以实现对随时间变化的外部温度和给料条件的依赖性,并介绍具有时变电力需求的暂态发电厂的各个方面。结果表明,外部温度和原料的振荡会促进沼气生产中的动态循环,而动态沼气联合循环发电厂必须利用燃烧后的碳捕集来处理这种动态循环,以匹配成本和瞬态电力需求。所以,实施动态沼气存储和生物能源存储以应对需求/生产波动。生物能存储是通过在电力过剩期间通过压缩空气存储来实现的,以在电力短缺期间驱动预热的涡轮膨胀机。没有碳捕获和生物能存储的沼气联合循环,可实现15年的投资回收期,净值为2.6 MMUSD。另一方面,带有/不带有生物能源存储的可持续配置–碳捕获和存储系统的生物能源均实现1030 kg / h的负排放量–二氧化碳价格为75美元/吨二氧化碳,净值分别为2.02和0.18 MMUSD时,是可行的分别具有21年和31年的投资回收期。

更新日期:2020-06-30
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