The life‐cycle environmental impact assessment and cost of the CO₂ avoided (CCA) of a petroleum coke oxy‐combustion electric power generation technology operated with and without carbon capture and sequestration (CCS) are discussed. In an extension of our work on the design and economics presented in Part I, the environmental assessment was carried out for three candidate petroleum coke oxy‐combustion designs: petcoke oxy‐combustion operated without carbon capture and sequestration (CCS); petcoke oxy‐combustion operated with CCS; and petcoke oxy‐combustion with CO₂ purification by distillation and CCS. The environmental life‐cycle assessment of the designs was computed using both TRACI 2.1 midpoint and ReCiPe 2016 midpoint and endpoint methods. Using a levelized cost of electricity, the CCA was also employed as a performance metric for each of the designs. The results showed a life‐cycle GWP of 1089 kgCO₂eq/MWh, 17.32 kgCO₂eq/MWh, and 75.65 kgCO₂eq/MWh for the petcoke oxy‐combustion design operated without CCS, petcoke oxy‐combustion design operated with CCS, and petcoke oxy‐combustion with CO₂ purification by distillation and CCS, respectively. It was also found that acidification potential and particulate matter emissions were higher for the petcoke oxy‐combustion design operated without CCS due to the venting of SO₂ to the atmosphere. With a levelized cost of electricity between $90.94/MWh and $102.8/MWh, the CCA of the CCS‐enabled designs were between $10.43/tCO₂eq and $24.35/tCO₂eq, which is competitive with most other carbon capture options for large‐scale fossil‐based power plants. When the cost parameters were varied at the worst‐case scenario, the highest CCA observed was $115.9/tCO₂eq.

中文翻译：

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具有碳捕获和封存的高级石油焦氧燃烧发电：第二部分：环境评估和避免的CO2成本

讨论了使用和不使用碳捕集与封存（CCS）的石油焦氧燃烧发电技术的生命周期环境影响评估和避免的CO ₂成本。在第一部分中我们对设计和经济学的工作的扩展中，对三种候选石油焦氧燃烧设计进行了环境评估：无碳捕集和封存（CCS）的石油焦氧燃烧；用CCS进行的石油焦氧燃烧; 和石油焦与CO ₂的燃烧通过蒸馏和CCS纯化。使用TRACI 2.1中点和ReCiPe 2016中点和终点方法计算了设计的环境生命周期评估。使用均等的电力成本，CCA还被用作每个设计的性能指标。结果表明，在没有CCS的情况下运行的石油焦氧燃烧设计，在CCS的情况下运行的焦炭氧燃烧设计的生命周期GWP分别为1089 kgCO ₂ eq / MWh，17.32 kgCO ₂ eq / MWh和75.65 kgCO ₂ eq / MWh。和石油焦与CO ₂的燃烧分别通过蒸馏和CCS进行纯化。还发现，由于将SO ₂排放到大气中，在没有CCS的情况下运行的焦炭氧燃烧设计的酸化潜力和颗粒物排放更高。由于平均电成本在$ 90.94 / MWh和$ 102.8 / MWh之间，支持CCS的设计的CCA在$ 10.43 / tCO ₂当量和$ 24.35 / tCO ₂当量之间，与大多数其他大型碳捕集方案相比具有竞争力化石发电厂。当在最坏的情况下改变成本参数时，观察到的最高CCA为$ 115.9 / tCO ₂当量。