Environmental concerns are one of the top priorities of industrial sectors with hard-to-eliminate emissions, in Brazil, the use of fossil resources in power plants needs solutions to reach emission goals and post-combustion carbon capture, one of the most used strategies for CO abatement, is suitable for 78% of the stationary carbon sources. Two different scenarios were evaluated by techno-economic and environmental analysis, these scenarios were: (i) standalone retrofit, which refers to integrating one CCUS unit to the larger power plant in a complex; and (ii) strategically placed hubs of CO to address more and minor carbon sources. The results show that in terms of energy penalty is better to operate only under Standalone Scenario. However, there is a preference for working with CO hubs, based on 60% lower levelized costs of avoided emissions, and up to 88% lower emission factors, even with its larger Total Expenses (TOTEX). It was found that more than two times the level of emissions can be avoided using CO hubs in comparison to the Standalone Scenario. Moreover, the analysis referent to effects of the carbon market showed that the current system is far away from assist and even more to be a valuable incentive to decarbonization.

中文翻译：

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燃煤发电厂独立改造和二氧化碳中心碳捕获的技术经济和环境比较


环境问题是难以消除排放的工业部门的首要任务之一，在巴西，发电厂使用化石资源需要解决方案来实现排放目标和燃烧后碳捕获，这是最常用的策略之一CO 减排，适用于 78% 的固定碳源。通过技术经济和环境分析评估了两种不同的情景，这些情景是： (i) 独立改造，指将一个 CCUS 装置集成到综合体中较大的发电厂； (ii) 战略性地设置二氧化碳中心，以解决更多和次要的碳源问题。结果表明，在能量损失方面，仅在独立场景下运行更好。然而，尽管总费用 (TOTEX) 较大，但由于避免排放的平准化成本降低了 60%，排放系数降低了 88%，因此优先选择与 CO 中心合作。研究发现，与独立方案相比，使用二氧化碳中心可以避免两倍多的排放量。此外，对碳市场效应的分析表明，现行制度远不能起到辅助作用，更不能成为脱碳的有效激励措施。