This work presents a novel plant configuration for power production from solid fuels with integrated CO₂ capture. Specifically, the Gas Switching Combustion (GSC) system is integrated with a Humid Air Turbine (HAT) power cycle and a slurry fed entrained flow (GE‐Texaco) gasifier or a dry fed (Shell) gasifier with a partial water quench. The primary novelty of the proposed GSC‐HAT plant is that the reduction and oxidation reactor stages of the GSC operation can be decoupled allowing for flexible operation, with the oxygen carrier serving as a chemical and thermal energy storage medium. This can allow the air separation unit, gasifier, gas clean‐up, CO₂ compressors and downstream CO₂ transport and storage network to be downsized for operation under steady state conditions, while the reactors and the power cycle operate flexibly to follow load. Such cost‐effective flexibility will be highly valued in future energy systems with high shares of variable renewable energy. The GSC‐HAT plant achieves 42.5% electrical efficiency with 95.0% CO₂ capture rate with the Shell gasifier, and 41.6% efficiency and 99.2% CO₂ capture with the GE gasifier. An exergy analysis performed for the GE gasifier case revealed that this plant reached 38.9% exergy efficiency, only 1.6%‐points below an inflexible GSC‐IGCC benchmark configuration, while reaching around 5%‐points higher CO₂ capture rate. Near‐zero SO_x and NO_x emissions are achieved through pre‐combustion gas clean‐up and flameless fuel combustion. Overall, this flexible and efficient near‐zero emission power plant appears to be a promising alternative in a future carbon constrained world with increasing shares of variable renewables and more stringent pollutant (NO_x, SO_x) regulations.

中文翻译：

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将气体开关燃烧系统集成到湿式空气涡轮机循环中，以利用固体燃料灵活发电，二氧化碳和其他污染物的排放几乎为零

这项工作提出了一种新型的工厂配置，该设备可利用集成式CO ₂捕集的固体燃料发电。具体而言，气体切换燃烧（GSC）系统与湿空气涡轮（HAT）功率循环以及带有部分水淬的浆式进料气流（GE-Texaco）气化炉或干式（Shell）气化炉集成在一起。拟议中的GSC-HAT工厂的主要新颖之处在于，GSC操作的还原和氧化反应器阶段可以解耦，从而实现灵活的操作，其中氧气载体可以用作化学和热能存储介质。这可以使空气分离单元，气化炉，气体净化，CO ₂压缩机和下游CO ₂运输和存储网络要缩小尺寸，以便在稳态条件下运行，同时反应堆和功率循环可以灵活地随负荷运行。这种具有成本效益的灵活性将在未来具有可变可再生能源份额较高的能源系统中得到高度重视。GSC‐HAT工厂使用壳牌气化炉实现了42.5％的电效率和95.0％的CO ₂捕集率，而GE气化炉实现了41.6％的效率和99.2％的CO ₂捕集。分析为GE气化器情况下执行的有效能揭示该植物达到38.9％的放射本能效率，只有1.6以下的硬性GSC-IGCC基准配置％-points，而达到约5％-points较高的CO ₂的捕获率。SO _x和NO _x接近零通过燃烧前气体净化和无焰燃料燃烧实现排放。总体而言，随着可变可再生能源份额的增加和更严格的污染物（NO _x，SO _x）法规的使用，在未来的碳排放受限的世界中，这种灵活高效的近零排放发电厂似乎是一个有前途的替代方案。