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Thermodynamic assessment and techno-economic analysis of a liquid indium-based chemical looping system for biomass gasification
Energy Conversion and Management ( IF 9.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.enconman.2020.113428 M M Sarafraz 1 , F C Christo 1
Energy Conversion and Management ( IF 9.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.enconman.2020.113428 M M Sarafraz 1 , F C Christo 1
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A detailed thermochemical analysis is carried out to assess the energetic performance of a proposed process based on liquid metal slurry in a chemical looping gasification process. The system is designed to produce synthetic gas and generate electricity from low-grade (waste) solid carbon black collected from a thermal plasma plant. Indium oxide-indium slurry mixture was used as an oxygen carrier. The thermodynamic models showed that oxygen availability in the fuel reactor is the determining parameter that controls the operating mode of the system. The molar ratio of liquid metal to feedstock (LMO/C) and the steam to feedstock (S/C) are identified the key factors that regulate the level of exergy partitioned in the gas products. Generating steam by heat-recovery from the vitiated air (exhausted from the air reactor), is a proof that the process is partially self-sustained – capable of generating electricity to drive the pumps and the air compressors in the process. At LMO/C = 0.1 and S/C = 1.5, the largest exergy is partitioned in the synthetic gas and a syngas quality (molar ratio of H2: CO) of ~1.55 is achieved. The highest syngas quality was achievable, however, at the cost of unreacted steam, which increased the exergy destruction of the plant. The peak performance of the system is achieved when the (fuel and air) reactors operated at near-isothermal conditions. At these conditions, the exergy destruction between reactors is minimised and the power production in the power block is maximised. Based on indicative available price indexes, a techno-economic analysis evaluated the economic viability and the levelised cost of energy for a different price for various scenarios. It showed that the proposed system offers a competitive LCOE against several existing energy and hydrogen production systems.
中文翻译：
一种用于生物质气化的液态铟基化学循环系统的热力学评估和技术经济分析
进行了详细的热化学分析，以评估在化学循环气化过程中基于液态金属浆料的拟议过程的能量性能。该系统旨在生产合成气并利用从热等离子体工厂收集的低品位（废弃）固体炭黑发电。氧化铟-铟浆料混合物用作氧载体。热力学模型表明，燃料反应器中的氧气可用性是控制系统运行模式的决定性参数。液态金属与原料的摩尔比 (LMO/C) 和蒸汽与原料的摩尔比 (S/C) 被确定为调节气体产品中分配的火用水平的关键因素。通过从（空气反应器排出的）已污染的空气中进行热回收来产生蒸汽，证明该过程是部分自给自足的——能够发电以驱动过程中的泵和空气压缩机。在 LMO/C = 0.1 和 S/C = 1.5 时，最大的火用分配在合成气中，合成气质量（H2:CO 的摩尔比）约为 1.55。然而，可以实现最高的合成气质量，代价是未反应的蒸汽增加了工厂的火用破坏。当（燃料和空气）反应堆在接近等温条件下运行时，系统的性能达到最佳。在这些条件下，反应堆之间的火用破坏最小化，并且功率块中的功率产生最大化。根据指示性可用价格指数，一项技术经济分析评估了不同情景下不同价格的经济可行性和能源平准化成本。结果表明，与现有的几种能源和制氢系统相比，拟议系统提供了具有竞争力的 LCOE。
更新日期：2020-12-01
中文翻译：
一种用于生物质气化的液态铟基化学循环系统的热力学评估和技术经济分析
进行了详细的热化学分析，以评估在化学循环气化过程中基于液态金属浆料的拟议过程的能量性能。该系统旨在生产合成气并利用从热等离子体工厂收集的低品位（废弃）固体炭黑发电。氧化铟-铟浆料混合物用作氧载体。热力学模型表明，燃料反应器中的氧气可用性是控制系统运行模式的决定性参数。液态金属与原料的摩尔比 (LMO/C) 和蒸汽与原料的摩尔比 (S/C) 被确定为调节气体产品中分配的火用水平的关键因素。通过从（空气反应器排出的）已污染的空气中进行热回收来产生蒸汽，证明该过程是部分自给自足的——能够发电以驱动过程中的泵和空气压缩机。在 LMO/C = 0.1 和 S/C = 1.5 时，最大的火用分配在合成气中，合成气质量（H2:CO 的摩尔比）约为 1.55。然而，可以实现最高的合成气质量，代价是未反应的蒸汽增加了工厂的火用破坏。当（燃料和空气）反应堆在接近等温条件下运行时，系统的性能达到最佳。在这些条件下，反应堆之间的火用破坏最小化，并且功率块中的功率产生最大化。根据指示性可用价格指数，一项技术经济分析评估了不同情景下不同价格的经济可行性和能源平准化成本。结果表明，与现有的几种能源和制氢系统相比，拟议系统提供了具有竞争力的 LCOE。
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