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Hydrogen Utilization for Carbon Recycling Iron Making System

机译:氢气用于碳循环炼铁系统

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A new energy transformation concept based on carbon recycling, called the Active Carbon Recycling Energy System, ACRES, had been proposed for a zero carbon dioxide emission process. A smart ironmak-ing system based on ACRES (iACRES) was discussed thermodynamically. Efficient regeneration of carbon material from carbon dioxide (CO_2) emitted from ironmaking system was a key technology for establishment of iACRES. Carbon monoxide (CO) was the appropriate carbon material in recycling system of iACRES because CO had high enthalpy for reduction of iron oxide. CO regeneration by CO_2 hydrogenation was employed for carbon recycling because the regeneration was the most practical technology in regeneration ways. Equilibrium analysis for CO recycling in iACRES was discussed. Effluent gas of an iron making process is generally mixture of CO_2 and CO. Effect of concentration of CO_2 in gas for reduction on CO regeneration was discussed. CO_2 had small negative effect on CO reduction. Then, CO and CO_2 separation process for effluent gas from ironmaking process was capable to be omitted in iACRES. The omission of the process would realize simplification and cost-reduction of processes in iACRES. A structure of iACRES using external H_2 and high-temperature heat was proposed. It was shown that hydrogen was useful material as reductnat for CO_2 reduction in iACRES.
机译:针对零二氧化碳排放过程,提出了一种基于碳循环的新能源转化概念,称为活性碳循环能源系统ACRES。热力学讨论了基于ACRES(iACRES)的智能熨烫系统。从炼铁系统排放的二氧化碳(CO_2)有效地再生碳材料是建立iACRES的关键技术。一氧化碳(CO)是iACRES回收系统中合适的碳材料,因为一氧化碳具有高的还原氧化铁焓。由于再生是再生方式中最实用的技术,因此采用通过CO_2加氢进行的CO再生来进行碳回收。讨论了iACRES中CO循环利用的平衡分析。炼铁过程中的废气通常是CO_2和CO的混合物。讨论了还原气体中CO_2浓度对CO再生的影响。 CO_2对减少CO的负面影响较小。然后,在iACRES中可以省去用于炼铁过程的废气的CO和CO_2分离过程。省略流程将实现iACRES中流程的简化和成本降低。提出了利用外部H_2和高温热的iACRES结构。结果表明,氢是iACRES中还原CO_2的有用还原材料。

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