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首页> 外文期刊>Energy >Fuel saving, carbon dioxide emission avoidance, and syngas production by tri-reforming of flue gases from coal-and gas-fired power stations, and by the carbothermic reduction of iron oxide
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Fuel saving, carbon dioxide emission avoidance, and syngas production by tri-reforming of flue gases from coal-and gas-fired power stations, and by the carbothermic reduction of iron oxide

机译：通过对煤和天然气发电厂的烟道气进行三重改造以及对氧化铁进行碳热还原，可节省燃料，避免二氧化碳排放并生产合成气

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摘要

Flue gases from coal, gas, or oil-fired power stations, as well as from several heavy industries, such as the production of iron, lime and cement, are major anthropogenic sources of global CO_2 emissions. The newly proposed process for syngas production based on the tri-reforming of such flue gases with natural gas could be an important route for CO_2 emission avoidance. In addition, by combining the carbothermic reduction of iron oxide with the partial oxidation of the carbon source, an overall thermoneutral process can be designed for the co-production of iron and syngas rich in CO. Water-gas shift (WGS) of CO to H_2 enables the production of useful syngas. The reaction process heat, or the conditions for thermoneutrality, are derived by thermochemical equilibrium calculations. The thermodynamic constraints are determined for the production of syngas suitable for methanol, hydrogen, or ammonia synthesis. The environmental and economic consequences are assessed for large-scale commercial production of these chemical commodities. Preliminary evaluations with natural gas, coke, or coal as carbon source indicate that such combined processes should be economically competitive, as well as promising significant fuel saving and CO_2 emission avoidance. The production of ammonia in the above processes seems particularly attractive, as it consumes the nitrogen in the flue gases.
机译：来自燃煤，天然气或石油发电厂的烟气，以及来自多个重工业的烟气，例如铁，石灰和水泥的生产，是全球CO_2排放的主要人为来源。基于这种烟气与天然气的三重转化，新提出的合成气生产工艺可能是避免CO_2排放的重要途径。此外，通过将氧化铁的碳热还原与碳源的部分氧化相结合，可以设计出一个整体热中性工艺，用于联产富含CO的铁和合成气。CO的水煤气变换（WGS） H_2可以产生有用的合成气。反应过程中的热量或热中性条件通过热化学平衡计算得出。确定热力学约束条件以生产适用于甲醇，氢气或氨气的合成气。对于这些化学商品的大规模商业生产，对环境和经济后果进行了评估。以天然气，焦炭或煤炭为碳源的初步评估表明，这种组合过程应具有经济竞争力，并有望显着节省燃料并避免CO_2排放。在上述过程中氨的生产似乎特别有吸引力，因为它消耗了烟道气中的氮。

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