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Bio-synthetic natural gas as fuel in steel industry reheating furnaces - A case study of economic performance and effects on global CO_2 emissions

机译：钢铁工业加热炉中用作燃料的生物合成天然气-经济表现及其对全球CO_2排放的影响的案例研究

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摘要

Climate change is of great concern for society today. Manufacturing industries and construction account for approximately 20% of global CO_2 emissions and, consequently, it is important that this sector investigate options to reduce its CO_2 emissions. One option could be to substitute fossil fuels with renewable alternatives. This paper describes a case study in which four future energy market scenarios predicting 2030 were used to analyse whether it would be profitable for a steel plant to produce bio-SNG (bio-synthetic natural gas) in a biomass gasifier and to substitute LPG (liquefied petroleum gas) with bio-SNG as fuel in reheating furnaces. The effects on global CO_2 emissions were analysed from a perspective in which biomass is considered a limited resource. The results from the analysis show that investment in a biomass gasifier and fuel conversion would not be profitable in any of the scenarios. Depending on the scenario, the production cost for bio-SNG ranged between 22 and 36 EUR/GJ. Fuel substitution would reduce global CO_2 emission if the marginal biomass user is a producer of transportation fuel. However, if the marginal user of biomass is a coal power plant with wood co-firing, the result would be increased global CO_2 emissions.
机译：气候变化是当今社会关注的焦点。制造业和建筑业约占全球CO_2排放量的20％，因此，该部门研究减少CO_2排放的选择很重要。一种选择是用可再生能源替代化石燃料。本文描述了一个案例研究，其中使用了四个预测2030年的未来能源市场情景来分析钢铁厂在生物质气化炉中生产生物SNG（生物合成天然气）并替代LPG（液化）是否有利可图。石油气）与生物SNG一起作为加热炉的燃料。从认为生物质是一种有限资源的角度分析了对全球CO_2排放的影响。分析的结果表明，在任何情况下，对生物质气化炉和燃料转化的投资均无利可图。根据情况，生物SNG的生产成本在22至36欧元/ GJ之间。如果边缘生物质使用者是运输燃料的生产者，则燃料替代将减少全球CO_2排放。但是，如果生物质的边际使用者是燃煤的燃煤发电厂，则将导致全球CO_2排放量增加。

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