A novel configuration of the Ca-Cu looping process based on dynamically operated packed-bed reactors is proposed to convert blast furnace gas (BFG) into H₂/N₂ and highly concentrated CO₂, accompanied by a large amount of high-temperature heat. Preliminary energy and mass balances of the process reveal that around 30% of the BFG can be upgraded via calcium assisted water gas shift (WGS) if only BFG is used as reducing gas in the reduction/calcination stage. A higher amount of H₂/N₂ can be produced by using other steel mill off gases, such as coke oven gas (COG) or basic oxygen furnace gas (BOFG), or natural gas in the regeneration of the CO₂ sorbent. This decarbonized fuel gas could be used for onsite power generation or to obtain sponge iron by a Direct Reduced Iron (DRI) process, increasing the overall capacity of the steel plant. Energy efficiencies higher than 75% have been calculated, reaching maximum values around 88% in case of using natural as fuel gas for the sorbent regeneration stage. Low values for the specific energy consumption of around 1.5 MJ_LHV/kg_CO2 and CO₂ capture efficiencies higher than 95% support the further development of the proposed Ca-Cu looping process.

提出了一种基于动态操作床反应器的Ca-Cu循环工艺的新配置，该工艺可将高炉煤气（BFG）转化为H ₂ / N ₂和高浓度CO ₂，同时伴随大量的高温热量。该过程的初步能量和质量平衡表明，如果在还原/煅烧阶段仅将BFG用作还原气体，则约30％的BFG可通过钙辅助水煤气变换（WGS）进行升级。较高的量h的₂ / N ₂可以通过使用其它钢厂废气，如焦炉煤气（COG）或碱性氧气炉气体（BOFG），或天然气中的CO的再生来产生₂吸附剂。这种脱碳的燃料气体可用于现场发电或通过直接还原铁（DRI）工艺获得海绵铁，从而提高了钢铁厂的整体产能。已计算出高于75％的能源效率，如果在吸附剂再生阶段使用天然气作为燃料气体，则可达到约88％的最大值。比能量消耗的低值约为1.5 MJ _LHV / kg _{CO 2，}并且CO ₂捕集效率高于95％，这支持了拟议的Ca-Cu循环工艺的进一步发展。