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首页> 外文期刊>ISIJ international >Carbon Dioxide Reduction on a Metal-Supported Solid Oxide Electrolysis Cell
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Carbon Dioxide Reduction on a Metal-Supported Solid Oxide Electrolysis Cell

机译：金属负载的固体氧化物电解池上的二氧化碳还原

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Using iACRES, which is an ironmaking system based on the Active Carbon Recycling Energy System concept, to reduce or recycle CO_(2) emitted from ironmaking processes, we electrolyzed CO_(2) with a metal-supported solid oxide electrolysis cell (MS-SOEC) capable of providing a large cell surface area for the processing of large amounts of CO_(2). The MS-SOEC current-density–voltage (I-V) curves reveal a change in slope at around 0.8 V, which is the theoretical decomposition voltage of CO_(2). The CO production rate was 0.88 μ mol cm~(?2) s~(?1) when 2.0 V was applied between the cathode and the anode at 800°C, while that for O_(2) was 0.44 μ mol cm~(?2) s~(?1), which is consistent with the stoichiometry for CO_(2) electrolysis. The Faraday efficiency was 48% at 900°C. Gas was observed to leak from the cell; this leakage will need to be overcome through improvements in the layer-production process in order to achieve an efficiency close to 100%. On the basis of the cell-based experimental results, the feasibility of a blast furnace based on iACRES and driven by an HTGR (high-temperature gas-cooled reactor) was evaluated. To reduce CO_(2) emissions by 30.0%, the required MS-SOEC surface area was estimated to be 8.30×10~(4) and 3.98×10~(4) m~(2) with 968 and 480 MWth of HTGR thermal output under Faraday efficiency of 48% and 100%, respectively. We confirmed that iACRES using MS-SOEC contributes to realizing low-carbon ironmaking by recycling CO_(2) and reducing its emissions into the atmosphere.
机译：使用基于活性碳回收能源系统概念的炼铁系统iACRES减少或回收炼铁过程中排放的CO_（2），我们使用金属支撑的固体氧化物电解槽（MS-SOEC）电解了CO_（2） ）能够提供大的细胞表面积来处理大量的CO_（2）。 MS-SOEC的电流密度-电压（I-V）曲线显示在0.8 V左右的斜率变化，这是CO_（2）的理论分解电压。当在800℃下在阴极和阳极之间施加2.0 V电压时，CO的产生速率为0.88μmol cm〜（？2）s〜（？1），而O_（2）的CO产生率为0.44 μmol cm〜（？2）s〜（？1），与CO_（2）电解的化学计量一致。法拉第效率在900°C下为48％。观察到气体从电池泄漏;为了达到接近100％的效率，将需要通过改进层生产工艺来克服这种泄漏。根据基于单元的实验结果，评估了基于iACRES并由HTGR（高温气冷堆）驱动的高炉的可行性。为了减少30.0％的CO_（2）排放，估计所需的MS-SOEC表面积为8.3和9.8 MWth HTGR热分别为8.30×10〜（4）和3.98×10〜（4）m〜（2）。法拉第效率下的产出分别为48％和100％。我们确认，使用MS-SOEC的iACRES通过回收CO_（2）并减少其向大气中的排放，有助于实现低碳炼铁。

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