铜修饰铁矿石的化学链制氢特性实验研究

• 作 者: 王璐璐 沈来宏
• 机 构: 能源热转换及其过程测控教育部重点实验室,东南大学能源与环境学院,南京210096
• 出 处: 工程热物理学报
• 发表日期: 2017年12期
• 关键词: CO2 capture chemical looping hydrogen production copper modified hematite impreg

化学链制氢是一种耦合CO2捕集的高效制氢技术,铁基载氧体常应用于化学链制氢技术.赤铁矿的反应活性低且易发生析碳导致氢气纯度低,本文通过浸渍法添加铜修饰铁矿石,提高反应活性和制氢纯度.实验在小型流化床上进行,考察了850℃下化学链制氢过程中铜修饰对载氧体的反应活性、制氢性能、循环反应性质和析碳现象的影响.结果表明,与铁矿石比较,添加铜修饰可以显著提高载氧体反应活性和氢气产量,并且铜的添加可以有效抑制析碳,获得高纯度的氢气.在循环过程中,铜修饰铁矿石展现出更好的循环稳定性.“,”Chemical looping hydrogen production (CLHG) is a novel efficient hydrogen technology coupled with CO2 capture,Fe-based oxygen carrier was usually selected in the CLHG process.Hematite has passive reactivity and promotes carbon deposition which lead to the low hydrogen production and purity.Copper modified hematite by impregnation was used to improve the reactivity and hydrogen purity.In CLHG process,the reactivity,hydrogen production,cyclic stability and carbon deposition were tested at 850℃ in a batch fluidized-bed reactor.The reactivity and hydrogen production of modified hematite were greatly enhanced by adding copper and the addition of copper was beneficial to suppress carbon deposition to produce hydrogen of high purity.Moreover,the modified hematite showed stable performance during the cyclic reactions.