Chemical looping combustion is a promising power generation technology that produces sequestration-ready CO₂ and heat/power from the combustion of fossil fuels with oxygen provided by an oxygen carrier, or metal oxide, rather than air. Successful implementation of chemical looping combustion depends highly on the choice of oxygen carrier and the development of reaction rate parameters for process design and scale-up of the multi-reactor system. In this work, the reaction profile of a promising trimetallic oxygen carrier, copper iron manganese oxide with CO, a component of coal-derived synthesis gas was characterized using differential scanning calorimetry/thermogravimetric analysis and in-situ X-Ray diffraction. A unique phase formation with reactivities different from that with single metal components and phase changes during the reaction with CO were identified. Three major reactions were identified from the phase changes to use for reaction modelling. A particle-scale reaction model was selected which best described the experimental thermogravimetric analysis data to determine the valuable intrinsic reaction values for reactor design and scale-up. A particle-scale reaction model based on nucleation and growth and 1-D phase boundary behavior exhibited the most accurate correlation with the experimental data and provided intrinsic rate constants which were validated with the conventional mass transport analysis.

化学循环燃烧是一种有前途的发电技术，该技术可利用氧载体或金属氧化物而不是空气提供的氧，通过化石燃料燃烧来产生可螯合的CO ₂和热/功率。化学循环燃烧的成功实施在很大程度上取决于氧气载体的选择以及反应速率参数的开发，以进行工艺设计和多反应器系统的规模化。在这项工作中，使用差示扫描量热法/热重分析和原位表征了有希望的三金属氧载体，铜铁锰氧化物与CO（煤衍生的合成气的一种组分）的反应曲线。X射线衍射。鉴定出具有与单一金属组分不同的反应性的独特相形成以及与CO反应期间的相变。从相变中鉴定出三个主要反应，用于反应建模。选择了最能描述实验热重分析数据的颗粒级反应模型，以确定用于反应器设计和放大的有价值的固有反应值。基于成核和生长以及一维相边界行为的颗粒级反应模型表现出与实验数据最准确的相关性，并提供了固有速率常数，该常数已通过常规传质分析得到了验证。