A numerical model of a Chemical Looping Combustion (CLC) fixed bed reactors network for CH₄ combustion is developed and studied in the present paper. The network is based on a parallel arrangement of couples of reactors in series. For every couple, the first reactor is filled with a Cu-based oxygen carrier (OC) while the second one exploits a Ni-based OC. The developed model allows to evaluate the performances of the proposed system in terms of both generated thermal power and flow and composition of the gaseous output streams.

For the same bed length and cross-sectional area, the proposed two-stage CLC reactor has similar performances to a single carrier one in terms of outlet gas temperature, allowing however for shorter cycle times and requiring a lower amount of active phases contents with respect to this latter. Moreover, fewer units to be arranged in the network are required for the proposed two-stage CLC system than the single-stage one.

本文建立并研究了CH ₄燃烧化学循环燃烧（CLC）固定床反应器网络的数值模型。该网络基于串联的反应堆对的并联布置。对于每对夫妇，第一个反应器中均填充有基于铜的氧气载体（OC），第二个反应器中则采用了基于镍的OC。所开发的模型允许根据产生的热功率以及气体输出流的流量和组成来评估所提出系统的性能。

对于相同的床长和截面积，所提出的两级CLC反应器在出口气体温度方面具有与单一载体相似的性能，但是允许较短的循环时间并且相对于所需的活性相含量较低对于后者。而且，对于所提出的两阶段CLC系统，与单阶段CLC系统相比，需要在网络中布置的单元更少。