喷动床批量制备铁基氧载体及化学链实验研究

Investigations on Batch Preparation of Iron-Based Oxygen Carrier by Spouted Bed and Using in Chemical Looping Combustion of Coal

批量制备性能优良的氧载体是化学链燃烧技术的关键之一。本文提出采用喷动床造粒技术来批量制备铁基氧载体,利用自行设计的喷动流化床进行造粒实验,并在小型流化床台架上检验批量制备的不同种类铁基氧载体(Fe_2O_3/Al_2O_3,Fe_2O_3/SiO_2)与煤的化学链燃烧性能.研究结果表明,喷动床批量制备铁基氧载体具有可行性,反应性较佳,制备周期较短,产量较高,颗粒粒径容易控制,球形度较好,造粒成本较低,可以为大型化学链燃烧实验提供成本低廉且性能优异的大批氧载体。

The batch preparation of oxygen carrier （OC） particles with good performance is one of the key issues of Chemical Looping Combustion （CLC） technology. In this paper, Fe-based OC was prepared by a spouted bed. The performance of different kinds of Fe-based oxygen carriers （Fe203/AI203 and Fe203/SiO2） were examined in terms of CLC of coal in a laboratory-scale fluidized bed reactor. The results showed that the Fe-based oxygen carriers granulated by the spouted-bed technique exhibits good reactivity, and the batch preparation technique is feasible, with the characteristics of short granulation period, high yield, controllable particle size, good sphericity, and low cost. This technique can be used to produce a large amount of oxygen carriers with good performance and low cost for large-scale CLC experiments.