利用固态胺连续捕集二氧化碳的双流化床实验研究

Experiment research on CO2 continuous capture using dual fluidized bed reactors with supported amine

低温固态胺吸收剂分离CO2是一种非常有潜力的CO2分离技术,利用双流化床反应器实现连续高效CO2分离是此技术走向应用的关键。以商业硅胶颗粒为载体,以聚乙烯亚胺(PEI)为活性成分,通过浸渍法制备固态胺吸收剂,采用双流化床作为反应器,连续分离气体中的CO2。实验结果表明,所采用的双流化床反应器能够实现两反应器间固态胺颗粒的连续稳定循环,长期连续分离CO2的效率为84.4%;吸收反应器通入约1%的水蒸气后,捕集效率提高到约97%。

It is a potential technology to separate CO2 at a low temperature （40--80℃） by using amine functionalized porous material. For the application of this technology, it is crucial to realize continuous CO2 separation using dual-fluidized bed reactors. In this work, a dual fluidized bed reactors system based on supported amine sorbent was built to simulate continuous CO2 capture from flue gas. The supported amine sorbent was prepared by impregnating polyethylenimine （PEI） with molecular weight of 600 on porous silica gel Q-10. The experimental results indicated that the supported amine sorbent successfully circulated between the absorber and the regenerator and the long-term and continuous separation efficiency reached up to 84.4% without steam. And separation efficiency was improved about 97% with 1.0% （vol） steam introduced.