钙铜复合吸收剂的一步法合成及其CO2捕集性能

Investigation on One-step Synthesis of CaO/CuO Composite Pellets and their CO2 Capture Performance

    摘要
  • 摘要: 采用一步法制备了钙铜复合吸收剂颗粒，研究了制备参数对钙铜复合吸收剂颗粒中钙铜物质的量之比的影响。结果表明：通过调节钙铜前驱体混合溶液中的钙铜物质的量之比和吸附时间，可以获得钙铜物质的量之比为1、元素均匀分布的钙铜复合吸收剂颗粒；在固定床反应器上开展了煅烧还原-氧化-碳酸化循环实验，发现钙铜复合吸收剂颗粒的氧化性能非常稳定，而CO2捕集性能较稳定，初始CO2吸附量(每克吸收剂吸附CO2的质量)为0.18 g/g，10次循环后CO2吸附量的保持率为56%。

     

    Abstract: Calcium-copper composite absorber particles(CaO/CuO) were prepared by a one-step synthesis method, and the influence of preparation parameters on the molar ratio of calcium to copper within these particles was investigated. The results indicate that CaO/CuO composite absorbent particles with a molar ratio of one and uniform elemental distribution can be obtained by adjusting the molar ratio of Ca to Cu in the precursor solution and optimizing the adsorption duration. The calcining/reducing-oxidizing-carbonating cycle experiments were carried out on a fixed-bed reactor, and the oxidation performance of the composite pellets is highly stable, while the CO2 capture performance is relatively consistent. The initial CO2 adsorption capacity, measured as the mass of CO2 adsorbed per gram of absorbent, is 0.18 g/g. After ten cycles, the composite pellets maintain 56% of their initial CO2 capture efficiency, demonstrating sustained and reliable performance.

     

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