Development of highly effective CaO@Al<sub>2</sub>O<sub>3</sub> with hierarchical architecture CO<sub>2</sub> sorbents <i>via</i> a scalable limited-space chemical vapor deposition technique
作者:Rui Han、Jihui Gao、Siyu Wei、Yanlin Su、Yukun Qin
DOI:10.1039/c7ta09960f
日期:——
stable CO2 uptake. The TEM results show that Al2O3 nanoparticles (4–8 nm) are uniformly coated onto CaO crystalline grains, thus effectively inhibiting the sintering of sorbents. After 20 severe cycles, the synthetic sorbent, stabilized by 10 mol% Al2O3, exceeded the CO2 uptake of the benchmark CaO by more than 300%. Furthermore, the influence of Ca-based precursors on the synthetic sorbent's cyclic
通过钙环的高温吸附CO 2是实现碳捕获和储存(CCS)的有前途的技术。但是,该技术的主要缺点是由于烧结导致CaO吸附剂快速失活。在此,提出了一种简便且具有成本效益的有限空间的金属有机化学气相沉积方法来开发基于CaO的吸附剂,该吸附剂具有很高的循环稳定性和对CO 2的吸收。TEM结果表明,Al 2 O 3纳米颗粒(4–8 nm)均匀地涂覆在CaO晶粒上,从而有效地抑制了吸附剂的烧结。经过20次剧烈循环后,合成吸附剂被10 mol%Al 2 O 3稳定超过基准CaO吸收的CO 2超过300%。此外,建立了基于钙的前体对合成吸附剂的环状CO 2吸收的影响。结果表明,由不同的Ca基前驱体合成的吸附剂均显示出高的循环稳定性,这意味着可以通过选择低成本的Ca前驱体(如CaCO 3)来合成低成本和高性能的吸附剂。