Incorporation of Zr into Calcium Oxide for CO2 Capture by a Simple and Facile Sol–Gel Method
Incorporation of Zr into Calcium Oxide for CO2 Capture by a Simple and Facile Sol–Gel Method
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DOI：
10.1021/acs.iecr.5b04112
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发表时间：
2016-01
影响因子：
4.2
通讯作者：
Hong-Sheng Guo;Shengping Wang;Chun Li;Yujun Zhao;Qi Sun;Xinbin Ma
中科院分区：
文献类型：
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作者：
Hong-Sheng Guo;Shengping Wang;Chun Li;Yujun Zhao;Qi Sun;Xinbin Ma
采用简单易行的溶胶-凝胶法合成了一系列Zr掺杂CaO基吸收剂，Ca/Zr（30：1）样品表现出优异的CO2捕集能力（0.64 gCO 2/g吸收剂）和良好的稳定性（可达18次循环）。在900 °C高温脱碳条件下，脱硫剂的性能仍保持稳定。通过X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电镜（SEM）、透射电镜（TEM）和N2物理吸附测试等手段，研究了吸附剂的结构与性能的关系。CaO基吸收剂的良好CO2捕集特性归因于CaZrO 3纳米颗粒，其产生了防止烧结-团聚的惰性屏障、颗粒的纳米尺寸、优化的孔径分布以及Ca和Zr在吸收剂中的均匀分布。
A series of Zr-doped CaO-based sorbents were synthesized by a simple and facile sol–gel method, and sample of Ca/Zr (30:1) exhibited excellent CO2 capture capacity (0.64 g CO2/g sorbent) and favorable stability (up to 18 cycles). The performance of sorbent still remained stable when tested under a high decarbonation temperature of 900 °C. The structure–property relationship of the sorbents was explored by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and N2 physisorption measurement, respectively. The favorable CO2 capture characteristics of CaO-based sorbents were attributed to the CaZrO3 nanoparticles, which created an inert barrier preventing the sintering–agglomeration, the nanosize of the particles, optimized pore size distributions, and uniform distribution of Ca and Zr in the sorbent.