AM-TEPA Impregnated Disordered Mesoporous Silica as CO 2 Capture Adsorbent for Balanced Adsorption–Desorption Properties

作者：Xiaoyun Zhang, Xiuxin Zheng, Sisi Zhang, Bei Zhao, Wei Wu · 发表于：Industrial & Engineering Chemistry Research · 年份：2012 · DOI：10.1021/ie300180u · 被引用次数：98 · 研究领域：Carbon Dioxide Capture Technologies、Membrane Separation and Gas Transport、Phase Equilibria and Thermodynamics

A disordered mesoporous silica was found to be a promising solid support for CO 2 capture. It was prepared with a process similar to that for MCM-41. X-ray diffraction characterization (XRD) and transmission electron microscopy (TEM) confirmed its disordered structure. N 2 adsorption–desorption tests indicated that its average pore size is significantly larger than that of MCM-41. On this support was deposited acrylamide (AM)-modified tetraethylenepentamine (TEPA), resulting in an adsorbent suitable for CO 2 capture. This material exhibited well balanced adsorption and desorption properties. Substantially higher CO 2 adsorption capacity (159.1 mg/g-adsorbent) was obtained with pure CO 2 at 25 °C, and satisfactory stability during 12 adsorption–desorption turnovers was achieved.