1 research outputs found
Enhanced CO<sub>2</sub> Adsorption Performance on Hierarchical Porous ZSM‑5 Zeolite
Hierarchical porous ZSM-5 (HP-ZSM-5)
was constructed using organosilanes as the growth inhibitors for CO<sub>2</sub> capture. The properties of adsorbents were characterized
by X-ray diffraction, N<sub>2</sub> adsorption/desorption, scanning
electron microscopy, temperature-programmed desorption of carbon dioxide,
and <sup>27</sup>Al magic angle spinning nuclear magnetic resonance.
It was found that HP-ZSM-5 samples synthesized by organosilanes had
a significant effect on the microstructure and morphology. CO<sub>2</sub> adsorption capacity of HP-ZSM-5 was up to 58.26 cm<sup>3</sup> g<sup>–1</sup> at 0 °C and 1 bar, significantly higher
than that of the ZSM-5 sample. The effective improvement of CO<sub>2</sub> adsorption performance mainly originated from the micro-/mesoporous
composite structure and complex surface morphology, which can provide
low-resistant pathways for CO<sub>2</sub> through the porous network.
Besides, <i>in situ</i> Fourier transform infrared spectroscopy
was carried out to study the adsorption process on adsorbents, and
the results indicated that a faster physical adsorption process was
achieved as a result of the introduction of mesopores