Synthesis and evaluation of a nanocomposite hydroxy sodalite/ceramic (HS/ceramic) membrane for pre-combustion CO2 capture: Characterization and permeation test during CO2/H2 separation

Oloye, Olawale; Eterigho-Ikelegbe, Orevaoghene; Daramola, Michael O.

doi:10.1016/j.mset.2019.10.005

Cited by 1 publication

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“…Daramola et al [36,37] synthesized nanocomposite hydroxy sodalite (HSOD) ceramic membranes via the PPH technique but the gas permeation measurement and capability of the membrane to sieve molecules was not investigated. Oloye et al [38] reported the procedure developed by Daramola et al [36,37] in preparing nanocomposite sodalite (SOD)/ceramic membrane via one-stage and two-stage PPH synthesis. The authors reported SOD fully plugged the 200 nm layer of the α-alumina ceramic support and the nanocomposite SOD/ceramic membrane prepared was moderately selective towards hydrogen as confirmed by SEM.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Evaluation of Nanocomposite Sodalite/α-Al2O3 Tubular Membranes for H2/CO2 Separation

2020

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Nanocomposite sodalite/ceramic membranes supported on α-Al2O3 tubular support were prepared via the pore-plugging hydrothermal (PPH) synthesis protocol using one interruption and two interruption steps. In parallel, thin-film membranes were prepared via the direct hydrothermal synthesis technique. The as-synthesized membranes were evaluated for H2/CO2 separation in the context of pre-combustion CO2 capture. Scanning electron microscopy (SEM) was used to check the surface morphology while x-ray diffraction (XRD) was used to check the crystallinity of the sodalite crystals and as-synthesized membranes. Single gas permeation of H2, CO2, N2 and mixture gas H2/CO2 was used to probe the quality of the membranes. Gas permeation results revealed nanocomposite membrane prepared via the PPH synthesis protocols using two interruption steps displayed the best performance. This was attributed to the enhanced pore-plugging effect of sodalite crystals in the pores of the support after the second interruption step. The nanocomposite membrane displayed H2 permeance of 7.97 × 10−7 mol·s−1·m−2·Pa−1 at 100 °C and 0.48 MPa feed pressure with an ideal selectivity of 8.76. Regarding H2/CO2 mixture, the H2 permeance reduced from 8.03 × 10−7 mol·s−1·m−2·Pa−1 to 1.06 × 10−7 mol·s−1·m−2·Pa−1 at 25 °C and feed pressure of 0.18 MPa. In the presence of CO2, selectivity of the nanocomposite membrane reduced to 4.24.

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