Fabrication and Performance Evaluation of Industrial Alumina Based Graded Ceramic Substrate for CO₂ Selective Amino Silicate Membrane

Abstract

The present study mainly focuses on the careful design of an amino-silicate membrane integrated on an asymmetric graded membrane substrate, comprised of a cost-effective macroporous industrial alumina based ceramic support with a systematic graded assemblage of sol−gel derived γ-alumina intermediate and silica-CTAB sublayer-based multilayered interface, specifically dedicated for the separation of CO 2 gas from the binary gas mixture (CO 2 /N 2 ) under nearly identical flue gas atmospheric conditions. The tailor-made industrial α-alumina-based porous ceramic support has been characterized in terms of apparent porosity, bulk density, flexural strength, microstructural feature, pore size, and its distribution to demonstrate its application feasibility toward the evolution of the subsequent membrane structure. The near surface morphology of the subsequent intermediate and submembrane layer has been carefully controlled via precisely scheming the colloidal chemistry and consequently implementing it during the deposition process of the respective γalumina and silica-CTAB precursor sols, whereas the potentiality of the quarantined amine groups in the final amino-silicate membrane has been methodically optimized by the appropriate heat treatment process. Finally, the real-time applicability of the hybrid amino-silicate membrane has been evaluated in terms of systematic analysis of the binary gas (CO 2 /N 2 ) separation performance under variable operating conditions. The investigated ceramic membrane exhibited optimum CO 2 permeance of 46.44 GPU with a CO 2 /N 2 selectivity of 12.5 at 80 °C under a trans-membrane pressure drop of 0.8 bar having a feed and sweep side water flow rate of 0.03 mL/min, which shows its performance reliability at nearly identical flue gas operating conditions.

Mixed Matrix Membranes for Carbon Capture and Sequestration: Challenges and Scope

“…Sharma et al fabricated an amino-silicate membrane integrated on a cost-effective macroporous industrial alumina-based ceramic support. The synthesized ceramic membrane displayed a CO 2 permeance of 46.44 GPU with a CO 2 /N 2 selectivity of 12.5 at 80 °C . However, owing to the challenges of the mass-production of defect free inorganic membranes, polymeric membranes and mixed matrix membranes predominate in commercial uses …”

Surface Engineering of Zr BDC Nanoparticles via Conjugation with Lysine to Enhance the CO2/N2 Separation Performance of Chitosan Mixed Matrix Membranes under Dry and Humid Conditions

“…In an ideal situation, the filler would provide molecular sieving or Knudsen diffusion separation pathway for a CO 2 molecule that is thermodynamically preferable to the solution-diffusion transport mechanism found in most polymeric membranes . While many fillers, such as single- or multi-walled carbon nanotubes, graphene oxide, silica, quantum dots, porousorganic frameworks, covalent organic frameworks, metal–organic frameworks (MOFs), zeolite, and carbon molecular sieves, have been incorporated into MMMs. − Due to the presence of both organic ligands and metal centers in MOFs, it has a synergistic effect in the efficiency toward CO 2 capture. In addition to the inherent properties of MOFs, they also provide tunability to their shape and size.…”

Engineering of the structural and morphological characteristics of MWCNTs employing a nano-dimensional binary oxide coating with enhanced thermal oxidation resistance properties for the tailoring of their reinforcement potential

“…Amongst the various possible synthesis strategies, ALD has recently gained research attention, especially due to the ability to support the conformal deposition of a surface protective film with controlled thickness and uniform continuity, 32 but, considering the synergetic goals of minimal process complexity and widespread technical feasibility, the present study intends to utilize the beneficial aspects of sol-gel-based synthesis strategies. 34,35 Specifically, the sol-gel route has always been a useful tactic for generating a simple, cost-effective, and universal processing approach, permitting efficient control from the molecular-level precursor to the final product, and thus providing great assistance in maintaining the close mixing and good interfacial adhesion of the inorganic oxide thin film with the underlying CNT surface. [36][37][38] However, to be more precise, it is worth noting that efficiency, reliability, and durability are three major factors that are key in order to specifically obtain and accordingly implement the true technological potential of one-dimensional (1D) CNTinorganic oxide nano-hybrid structures for specific end-use application.…”