title: Fabrication of zeolite/polymer multilayer composite membranes for carbon dioxide capture: Deposition of zeolite particles on polymer supports.
abstract: Membranes, due to their smaller footprint and potentially lower energy consumption than the amine process, offer a promising route for post-combustion CO2 capture. Zeolite Y based inorganic selective layers offer a favorable combination of CO2 permeance and CO2/N2 selectivity, membrane properties crucial to the economics. For economic viability on large scale, we propose to use flexible and scalable polymer supports for inorganic selective layers. The work described in this paper developed a detailed protocol for depositing thin zeolite Y seed layers on polymer supports, the first step in the synthesis of a polycrystalline zeolite Y membrane. We also studied the effects of support surface morphology (pore size and surface porosity) on the quality of deposition and identified favorable supports for the deposition. Two different zeolite Y particles with nominal sizes of 200 nm and 40 nm were investigated. To obtain a complete coverage of zeolite particles on the support surface with minimum defects and in a reproducible manner, a vacuum-assisted dip-coating technique was developed. Images obtained using both digital camera and optical microscope showed the presence of color patterns on the deposited surface which suggested that the coverage was complete. Electron microscopy revealed that the particle packing was dense with some drying cracks. Layer thickness with the larger zeolite Y particles was close to 1 μm while that with the smaller particles was reduced to less than 0.5 μm. In order to reduce drying cracks for layers with smaller zeolite Y particles, thickness was reduced by lowering the dispersion concentration. Transport measurement was used as an additional technique to characterize these layers.
authors.affiliation: William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 458 CBEC Building, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA. Electronic address: ramasubramanian.8@buckeyemail.osu.edu.
authors.forename: Kartik
authors.initials: K
authors.lastname: Ramasubramanian
authors.affiliation: Department of Chemistry and Biochemistry, The Ohio State University, 458 CBEC Building, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA. Electronic address: severance.18@buckeyemail.osu.edu.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Severance
authors.affiliation: Department of Chemistry and Biochemistry, The Ohio State University, 458 CBEC Building, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA. Electronic address: dutta@chemistry.ohio-state.edu.
authors.forename: Prabir K
authors.initials: PK
authors.lastname: Dutta
authors.affiliation: William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 458 CBEC Building, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA; Department of Materials Science and Engineering, The Ohio State University, 458 CBEC Building, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA. Electronic address: ho.192@osu.edu.
authors.forename: W S Winston
authors.initials: WSW
authors.lastname: Ho
keywords: CO(2) capture; Hybrid membrane; Mixed-matrix; Multilayer composite; Polymer support; Zeolite Y