Studies on application of Petcoke-based graphene membranes for CO2 separation

Abstract

ABSTRACT Graphene-based separation membranes exhibit high separation potential to separate ions and molecules by the interlayer spacing with high surface area, porosity and tunable nanosized channels. The large-scale manufacturing of graphene-based membranes for gas separation is limited and challenging. Deposition of uniform, and selective ultrathin films as membrane is a big challenge for scalable separation with existing methods. In present study, solvent-ink-jet printing technique is applied for dispersing and uniform coating of graphene layers onto the membrane support. Preparation of graphene-based ink is the core objective of the operation for evaluating stability, coating and followed by separation studies. As prepared, graphene ink is filled in the cartridge of HP Desk-Jet-1110 series, which is available and slightly modified for the printing on the RO-membrane as support. The prepared membranes are characterized and analyzed for gas separation performance study. The decrease in gas composition of CO2 in permeate is observed and around 93% ± 0.5 of CO2 is separated from the gaseous mixtures.