▎ 摘　　要

In this work, we proposed a mixed matrix membrane prepared by using a glycerol modified guar gum (GGP) polymer matrix incorporated with graphene oxide (GO). The influence of varying GO concentration on the gas separation performance was investigated and 2 wt% was found to be the optimum concentration for high performance. The 2 wt% GO mixed matrix membranes were further modified with Pd nanoparticles. When GO, and Pd nanoparticles were mixed, CO2 permeability increased by 49.94%, while the permeability of H2 gas molecules decreased by 98.11%, respectively, compared to the pristine GGP mem-brane. The selectivity of CO2/H2 was obtained as 18.27. The glass transition temperature of the membrane increased from 85 to 95.2 degrees C, tensile strength and elongation of the break were significantly improved by 29.09% and 84.37% through the addition of Pd and GO into the membrane. The scanning electron microscopy revealed a dense top surface after GO nanosheets incorporation. Further, the thermogravimetric analysis proposes that the modified membrane is thermally stable than GGP. Henceforth, the study suggests GO incorporation and Pd nanoparticles modification of guar gum membrane is a promising gas separation membrane with potentially high selectivity for CO2 gas. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.