Towards fabrication of low-cost carbon/ceramics membranes:Substrate modification
This paper presents a novel method for fabrication of carbon membrane for gas separation by mean of surface modification with a conventional 2B pencil on the low-cost macroporous Al2O3 substrate. The resulting membrane was characterized by SEM, which shows that the modified membrane is continuous and uniform without defects. Gas permeation experiments were conducted by single gas measurements (test gas: H2, CO2, O2 and N2) at 20–80 °C under 100–400 kPa. The results show that the pencil lead layer can effectively prevent deep infiltration of precursor solution into the pores of substrate, and that gas transport through carbon membrane follows the molecular sieving mechanism. Based on the modified substrate, the carbon membrane exhibits good permeability (up to the order magnitude of 10-9 mol/m2 s Pa) and separation capability such as H2/N2 of 37.3, CO2/N2 of 11.2, and O2/N2 of 8.3.
carbon membrane substrate modification pencil coating porous ceramics gas separation
Chan Wang Yan Huang
State Key Laboratory of Materials-oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, China
国际会议
沈阳
英文
372-376
2011-11-22（万方平台首次上网日期，不代表论文的发表时间）