Biogas upgrading with novel cellulose nano-crystals and polyvinyl amine nanocomposite membranes |
| |
Affiliation: | 1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan;2. Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan |
| |
Abstract: | A novel crystalline nano cellulose (CNC) and polyvinyl amine (PVAm) based nanocomposite membranes were synthesized and evaluated for biogas upgrading. Different concentrations of CNC was incorporated in 3 wt % PVAm solution on commercial polysulfone (PSf) sheet using dip coating method. The effect of feed pressure (5, 10 and 15 bar) was investigated for the CO2/CH4 separation. The incorporation of CNC increased the crystallinity of membranes. The thickness of selective layer enhanced to 2.16 μm from 1.5 μm with increasing concentration of CNC. However, degree of swelling reduced from 75.88% to 68.93 with CNC concentration at 1.5 wt%. The best results were shown by PVAm membrane with 1 wt % CNC concentration i.e. CO2 permeance of 0.0216 m3(STP)/m2.bar.hr and selectivity (CO2/CH4) of 41.The permeance decreased approximately 1.8 folds for PVAm/1CNC membrane with the increase in pressure from 5 to 15 bar. However, selectivity dropped from 41 to 39 for formulated membranes. |
| |
Keywords: | Polyvinyl amine Cellulose nano-crystals Biogas upgrading Nanocomposite membranes Fixed site carrier membranes |
本文献已被 ScienceDirect 等数据库收录! |
|