LI Mingzhe 1, ZHANG Yuntao 1, FU Hongming 1, SUN Guangshuai 1, CHEN Kepi 1,
CHEN Haiping 1, 2, LYU Yuzhen 1
(1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China; 2. National Thermal Power Engineering & Technology Research Center, North China Electric Power University,Beijing 102206, China)
Abstract: Using tetra butyltitan ate as titanium source and but anol as solvent, the pore structure of ceramic microfiltration membrane was regulated by using an in-situ liquid-phase deposition method. The effects of heat treatment temperature and time on microstructure of the ceramic microfiltration membrane were studied. Scanning electron microscopy (SEM) and mercury porosity method (MIP) were used to characterize microstructure, pore diameter and specific surface area of the ceramic membranes. Water recovery property of the ceramic membranes was measured by using flue gas water recovery test. It was shown that titanium dioxide particles formed new pore microstructure in the membranes, thus regulating the specific surface area. Under the optimum condition, the specific surface area of the membrane was increased by 14 times. The quality of flue gas recovery water can be enhanced by nearly 86% after the treatment of the membranes, while the water flux is only reduced by about 18%.
Key words: ceramic microfiltration membrane; in-situ liquid-phase deposition; specific surface area; pore diameter; flue gas water recovery