SUN Ruonan, TONG Zhi, ZHANG Qunchou, ZHOU Guangrui, LIU Ting, YAN Xiao, LI Yan
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In this study, Luochuan loess was used as raw material to prepare the tubular porous loess ceramic support by using the rolling molding method and solid particle sintering method. The main chemical components of natural loess were compared and analyzed. Using XRD diffractometer, SEM, mercury intrusion method, three-point bending method, mass loss method and self-made internal extraction, the crystal phase composition, microstructure, pore size distribution, flexural strength, acid-base corrosion mass loss rate and pure water flux of tubular loess-based ceramic support were characterized and tested. The effects of holding times on the properties of tubular loess-based ceramic support were investigated. The results show that the main components of Luochuan Loess were alumina, silica, and various metal oxides, which accounted for 15.6%, 56.7%, and 27.08%, respectively. When the heat treatment temperature was 1100 ℃ and the holding time was 120 min, the main crystal phase was quartz, hollow crystal and cristobalite. The average pore size was 4.68 μm, and the pure water flux was 1092 L/m2·h·MPa, the flexural strength was 31.46 MPa, and the mass loss rate of acid-base corrosion was 0.42/0.24%.