膜科学与技术

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Application of ceramic ultrafiltration membranes for dextran separation

Authors： ZHANG Yun, QI Ting, CHEN Xianfu, QIU Minghui, FAN Yiqun

Units： (State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China

KeyWords： ultrafiltration, ceramic membrane, dextran, separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2018,38(2):86-91

Abstract：

In this work, ZrO2 ultrafiltration membrane (MWCO=2700 Da) was used to separate and purify the dextran solution. The influences of operating pressure, temperature, crossflow velocity and feed concentration on membrane flux and retention rate as well as the stability were investigated. It’s demonstrated that the membrane flux and retention rate of dextran increased with transmembrane pressure. When the transmembrane pressure was 0.3 MPa, the separation factor of dextran and fructose reached the maximum. With the increase of temperature, the membrane flux increased but the retention rate of dextran fell down. With the increase of crossflow velocity, the membrane flux also increased. When crossflow velocity was 2.8 m/s, retention rates of dextran achieved up to 92%. When the feed concentration was 60 g/L, the separation performance of ceramic membrane was almost stable in a 12 h operating test. The flux and separation factor were stable at 24 L·m-2·h-1 and 11.5, respectively. The results indicated that the ZrO2 ultrafiltration membrane exhibited a good potential application in the separation and purification of dextran.

Funds：

国家自然科学基金项目（91534108，21506093，21706115）；国家高技术研究发展计划项目（2012AA03A606）；江苏高校优势学科建设工程(PAPD)；江苏省“六大人才高峰”项目(2012JNHB016)。

AuthorIntro：

第一作者简介: 张云(1993-), 女, 江苏省句容市人, 硕士, 从事膜分离材料的研究与应用. *通讯联系人

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