STUDY ON CONCENTRATING SULFURIC ACID SOLUTION BY VACUUM MEMBRANE DISTILLATION

来源期刊：中南大学学报(英文版)1999年第2期

论文作者：Zhang Guiqing Zhang Qixiu Zhou Kanggen

文章页码：99 - 102

Key words：membrane distillation; sulfuric acid; vacuum

Abstract: Concentrating sulfuric acid solution by vacuum membrane distillation with flat PEFEmembrane is explored. The effects of sulfuric acid concentration, temperature of the feed, the vacuum degree of the vacuum side on the flux of membrane distillation and the separation efficiency of acid are investigated. The results illustrate that the flux of the membrane distillation increases with the rise of feed temperature and the vacuum degree of the vacuum side, but it decreases with the rise of the sulfuric acid concentration of the feed. The separation efficiency of acid is correlated with the flux of membrane distillation; the separation efficiency of the acid can amount to 100% in the process, when operative conditions are properly controlled. It can also been obtained from the experiment that, compared with other methods of membrane distillation, the vacuum membrane distillation can obtain greater distillation flux.