title: Sulfate ion (SO4(2-)) release from old and new cation exchange resins used in condensate polishing systems for power plants.
abstract: In this study, a dynamic cycle test, a static immersion method and a pyrolysis experiment were combined to examine the characteristics of SO4(2-) released from several new and old cation exchange resins used in condensate polishing systems for power plants. The results show that the quantity and velocity of SO4(2-) released from new and old resins tend to balance in a short time during the dynamic cycle experiment. SO4(2-) is released by 1500H (monosphere super gel type cation exchange resins) and 001 × 7 (gel type cation exchange resins) new and old cation exchange resins, the quantity of which increases according to immersion time. In the pyrolysis experiment, the quantity of SO4(2-) released from resins increases and the pH of the pyrolysis solution transforms from alkaline to acidic with an increase in temperature.
authors.affiliation: Changsha University of Science & Technology, Changsha, Chinese Hunan, China E-mail: zzp8389@163.com.
authors.forename: Zhi-Ping
authors.initials: ZP
authors.lastname: Zhu
authors.affiliation: Changsha University of Science & Technology, Changsha, Chinese Hunan, China E-mail: zzp8389@163.com.
authors.forename: Xue-Ying
authors.initials: XY
authors.lastname: Tang
authors.affiliation: Changsha University of Science & Technology, Changsha, Chinese Hunan, China E-mail: zzp8389@163.com.
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Yin
authors.affiliation: Changsha University of Science & Technology, Changsha, Chinese Hunan, China E-mail: zzp8389@163.com.
authors.forename: Wei-Wei
authors.initials: WW
authors.lastname: Yu