Knowledge Management System Of Institute of process engineering,CAS
| Gypsum scaling in membrane distillation: Impacts of temperature and vapor flux | |
| Christie, Kofi S. S.1; Horseman, Thomas2; Wang, Ruoyu1; Su, Chunlei1,3,4; Tong, Tiezheng5; Lin, Shihong1,2 | |
| 2022-03-01 | |
| Source Publication | DESALINATION
 |
| ISSN | 0011-9164 |
| Volume | 525Pages:11 |
| Abstract | Mineral scaling by sparingly soluble gypsum (CaSO4 & BULL;2H(2)O) is a persistent challenge to membrane distillation (MD). The underlying relationship between the thermodynamic state of the precipitating solution and the point of flux decline due to rapid mineral growth remains unclear. In this work, a series of experiments along with a semi-empirical model are executed to examine the thermodynamic state of the feed solution at the feed/mem-brane interface to evaluate and compare the critical point of scaling. The experiments were deliberately designed in a way to decouple the influence of feed temperature and vapor flux. The thermodynamic state of the precipitating solution at the membrane interface is evaluated using the saturation index and the nucleation energy barrier derived from the chemical potential difference between the dissolved ions and the gypsum mineral. The model is rooted in established heat and mass transfer relationships and reflects the testing conditions used to carry out the experiments. The model is built upon experimental results across a range of operational conditions, with the bulk feed solution temperature ranging from 50 to 80 ? (at a constant flux) and the trans-membrane water flux ranging from 10 to 40 L m(-2) h(-1) (at a constant feed temperature). It was observed that interfacial saturation index calculated at the induction point was not consistent across different experiments, confirming that gypsum scaling in MD is controlled by kinetics instead of thermodynamics. We also found that temperature plays a more important role than vapor flux in affecting the critical recovery. Lastly, we also provide theoretical reasoning to support the experimental observation that gypsum scaling in MD is largely dominated by heterogeneous nucleation onto the membrane surface. |
| Keyword | Membrane distillation Scaling Gypsum Nucleation barrier height Metastability Induction point Feed temperature Flux |
| DOI | 10.1016/j.desal.2021.115499 |
| Language | 英语 |
| WOS Keyword | CALCIUM-SULFATE DIHYDRATE ; HETEROGENEOUS NUCLEATION ; CRYSTAL NUCLEATION ; PRECIPITATION ; DESALINATION ; MITIGATION ; KINETICS ; PERFORMANCE ; MECHANISMS ; WATER |
| Funding Project | National Science Foundation[1903685] ; National Science Foundation[1705048] ; National Science Foundation[1739884] ; GRFP award[DGE-1145194] |
| WOS Research Area | Engineering ; Water Resources |
| WOS Subject | Engineering, Chemical ; Water Resources |
| Funding Organization | National Science Foundation ; GRFP award |
| WOS ID | WOS:000782123800002 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/52784 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Lin, Shihong |
| Affiliation | 1.Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA 2.Vanderbilt Univ, Dept Chem & Biomol Engn, Nashville, TN 37235 USA 3.Chinese Acad Sci, Inst Proc Engn, Beijing Engn Res Ctr Proc Pollut Control, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Colorado State Univ, Dept Civil & Environm Engn, Ft Collins, CO 80523 USA |
| Recommended Citation GB/T 7714 | Christie, Kofi S. S.,Horseman, Thomas,Wang, Ruoyu,et al. Gypsum scaling in membrane distillation: Impacts of temperature and vapor flux[J]. DESALINATION,2022,525:11. |
| APA | Christie, Kofi S. S.,Horseman, Thomas,Wang, Ruoyu,Su, Chunlei,Tong, Tiezheng,&Lin, Shihong.(2022).Gypsum scaling in membrane distillation: Impacts of temperature and vapor flux.DESALINATION,525,11. |
| MLA | Christie, Kofi S. S.,et al."Gypsum scaling in membrane distillation: Impacts of temperature and vapor flux".DESALINATION 525(2022):11. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment