Project Details
Abstract
Xylenes have very broad applications in chemical industries. The mixed xylenes produced mainly consist of p-xylene, m-xylene, o-xylene and ethylbenzene. Due to their similar molecular structures, these isomers have close boiling points. Therefore, it is very difficult to separate them from each other by distillation.
Originally, this is a three-year proposal. Both static and dynamic melt crystallization will be studied both experimentally and theoretically to separate PX from the mixed xylenes. The effects of process conditions and impurities on crystal purity and recovery ratio will be investigated. Sweating process will be applied after melt crystallization to further purify the obtained PX. The mathematical model for static and dynamic melt crystallization will be developed to describe the heat and mass transfer in the studied system. The first-year project has been funded by MOST this year (2017/8-2018/7). A static melt crystallization experimental apparatus was designed to study the effects of process conditions on the resulting PX crystals. The effects of impurities on crystal purity and recovery ratio was investigated. The mathematical model for static melt crystallization was developed to describe the heat and mass transfer in the studied system.
For the next two-year proposal, in the first year, a dynamic melt crystallization experimental apparatus will be designed to study the effects of process conditions on the resulting PX crystals. The effects of impurities on crystal purity and recovery ratio will be investigated. The mathematical model for dynamic melt crystallization will be developed to describe the heat and mass transfer in the studied system. In the second year, sweating process will be applied after the static and dynamic melt crystallization to further purify the obtained PX. The effects of process conditions on crystal purity and recovery ratio will be investigated. The mathematical model for sweating process will be developed to describe the heat and mass transfer in the studied system.
Project IDs
Project ID:PB10901-2958
External Project ID:MOST108-2221-E182-034-MY2
External Project ID:MOST108-2221-E182-034-MY2
| Status | Finished |
|---|---|
| Effective start/end date | 01/08/20 → 31/07/21 |
Keywords
- Keywords: p-xylene
- separation
- purification
- melt crystallization
- sweating
Fingerprint
Explore the research topics touched on by this project. These labels are generated based on the underlying awards/grants. Together they form a unique fingerprint.