Evaluation of an Engineered Form MOF CaSDB
Under the Off-Gas Sigma Team, Idaho National Laboratory (INL) and Pacific Northwest National Laboratoory (PNNL) have been able to study various sorbents for the separation of krypton (Kr) and xenon (Xe). PNNL has researched and prepared various metal-organic frameworks (MOFs) to use for the separation. Calcium–4,4’–sulfonyl dibenzoate (CaSDB), a high surface area MOF, was synthesized and sent to INL for deep bed testing. The MOF showed an acceptable saturation capacity, but a low breakthrough capacity; However, the recieved MOF was deemed as unusable in a flow system because of its powdery nature. In 2018, PNNL sent a sample of CaSDB – MOF powder to INL with the goal to incorporate it into an engineered form that maintained adsorption properties comparable to the original MOF. It was anticipated that the engineered form of the sorbent would possess sufficient mechanical strength to be used in a column, and eliminate the dustiness of the raw material to improve handling and operability. An engineered from of CaSDB – MOF (CaSDB – EF1) was produced by incorporating the raw powder into a polyacrylonitrile (PAN) binder. The PAN binding material eliminated the dustiness of the raw MOF and provided a robust matrix that prevents damage from handling and use in a column. Xe adsorption testing of the sorbent revealed that it performs as well or better than previous CaSDB samples tested at INL, with an initial breakthrough capacity of 14.4 mmol/ kg at ambient temperature. Reducing the operating temperature to 253 K resulted in an increased breakthrough capacity of Xe.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- US DOE Office of Nuclear Energy
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1542584
- Report Number(s):
- INL/EXT-19-54510-Rev000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multi-Column Experimental Test Bed Using CaSDB MOF for Xe/Kr Separation
Initial Evaluation of CaSDB MOF Xe and Kr Capacities