Abstract
The efficient separation of the 2,3-butanediol (2,3-BDO) intermediate from fermentation broth is an important issue in the production of biofuels from biomass-derived intermediates. Two zeolitic imidazolate frameworks ZIF-8 and ZIF-71 were investigated for the adsorption of 2,3-butanediol (2,3-BDO) from fermentation broth via liquid breakthrough adsorption measurements. While both ZIF materials initially show high separation performance, ZIF-71 retains robust separation performance even after aging in ethanol for two years, whereas the capacity of ZIF-8 decreases significantly. The robustness and stability of ZIF-71 are further confirmed with cyclic fixed bed adsorption measurements. The uptake of 2,3-BDO on ZIF-71 reaches >100 g/kg with negligible uptakes of sugars, organic acids, and other alcohols present in the fermentation broth. Excellent selectivity toward 2,3-BDO over water is also achieved. The 2,3-BDO-loaded ZIF-71 can be regenerated efficiently with ethanol as desorbent. These findings indicate that ZIF-71 shows considerable promise as an adsorbent to recover and purify diols from fermentation broths.
| Original language | English |
|---|---|
| Pages (from-to) | 16939-16944 |
| Number of pages | 6 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 62 |
| Issue number | 41 |
| DOIs | |
| State | Published - Oct 18 2023 |
Funding
S.N. and Y.C. acknowledge financial support from Oak Ridge National Laboratory (contract #4000170517). Y.C. and Q.F. acknowledge financial support from the Georgia Tech Renewable Bioproducts Institute Ph.D. Fellowship. W.L. acknowledges support for a visiting Ph.D. student appointment (2018-2020) from the China Scholarship Council (CSC). We acknowledge M. Z. C. Hu and A. L. Church (ORNL) for arranging supply of the fermentation product broth from NREL; and R. Elander and team (NREL) for production of the 2,3-BDO fermentation product broth.