Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4990214 | Separation and Purification Technology | 2017 | 21 Pages |
Abstract
Then conventional electrodialysis was performed to recover most of sulfuric acid (80%). The average faradic yield was quite good (80%) and the specific energy consumption of the electrodialysis stack was quite interesting (1.1 kW h per kg of H2SO4 recovered and 8.4 kW h per m3 of hydrolysate). Finally, the complete demineralization (conductivity < 10 μS·cmâ1) and discoloration (420 nm absorbance < 0.01) of the sugars solution was performed by ion-exchange and an activated carbon polishing treatment. The sugars purity was close to 100% meanwhile the overall sugars recovery rate reach about 90%. Finally we checked that the reused sulfuric acid solution was as efficient as a fresh one in a second hydrolysis operation of wheat bran. Recovery rates could be increased by a scale-up operation or a continuous mode of the process.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Claire-Line Blanc, Julien Lemaire, Fanny Duval, Marc-André Théoleyre, Dominique Pareau,