TY  - JOUR
A1  - Tippkötter, Nils
A1  - Roth, Jasmine
T1  - Purified Butanol from Lignocellulose – Solvent‐Impregnated Resins for an Integrated Selective Removal
JF  - Chemie Ingenieur Technik
N2  - In traditional microbial biobutanol production, the solvent must be recovered during fermentation process for a sufficient space-time yield. Thermal separation is not feasible due to the boiling point of n-butanol. As an integrated and selective solid-liquid separation alternative, solvent impregnated resins (SIRs) were applied. Two polymeric resins were evaluated and an extractant screening was conducted. Vacuum application with vapor collection in fixed-bed column as bioreactor bypass was successfully implemented as butanol desorption step. In course of further increasing process economics, fermentation with renewable lignocellulosic substrates was conducted using Clostridium acetobutylicum. Utilization of SIR was shown to be a potential strategy for solvent removal from fermentation broth, while application of a bypass column allows for product removal and recovery at once.
KW  - Biofuel
KW  - Biorefinery
KW  - Butanol
KW  - Clostridium acetobutylicum
KW  - Lignocellulose
Y1  - 2020
U6  - http://dx.doi.org/10.1002/cite.202000200
SN  - 1522-2640
VL  - 92
IS  - 11
SP  - 1741
EP  - 1751
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Roth, Jasmine
A1  - Tippkötter, Nils
T1  - Evaluation of lignocellulosic material for butanol production using enzymatic hydrolysate medium
JF  - Cellulose Chemistry and Technology
N2  - Butanol is a promising gasoline additive and platform chemical that can be readily produced via acetone-butanolethanol (ABE) fermentation from pretreated lignocellulosic materials. This article examines lignocellulosic material from beech wood for ABE fermentation, using Clostridium acetobutylicum. First, the utilization of both C₅₋ (xylose) and C₆₋ (glucose) sugars as sole carbon source was investigated in static cultivation, using serum bottles and synthetic medium. The utilization of pentose sugar resulted in a solvent yield of 0.231 g·g_sugar⁻¹, compared to 0.262 g·g_sugar⁻¹ using hexose. Then, the Organosolv pretreated crude cellulose fibers (CF) were enzymatically decomposed, and the resulting hydrolysate medium was analyzed for inhibiting compounds (furans, organic acids, phenolics) and treated with ionexchangers for detoxification. Batch fermentation in a bioreactor using CF hydrolysate medium resulted in a total solvent yield of 0.20 gABE·g_sugar⁻¹.
Y1  - 2016
VL  - 50
IS  - 3-4
SP  - 405
EP  - 410
PB  - Editura Academiei Romane
CY  - Bukarest
ER  -