Galeotti Nadia, Jirasek Fabian, Burger Jakob, Hasse Hans
University of Kaiserslautern Laboratory of Engineering Thermodynamics (LTD) Erwin-Schrödinger Strasse 44 67663 Kaiserslautern Germany.
Technical University of Munich Chair of Chemical Process Engineering Campus Straubing for Biotechnology and Sustainability 94315 Straubing Germany.
Chem Eng Technol. 2018 Dec;41(12):2331-2336. doi: 10.1002/ceat.201800258. Epub 2018 Nov 8.
Wood hydrolysates contain sugars that can be used as feedstock in fermentation processes. For that purpose, the hydrolysate must be concentrated and inhibitors that harm fermentation must be removed. Herein, the integration of these tasks with the recovery of inhibitors is studied. The wood hydrolysate is represented as a mixture of water, xylose, acetic acid, and furfural. Acetic acid and furfural are two frequently occurring inhibitors and valuable chemicals, and thus, their recovery is studied. Furfural is recovered from the vapors by heteroazeotropic distillation. It is shown that this can be achieved without additional energy. The recovery of acetic acid by distillation is also possible, but not attractive. The new process is simulated by using a thermodynamic model based on experimental data.
木材水解液含有可在发酵过程中用作原料的糖类。为此，水解液必须进行浓缩，且必须去除对发酵有害的抑制剂。在此，研究了将这些任务与抑制剂回收相结合的方法。木材水解液被表示为水、木糖、乙酸和糠醛的混合物。乙酸和糠醛是两种常见的抑制剂和有价值的化学品，因此，对它们的回收进行了研究。糠醛通过共沸蒸馏从蒸汽中回收。结果表明，无需额外能量即可实现这一目标。通过蒸馏回收乙酸也是可行的，但并不具有吸引力。利用基于实验数据的热力学模型对新工艺进行了模拟。
