空气汽提生产生物乙醇的可行性和能量评估。
Feasibility and energetic evaluation of air stripping for bioethanol production.
机构信息
Institute of Food Science and Biotechnology, Department of Yeast Genetics and Fermentation Technology, Universität Hohenheim, Garbenstr. 23, 70599 Stuttgart, Germany.
Institute of Food Science and Biotechnology, Department of Yeast Genetics and Fermentation Technology, Universität Hohenheim, Garbenstr. 23, 70599 Stuttgart, Germany.
出版信息
Bioresour Technol. 2017 May;231:109-115. doi: 10.1016/j.biortech.2017.02.001. Epub 2017 Feb 4.
Stripping of mashes with air as stripping gas and low ethanol contents between 3 and 5wt% was investigated in terms of its suitability for continuous bioethanol production. Experiments in a Blenke cascade system were carried out and the results were compared with values obtained from theoretical vapour-liquid-equilibrium calculations. The whole stripping process was energetically evaluated by a simulation in ChemCAD and compared to conventional distillation. Therefore several parameters such as temperature, air volume flow and initial ethanol load of the mash were varied. Air stripping was found to be a suitable separation method for bioethanol from mashes with low concentrations. However, energetic aspects have to be considered, when developing a new process.
采用空气作为汽提气体并将乙醇浓度降低至 3-5wt%，考察了醪液的汽提条件，以评估其用于连续生物乙醇生产的适宜性。在 Blenke 级联系统中进行了实验，并将结果与理论汽液平衡计算值进行了比较。通过 ChemCAD 模拟对整个汽提过程进行了能量评估，并与传统蒸馏进行了比较。因此，改变了醪液的温度、空气体积流量和初始乙醇负荷等参数。研究发现，空气汽提是从低浓度醪液中分离生物乙醇的一种合适方法。然而，在开发新工艺时，必须考虑能量方面的问题。
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