The use of renewable sources has been an alternative to decrease the negative environmental impacts of fossil fuels. In this context, bioethanol from sugarcane has proved to be a successful option to gasoline. However, bioethanol purification through conventional distillation requires high-energy demand. For this reason, energy balance calculations are very useful to estimate steam demand. As a result, simpler alternatives for estimation of steam consumption from spreadsheet calculations have been encouraged. In contrast, many efforts have focused to solve complex flowsheets including tear streams, which increases convergence complexity for each change on feed composition and additional components. In this work, mathematical models were fitted to bioethanol–water mixture property data and applied to energy balance calculations involved in the conventional process for hydrated bioethanol purification. Total steam consumption was obtained for volume percentages of bioethanol in the wine feed stream of 6, 8 and 10 °GL considering potential losses found in the industrial reality. The calculated data were compared to simulations carried out in the Aspen Plus^® software. Similar values of total steam consumption were found comparing the two approaches, where the average absolute relative deviation was kept below 5%. Moreover, simulated temperature and composition profiles agreed to process data. Finally, mathematical models and energy balance calculations proved to be a simpler and faster alternative to estimate total steam consumption involved in the hydrated bioethanol purification from wine.

中文翻译：

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特性建模，能量平衡和过程模拟在生物乙醇纯化中的应用

使用可再生资源已成为减少化石燃料对环境的负面影响的替代方法。在这种情况下，来自甘蔗的生物乙醇已被证明是汽油的成功选择。然而，通过常规蒸馏纯化生物乙醇需要高能量需求。因此，能量平衡计算对于估算蒸汽需求非常有用。结果，鼓励了用于从电子表格计算中估计蒸汽消耗的更简单的替代方法。相反，许多努力集中于解决包括泪流的复杂流程图，这增加了进料组成和附加成分的每次变化的收敛复杂性。在这项工作中 数学模型适用于生物乙醇-水混合物的性质数据，并应用于水合生物乙醇纯化常规工艺中涉及的能量平衡计算。考虑到工业现实中存在的潜在损失，在葡萄酒进料流中6、8和10°GL的生物乙醇体积百分比中获得了总蒸汽消耗。将计算出的数据与在Aspen Plus中进行的模拟进行比较^®软件。比较两种方法的总蒸汽消耗量相似，平均绝对相对偏差保持在5％以下。此外，模拟的温度和成分曲线可以处理数据。最终，数学模型和能量平衡计算被证明是估计葡萄酒中水合生物乙醇提纯所涉及的总蒸汽消耗的更简单，更快速的替代方法。