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首页> 外文期刊>Separation and Purification Technology >Feasibility analysis of isopropanol recovery by hybrid distillation/pervaporation process with the aid of conceptual models
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Feasibility analysis of isopropanol recovery by hybrid distillation/pervaporation process with the aid of conceptual models

机译：借助概念模型，通过混合蒸馏/全蒸发工艺回收异丙醇的可行性分析

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摘要

In this contribution, main results of a techno-economic feasibility study to recover spent isopropyl alcohol (IPA) from a pre-treated waste stream composed by IPA (95.64 wt.%) and water (4.36 wt.%) are presented. Based on conceptual models for the unit operations, a quasi-optimal design for a hybrid process combining pervaporation and distillation is found under process specifications given by a pharmaceutical company. The proposed procedure allows a separated design of each unit with the aid of conceptual models. While distillation is evaluated from pinch theory, the conceptual model for pervaporation considers that the maximum driving force (i.e., no liquid temperature drop) is maintained across the membrane unit. A brief performance comparison for different membranes is also performed as part of the assessment to the company. For this purpose, the pervaporation separation index (PSI index) defined as the product of the permeate mass flux and the separation factor was used for membranes for which either literature data or membrane supplier brochures were available. In the case of the membrane PERVAP 2216 from Sulzer, several pervaporation experiments at 80 °C and permeate pressure of 1.52 kPa were carried out. The PSI index was then redefined as the overall separation factor times the inverse of the minimum membrane area required to perform a given separation. The results obtained emphasize the usefulness of conceptual modeling in all steps of process design.
机译：在这项贡献中，提出了一项技术经济可行性研究的主要结果，该研究从IPA（95.64 wt。％）和水（4.36 wt。％）组成的预处理废物流中回收废异丙醇（IPA）。根据单元操作的概念模型，在制药公司提供的工艺规范下，发现了将全蒸发和蒸馏结合在一起的混合工艺的准最佳设计。所提出的程序允许借助概念模型对每个单元进行单独的设计。虽然从收缩理论评估蒸馏，但是用于全蒸发的概念模型考虑跨膜单元维持最大驱动力（即，没有液体温度下降）。作为对公司评估的一部分，还将对不同膜进行简短的性能比较。为此目的，将渗透蒸发分离指数（PSI指数）定义为渗透物质量通量和分离因子的乘积，可用于可获得文献数据或膜供应商手册的膜。对于Sulzer的PERVAP 2216膜，在80°C和1.52 kPa的渗透压下进行了多次渗透实验。然后将PSI指数重新定义为总分离因子乘以执行给定分离所需的最小膜面积的倒数。获得的结果强调了概念建模在过程设计的所有步骤中的有用性。

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