Experimental and Techno-Economic Analysis of Polybenzimidazole Thin-Film Membranes for Efficient Pervaporation Desalination of Produced Water

IF 4.4 2区 化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Andrew J. Ruba, Prashant Sharan, Michael P. Dugas, Harshul V. Thakkar, Kathryn A. Berchtold and Rajinder P. Singh*, 
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Abstract

Produced water is a massive wastewater source generated by hydraulic fracturing during oil and gas extraction. Due to high salinity (3000 to >300,000 mg/L) and presence of organic (≤1000 mg/L) impurities, thermal- or membrane-based separation processes of produced water are very expensive and challenging. Elevated temperature membrane desalination processes can efficiently treat high-salinity produced water containing organic impurities, provided thermo-chemical robust membrane materials are developed. Here, a highly selective and dense polybenzimidazole (m-PBI) thin-film membrane was extensively evaluated with a simulated brine, representative of brine produced from the San Juan basin, and a real brine obtained from the Permian Basin to demonstrate its thermo-chemical robustness for the treatment of high-salinity produced water. The membrane showed extremely high stability in the brine solutions at elevated temperatures approaching 200 °C and 99.9% salt and organic rejection, producing high-purity distillate. A detailed techno-economic analysis was carried out for a multistage PBI membrane-based pervaporation process using experimentally obtained data scaled to industrial membrane thicknesses. A minimum cost of $3.49 m–3 was calculated for an 18-stage pervaporation system to treat produced water, which is 50% lower than that compared to commercial brine concentrator technology for produced water treatment. More efficient elevated temperature pervaporation desalination is achieved by higher operating temperatures enabled by the thermo-chemical durability of the PBI membranes providing opportunities for efficient heat recovery.

Abstract Image

聚苯并咪唑薄膜高效渗透蒸发脱盐采出水的实验与技术经济分析
采出水是油气开采过程中水力压裂产生的大量废水来源。由于采出水的高盐度(3000 ~ 30000mg /L)和有机杂质(≤1000mg /L)的存在,基于热或膜的分离工艺非常昂贵且具有挑战性。高温膜脱盐工艺可以有效地处理含有机杂质的高盐度采出水,前提是开发出热化学坚固的膜材料。研究人员对高选择性致密聚苯并咪唑(m-PBI)薄膜进行了广泛的评估,使用了圣胡安盆地的模拟盐水和二叠纪盆地的实际盐水,以证明其处理高盐度采出水的热化学稳定性。在接近200°C的高温下,该膜在盐水溶液中表现出极高的稳定性,并且99.9%的盐和有机截留率,产生高纯度的馏出物。利用实验得到的按工业膜厚度缩放的数据,对多级PBI膜渗透蒸发工艺进行了详细的技术经济分析。根据计算,采用18级渗透蒸发系统处理采出水的最低成本为3.49 m-3美元,比商业盐水浓缩技术处理采出水的成本低50%。通过PBI膜的热化学耐久性,可以实现更高的工作温度,从而实现更高效的高温渗透蒸发脱盐,为高效的热回收提供了机会。
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来源期刊
CiteScore
7.20
自引率
6.00%
发文量
810
期刊介绍: ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.
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