Design of an ammonium chloride aqueous solution concentration process using osmotically assisted reverse osmosis (OARO)

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-02-24 DOI:10.1016/j.seppur.2025.132266

Yota Fujii, Shuya Yoneyama, Masaru Nakaiwa, Keigo Matsuda

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引用次数: 0

Abstract

This study evaluated the separation performance of an ammonium ion concentration process in aqueous solutions using osmotically assisted reverse osmosis (OARO) membrane separation. The investigation focused on the advanced separation of an aqueous ammonium chloride solution (flow rate: 1000 kg/day, concentration: 0.4 wt%) by analyzing discharge pressure, membrane area, and reflux ratio as the main parameters for both OARO and RO systems. The results indicated that OARO achieved higher separation performance and energy efficiency compared to RO under conditions where discharge pressure exceeded 4.0 MPa, the reflux ratio was above 7.2, and the membrane area was at least 45 m². It was found that as the discharge pressure, membrane area and reflux ratio increased in OARO, the concentration ratio increased up to 50 times. Notably, it was suggested that reducing the membrane area towards the downstream side in OARO improves the concentration performance regardless of the total membrane area, identifying this as a key parameter in process design.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.