In this study, a hybrid desalination process based on carbon dioxide gas hydrate and capacitive deionization (CDI) is proposed to improve desalination performance. In this method, the formed gas hydrate crystals are dissociated and the produced water is conducted to the CDI process. To overcome the separation problem of the residual brine between hydrate crystals, a reactor that can be capable of compressing crystals was designed. Also, to improve the efficiency of the CDI process, electrodes were synthesized based on the activated carbon and their chemical properties modified using nitric acid. The performance of the gas hydrate, CDI, and hybrid desalination method examined for single and multi-salt aqueous solutions containing sodium, potassium, calcium, and magnesium with different concentrations. Also, the effects of the hydrate formation temperature, applied voltage, ion type and concentration on the ions removal efficiency have been investigated. The results showed that the compression of hydrate crystals in the hydrate desalination process, and using the modified activated carbon electrode in the CDI process could significantly improve the ions removal efficiency. The results showed that the proposed method could remove around 82% of Na⁺ and 100% of K⁺, Ca²⁺ and Mg²⁺ from saltwater with similar concentrations to seawater, respectively.

在这项研究中，提出了一种基于二氧化碳水合物和电容去离子（CDI）的混合脱盐工艺，以提高脱盐性能。在该方法中，将形成的气体水合物晶体解离，并将产生的水进行CDI处理。为了克服水合物晶体之间残留盐水分离的问题，设计了一种能够压缩晶体的反应器。另外，为了提高CDI工艺的效率，基于活性炭合成了电极，并使用硝酸对其化学性质进行了修饰。针对包含不同浓度的钠，钾，钙和镁的单盐和多盐水溶液，研究了气体水合物，CDI和混合淡化方法的性能。也，研究了水合物形成温度，施加电压，离子类型和浓度对离子去除效率的影响。结果表明，在水合物脱盐过程中压缩水合物晶体，在CDI过程中使用改性活性炭电极可以显着提高离子去除效率。结果表明，该方法可以去除约82％的Na。分别来自与海水浓度相似的盐水中的⁺和100％的K ⁺，Ca ²⁺和Mg ²⁺。