Haloalkaliphilic biological desulfurization has been recognized as a promising technology due to its remarkable economy and good performance. The process removes H₂S from gases using aqueous solutions of alkali carbonates. In this study, the solubility of H₂S in an aqueous Na₂CO₃–NaHCO₃ solution was first experimentally measured by a static analysis method at an operating pressure and temperature of biological desulfurization. An accurate and comprehensive thermodynamic model was developed based on the electrolyte nonrandom two-liquid model for the solubility of H₂S in aqueous solutions of alkali carbonates. The solubility of H₂S in pure water is predicted and compared favorably to previous literature, with the temperature varying from 298.16 to 377.45 K and pressure up to 39.6 bar. The average deviation of the model predictions compared to all experimental data is 0.95% for the solubility of H₂S in an aqueous Na₂CO₃–NaHCO₃ solution. This study will provide a valuable reference for the process design, simulation, and optimization of haloalkaliphilic biological desulfurization in the future.

中文翻译：

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H ₂ S 在嗜碱条件下的溶解度：使用电解质 NRTL 方程的实验测量和建模

卤代碱生物脱硫以其显着的经济性和良好的性能而被公认为是一种很有前途的技术。该过程使用碱金属碳酸盐的水溶液从气体中去除H ₂ S。在这项研究中，H ₂ S 在 Na ₂ CO ₃ -NaHCO ₃水溶液中的溶解度首先通过静态分析方法在生物脱硫的操作压力和温度下进行实验测量。基于电解质非随机二液模型，开发了一种准确而全面的热力学模型，用于研究 H ₂ S 在碱金属碳酸盐水溶液中的溶解度。H ₂的溶解度纯水中的 S 被预测并与之前的文献相比具有优势，温度从 298.16 到 377.45 K，压力高达 39.6 bar。对于 H ₂ S 在 Na ₂ CO ₃ –NaHCO ₃水溶液中的溶解度，模型预测与所有实验数据相比的平均偏差为 0.95% 。该研究将为今后卤代亲碱生物脱硫的工艺设计、模拟和优化提供有价值的参考。