Abstract The glycol purity limit in conventional absorption-based natural gas dehydration process has led to the significant water vapour presence in the supposedly dry product gas. Several alternative processes have been developed to overcome this limitation that includes stripping gas injection using nitrogen, a portion of dry product gas, or volatile hydrocarbon (DRIZO process), stripping gas modified with Stahl column, and Coldfinger technology. This review summarises these different processes and elaborates on their mechanisms, process flow diagram, advantages, drawbacks, and current statuses. Relevant works from 1991 to 2017 were compiled and the existing gaps were highlighted as recommendation for future work.

中文翻译：

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改进天然气脱水中现有的乙二醇技术以提高纯度和吸收效率：可用方法和最新进展

摘要 传统的基于吸收的天然气脱水过程中乙二醇纯度的限制导致在假定干燥的产品气中存在大量的水蒸气。已经开发了几种替代工艺来克服这一限制，包括使用氮气、部分干产品气或挥发性烃（DRIZO 工艺）的汽提气注入、使用 Stahl 塔改进的汽提气和 Coldfinger 技术。本综述总结了这些不同的过程，并详细阐述了它们的机制、过程流程图、优点、缺点和当前状态。汇编了 1991 年至 2017 年的相关工作，并强调了现有差距，作为对未来工作的建议。