Antifoam plays an essential role in maintaining the continuous removal of acid gases by the absorption process. However, a holistic review of the fundamentals and desirable selection criteria for different types of antifoams for the gas sweetening process is scarcely available. Therefore, this review analyses the selection criteria of each type of antifoam for acid gas sweetening, particularly silicone, polyether glycol, alcohol, and blended-based antifoams. These selection criteria are crucial in defining the properties and antifoaming performance in terms of solubility, dispersibility, surface tension, viscosity, defoaming rate, thermal stability, stability of defoaming performance, potential hazard, and chemical inertness. Hence, this review provides valuable insight into the existing and potential antifoams that could be employed in the acid gas sweetening process along with their distinctive antifoaming ability, benefits, and drawbacks. From this review, blended antifoam is able to fulfill most of the selection criteria and will be further explored in a subsequent study.

中文翻译：

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用于酸性气体脱硫工艺的消泡剂的选择标准

消泡剂在维持通过吸收过程持续去除酸性气体方面发挥着重要作用。然而，几乎没有对气体脱硫过程中不同类型消泡剂的基本原理和理想选择标准进行全面审查。因此，本综述分析了酸性气体甜味剂的每种消泡剂的选择标准，特别是有机硅、聚醚二醇、酒精和混合型消泡剂。这些选择标准对于定义溶解性、分散性、表面张力、粘度、消泡率、热稳定性、消泡性能稳定性、潜在危害和化学惰性等方面的特性和消泡性能至关重要。因此，本综述提供了对可用于酸性气体脱硫工艺的现有和潜在消泡剂及其独特的消泡能力、优点和缺点的宝贵见解。从这次审查来看，混合消泡剂能够满足大多数选择标准，并将在后续研究中进一步探讨。