二甘醇(DEG)、三甘醇(TEG)、四甘醇(T_4EG)和这些甘醇的混合物及其它甘醇,在天然气脱水方面都得到了应用。这一类甘醇有高吸湿度,良好的热稳定性和低蒸汽压。然而,各自的物理性质相当不同(见表1),因此,这些甘醇对于天然气脱水有很大差异。对任何新建的或原有的装置,甘醇的选择必须建立在对甘醇的初投资、装置的 Diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (T_4EG) and mixtures of these glycols and other glycols have all been used in the dehydration of natural gas. This type of glycol has high moisture absorption, good thermal stability and low vapor pressure. However, their physical properties are quite different (see Table 1) and, therefore, these glycols differ greatly in the dehydration of natural gas. For any new or existing installation, the choice of glycol must be based on the initial investment in glycol, the unit’s