用三甘醇对含硫天然气脱水时 ，三甘醇会吸收一些H2S，其...

用三甘醇对含硫天然气脱水时 ，三甘醇会吸收一些H2S，其富液将在重沸器引起腐蚀，H2S与铁生成硫化铁，使溶液呈黑色，但对三甘醇的吸湿性能并无明显影响。天然气的酸气组分过高，必然会使三甘醇溶液的pH值（应在7.5～8之间）下降。生成有机酸，对脱水不利。When the natural gas containing sulfur is dehydrated with triethylene glycol, some H2S will be absorbed by the triethylene glycol, and its rich liquid will cause corrosion in the reboiler. H2S and iron will form iron sulfide, making the solution black, but it has no obvious influence on the hygroscopic property of triethylene glycol. Too high acid gas composition of natural gas will inevitably reduce the pH value of triethylene glycol solution (which should be between 7.5 and 8). The formation of organic acids is detrimental to dehydration.