*Foaming di absorber MDEA* itu musuh utama unit CO₂ removal. Kalau busa naik, gas CO₂ lolos, amine carry-over, tower banjir, DP tinggi. ### *7 Penyebab Utama Foaming di Absorber MDEA* #### *1. Kontaminan dari Feed Gas - Paling Sering 80% Kasus* MDEA itu basa + polar, gampang jadi "sabun" kalau ketemu pengotor. Kontaminan | Sumber | Mekanisme Bikin Busa **Hydrocarbon berat C10+** | Kondensat, lube oil kompresor, carry-over inlet separator | Kerja kayak surfaktan. 5-10 ppm aja udah bikin stabil busanya **Aromatik BTEX** | Gas alam, kondensat | Nurunin tegangan permukaan MDEA **Solid halus** | FeS, Fe₂O₃ karat, clay, scale | Jadi inti busa. Gelembung nempel nggak mau pecah **Amine degradation product** | MDEA kepanasan >125°C | Bicine, THEED, DEA → punya gugus polar + non-polar = deterjen **Heat Stable Salt HSS** | Formate, acetate, thiocyanate, chloride | Bikin viskositas naik, busa tahan lama. Limit aman <0.5% wt **Corrosion inhibitor** | Dari upstream, biasanya amine-b...
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