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Compatibility of a corrosion inhibitor with gas sweetening agents

Abstract:

A methodology to establish the effect of a corrosion inhibitor on the behavior of two gas sweetening agents namely an amine ("A") and a solid product constituted by iron oxides ("B"), has been developed. This information will be useful in case of traces of inhibitor passing through these two sweetening systems. Tests conducted in a static autoclave tester in gas sweetening conditions (temperature: 49°C and 57°C, pCO2: 634,3 kPa and pH2S: 0.10 kPa and 27,56 kPa) were made to determine the sour gas absorption power of the two agents, "A" and "B", in presence or absence of inhibitor. Additionally, the effect of the inhibitor on the foaming power of agent "A" was evaluated, at room conditions. According to the results obtained, in the range of conditions considered in this study, neither does the inhibitor affect the sour gas absorption power nor the foaming power of agent "A". Nevertheless, the anticorrosive product diminished by 12.5% the sour gas removal capability of agent "B".