October 2007

Special Report: Process Control and Information Systems

Effective pH control through intelligent automation

This technology can improve reliability while reducing operating costs

Queeney, K., van der Wal, S., Mettler-Toledo Ingold

Corrosion control and hazardous hydrogen sulfide (H2S) gas releases in hydrocarbon processing industry (HPI) facilities are under increased scrutiny due to the expanded processing of sour crude. While pH control plays an important role, pH analyzers in HPI applications show poor track records when it comes to reliability. As a result, inline measurements are usually ignored by operations due to poor performance and the inability of manufacturers to resolve problems. Even when a solution is found, natural variations in feedstock and processing conditions make it difficult to develop an acceptable maintenance routine. More attention is now being focused on operation efficiencies and profit

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