Method developed to determine interfacial diffusion of H2S slugs in gas pipeline

Based on a presentation to the 4th International Pipeline Conference, Sept. 29-Oct. 3, 2002, Calgary.The research described here examined the fate of H2S-contaminated natural gas slugs as they travel through a gas pipeline network. The important phenomenon that affects the spread of the H2S slug as it travels downstream of a pipe is the diffusion with the sweet gas at the front and back interfaces of the slug.The research determined that the diffusivity constant (D) used in calculating the interface spread varies along the pipeline, which prohibits use of a closed-form solution of the Fick's law equation. An effective time parameter was introduced to account for the variation in the d...

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