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Here's a quick means to determine MeOH injection to inhibit hydrates

09/14/2009
This article proposes a set of reference charts developed by the authors for determining required methanol concentrations in the aqueous phase (rich solution) and total lean inhibitor's flow rate for a desired depression in hydrate formation temperature of a wet natural gas.The charts were generated for 100 wt % MeOH and pressures of 3 MPa (about 435 psi), 5 MPa, 7 MPa, and 9 MPa based on ProMax and for a natural gas mixture with relative density of 0.6 but are extended to gases with relative densities up to 0.8 by use of two correction factors. A simple equation extends the charts' use to other lean MeOH concentrations. Known data, resultsFlowing gas temperature = 40° C.Hydrate-...
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