Chapter 5

Inhibiting Hydrate Formation with Chemicals

Abstract

The subject of this chapter is the inhibition of hydrates using chemicals. The main focus of this chapter is the thermodynamic inhibitors: alcohol, glycol, and ionic salts. Methods are presented for estimating the effect of these chemicals. A thorough review of the use of methanol, the most common hydrate inhibitor, is presented. This includes providing the reader with the tools to estimate the required methanol injection rate, including loses to the vapor and the hydrocarbon liquid. Important properties of the inhibitors are also discussed in some detail, including safety aspects. Sections are also included covering the so-called low dosage inhibitors: kinetic inhibitors and anti-agglomerants. ...

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