A study of hydrates in the methane-propylene-water system

✍ Scribed by Frederick D. Otto; Donald B. Robinson

• Publisher: American Institute of Chemical Engineers
• Year: 1960
• Tongue: English
• Weight: 490 KB
• Volume: 6
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690060419

✦ Synopsis

Abstract

Experimental data are presented to show the points of incipient hydrate formation in the methane‐propylene‐water system. The addition of 1.4% propylene to methane lowered the equilibrium pressure 400 lb./sq. in. at 50°F. The locus of the four‐phase equilibrium consisting of hydrate, vapor, water‐rich liquid, and hydrocarbon‐rich liquid was determined. This was terminated by the appearance of a critical condition at 1,370 lb./sq. in. abs. and 69.3°F., where the vapor phase contained 34.8% propylene on a dry basis. Below this pressure the hydrate, vapor, water‐rich liquid equilibrium does not exist for solutions containing more than about 25% propylene. Solid‐vapor equilibrium ratios were estimated for propylene hydrates. The significant features of the phase diagrams for the system are discussed in some detail.