Storage of methane gas in propane hydrate

CHED 1030

Yazmin Lee Cazares, ycazares@uci.edu, Department of Chemistry, University of California, Irvine, 17552 Rosa Drew Lane Apt 18B, Irvine, CA 92612
Gas hydrates, also known as clathrates, are of interest due to their gas storage potential and ability to be used as a transportation medium. Gas hydrates are solids with a similar structure to that of ice. However, they are more complex than ice because they consist of cages of water that form around gas molecules that are held together by hydrogen bonding. The van der Waals forces between the trapped gas molecules are what maintain the structure stabile under low temperature and high pressure. In the laboratory, samples of hydrocarbon hydrates are formed over 6 days to study their thermodynamic properties that will help us find a practical way to store methane. In our experiment, our starting material is snow which is inserted into a sample cell that is pressurizes with propane and methane gas. Propane hydrate is first formed and used as a storage medium for methane gas. These mixed gas hydrates are composed under modest pressures and temperatures. On the last day of the experiment, temperature and pressure data is monitored with the computer and is collected as mixed clathrates are slowly decomposed.