JP Journal of Heat and Mass Transfer
Volume 15, Issue 4, Pages 813 - 828
(November 2018) http://dx.doi.org/10.17654/HM015040813 |
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THE EFFECT OF INITIAL PRESSURE ON CLATHRATE HYDRATE FORMATION OF PROPANE-BUTANE MIXTURES
Widya Wijayanti, Mega Nur Sasongko and Purnami
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Abstract: Gas hydrate formation has been considered essential for gas storage and transportation. The hydrate was characterized by the hydrate formation rate, stability and storage capacity. One of the important parameters in the formation of hydrates is the initial pressure of hydrate formation.
The present study experimentally investigates the effect of initial pressure on the propane-butane hydrate formation, the storage capacity and the stability. The study was conducted in a tank reactor with the speed rotation of 200 rpm. In the hydrate formation, 50 cm3 demineral water was pumped into the crystallizer. The 50% propane-50% butane was injected with the initial pressure (Pi) of 0.2-0.4 MPa. The temperature of cooling bath to form the hydrate was maintained at around 274 K, while the temperature of cooling bath to decompose hydrate (stability) was at around 268 K.
The result showed that greater is the initial pressure, shorter is the time needed to form hydrate. The hydrate to consume gas existed at the highest initial pressure Pi = 0.4MPa. The maximum gas consumption was 0.75 mol at 0.172 MPa. At the same initial pressure, the most stable hydrate of the propane-butane gas expressed by the least dissociation pressure of hydrateoccurred at 0.02 MPa. The highest level of stability hydrate occurred at 0.162 MPa. The hydrate storage capacity existed in the highest of the initial pressure at 39.61 V/V. |
Keywords and phrases: clathrate hydrate formation, propane, butane.
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