Abstract
In the present study, the effect of different kinds of impellers with different baffles or no baffle was investigated. Up-pumping pitched blade turbine (PBTU) and Rushton turbine (RT) were the two types of impellers tested. The reactor was equipped with different designs of baffles: full, half and surface baffles or no baffles. Single (PBTU or RT) and dual (PBTU/PBTU or RT/RT) use of impellers with full (FB), half (HB), surface (SB) and no baffle (NB) combinations formed two sets of 16 experiments. There was estimation of rate of hydrate formation, induction time, hydrate productivity, overall power consumption, split fraction and separation factor. In both single and dual impellers, the results showed that RT experiments are better compared to PBTU in rate of hydrate formation. The induction time is almost the same since we are deep in the equilibrium line while hydrate productivity values are higher in PBTU compared to RT experiments. As general view RT experiments consume more energy compared to PBTU experiments.
Highlights
Clathrates hydrates are defined as solid crystalline compounds which are formed by gas and water molecules [1,2]
Split fraction values of propane are much higher compared to the split fraction values of methane, as expected
Uniform shear field and good contact ability can be suspected to be the reason of this outcome
Summary
Clathrates hydrates are defined as solid crystalline compounds which are formed by gas and water molecules [1,2]. Water molecules, with their cage-like structure, are able to embrace guest gas molecules such as methane, ethane, propane, isobutene, n-butane, nitrogen, carbon dioxide, hydrogen sulfide, among others, to form clathrates hydrate [2,3]. There are three distinct hydrate structures, on the basis of both type and number of cavities and the size of guest molecules. These are structure I (sI), structure II (sII) and structure H (sH) [4,5,6]. While being only a topic of concern initially because of its impact on the oil and gas industry [9], recently it is becoming more promising, because of its evolved applications [10,11]
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