The Effect of Experimental Conditions on Methane (95%)-Propane (5%) Hydrate Formation

2020-12-01
Longinos, Sotirios Nik
Parlaktuna, Mahmut
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.
ENERGIES

Suggestions

Kinetic Analysis of Methane-Propane Hydrate Formation by the Use of Different Impellers
Longinos, Sotirios Nik; Parlaktuna, Mahmut (2021-01-01)
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. The fi...
Statistical tolerancing using designed experiments in a noisy environment
Köksal, Gülser (Elsevier BV, 2003-03-01)
We consider the method of designed experiments for statistical tolerance analysis, and study the impact of experimental error on its results.-It is observed that presence of random error in the experiment environment (e.g. laboratory) could introduce bias in the moment estimators and increases their-respective variances. We propose adjustments to the method that would reduce the bias as well as the variance of these estimators. A numerical example is presented.
Fast cell determination of the DSMC molecules in multi-stage turbo molecular pump design
Sengil, N.; Edis, Fırat Oğuz (Elsevier BV, 2011-06-01)
In this study, an existing 2D parallel DSMC solver is modified, to analyze the multi-stage turbomolecular pumps more efficiently. Generally, molecule movements are traced cell-by-cell in DSMC solvers both in structured and unstructured meshes in order to determine which cell the DSMC molecule is positioned in. These calculations require time consuming trigonometric operations. If a nonrectangular physical domain can be converted into a rectangular computational domain using curvilinear coordinates, then it ...
Measuring technological pedagogical content knowledge (TPACK) through performance assessment
Akyüz, Didem (Elsevier BV, 2018-10-01)
Despite many studies conducted on TPACK, the relationships between the components of the framework and how to perform TPACK assessment remain to be important research questions. The aim of this study is to shed light on these two questions by analyzing lesson plans collected from 138 preservice mathematics teachers obtained from a technology-integration course over a period of five years. An instrument that describes each component of the TPACK framework was developed and applied to performance-assessment o...
Conceptual change oriented instruction and students' misconceptions in gases
Azizoğlu, Nursen; Geban, Ömer; Department of Secondary Science and Mathematics Education (2004)
The purpose of this study was to investigate the effects of conceptual change oriented instruction accompanied by demonstrations and gender on tenth grade students̕ understanding of gases concepts, and attitudes toward chemistry. Hundred tenth grade students from two classes taught by the same teacher in a public high school were enrolled in the study in the Fall semester of 2003-2004. Control group students were taught by traditionally designed chemistry instruction (TI), while experimental group students ...
Citation Formats
S. N. Longinos and M. Parlaktuna, “The Effect of Experimental Conditions on Methane (95%)-Propane (5%) Hydrate Formation,” ENERGIES, pp. 0–0, 2020, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/88502.