PEO - A new hydrate inhibitor polymer

Karaaslan, U
Parlaktuna, Mahmut
The hydrate inhibition potential of four different polymers has been tested in a high-pressure apparatus at high pressures and low temperatures. Aqueous polymer solutions were prepared at 1 wt % concentration. Methane (99.5% purity) was used as hydrate former gas. Hydrate formation rates of the tests were calculated to decide the best inhibitors. A known hydrate inhibitor, poly(N-vinylpyrrolidone) (PVP) and a water-soluble thermoplastic polymer TEO) were determined the best kinetic inhibitors among them.


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Solmus, Ismail; Yamali, Cemil; KAFTANOĞLU, BİLGİN; Baker, Derek Keıth; Caglar, Ahmet (2010-06-01)
The equilibrium adsorption capacity of water on a natural zeolite has been experimentally determined at different zeolite temperatures and water vapor pressures for use in an adsorption cooling system. The Dubinin-Astakhov adsorption equilibrium model is fitted to experimental data with an acceptable error limit. Separate correlations are obtained for adsorption and desorption processes as well as a single correlation to model both processes. The isosteric heat of adsorption of water on zeolite has been cal...
Exceptionally thermally stable, hydrocarbon soluble Ziegler-type Ir(0)(n) nanoparticle catalysts made from [Ir(1,5-COD)(mu-O2C8H15)](2) plus AlEt3: Tests of key hypotheses for their unusual stabilization
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In recent work we showed that Ziegler-type nanoparticles made from [Ir(1,5-COD)(mu-O2C8H15)](2) plus AlEt3 are an unusually thermally stable (>= 30 min at 200 degrees C), hydrocarbon-solvent soluble, high catalytic activity nanoparticle catalyst (I.K. Hamdemir, S. Ozkar, K.-H. Yih, J.E. Mondloch, R.G. Finke, ACS Catal. 2 (2012) 632-641). As such, they are analogous to-and currently the cleanest and best characterized model system for-Ziegler-type nanoparticles made from Co or Ni precatalysts plus AlEt3 whic...
Facilitation of water management in low Pt loaded PEM fuel cell by creating hydrophobic microporous layer with PTFE, FEP and PDMS polymers: Effect of polymer and carbon amounts
ÖZTÜRK, Ayşenur; FIÇICILAR, BERKER; Eroğlu, İnci; BAYRAKÇEKEN YURTCAN, Ayşe (2017-08-17)
Microporous layers (MPLs) were prepared with different hydrophobic polymers to establish water management in polymer electrolyte membrane (PEM) fuel cells. Besides conventionally used polymers polytetrafluoroethylene (PTFE) and fluorinated ethylene propylene (FEP), two different molecular weights (MW) of polydimethylsiloxane (PDMS) polymer were used as hydrophobic materials in MPL. Membrane electrode assemblies (MEAs) having MPLs with low MW PDMS polymer exhibited the best fuel cell performance compared to ...
PHPA as a Frictional Pressure Loss Reducer and Its Pressure Loss Estimation
Ozbayoglu, M. E.; Ercan, C. (Informa UK Limited, 2010-01-01)
This article analyzes the performance of a liquid polymer emulsion containing partially hydrolyzed polyacrylamide/polyacrylate (PHPA) copolymer as a circulating system pressure loss (drag) reducer. Straight cylindrical pipe flow experiments were performed at different concentrations of solutions for measuring frictional pressure losses. Comparison of measured and theoretical frictional pressure loss values showed that as the PHPA concentration increased, considerable drag reduction (as high as 60%) was achi...
Terahertz absorption spectrum of para and ortho water vapors at different humidities at room temperature
Xin, X.; Altan, Hakan; Saint, A.; Matten, D.; Alfano, R. R. (2006-11-01)
Terahertz time-domain spectroscopy has been used to measure the absorption of water vapor in 0.2-2.4 THz range from low to high humidity at room temperature. The observed absorption lines are due to the water molecular rotations in the ground vibrational state. We find that the absorption strength of para transitions increases as humidity increases, while the absorption strength of ortho transitions increases and then decreases in intensity with increasing humidity. We explain this difference based on the n...
Citation Formats
U. Karaaslan and M. Parlaktuna, “PEO - A new hydrate inhibitor polymer,” ENERGY & FUELS, pp. 1387–1391, 2002, Accessed: 00, 2020. [Online]. Available: