Similar Search Results

Three-dimensional imaging of multiphase flow in porous media

Turner, M.L.; Knüfing, L.; Arns, C.H.; Sakellariou, A.; … - In: Physica A: Statistical Mechanics and its Applications 339 (2004) 1, pp. 166-172

This paper reports progress in the 3D pore-scale micro-CT imaging of multiple fluid phases during drainage experiments in porous materials. Experiments performed on a sintered monodisperse bead pack and a Berea sandstone sample are described. It is observed that the residual (trapped) wetting...

Persistent link: https://www.econbiz.de/10011061819

Diffusion in porous materials as probed by pulsed gradient NMR measurements

Mitra, P.P. - In: Physica A: Statistical Mechanics and its Applications 241 (1997) 1, pp. 122-127

Due to recent activity involving diffusion measurements using pulsed gradient spin echo techniques, both experimental and theoretical, we now have a better understanding of diffusion of fluid molecules in a large class of natural and artificial porous media. At short times, the restrictions...

Persistent link: https://www.econbiz.de/10010587626

Polymeric foam properties derived from 3D images

Saadatfar, M.; Knackstedt, M.A.; Arns, C.H.; Sakellariou, A. - In: Physica A: Statistical Mechanics and its Applications 339 (2004) 1, pp. 131-136

We demonstrate the ability to calculate thermal conductance and elastic properties on three-dimensional images of industrial polymer foamed materials. Results for thermal conductivity and elasticity show little scatter and provide the basis for accurate empirical correlations between phase...

Persistent link: https://www.econbiz.de/10010874369

Characterization of tar generated from the mixture of municipal solid waste and coal pyrolysis at 800 °C

Tursunov, O.; Suleimenova, B.; Kuspangaliyeva, B.; … - In: Energy Reports 6 (2020) 1, pp. 147-152

. Gas chromatography-mass spectrometry (GC-MS)coupled with a trace GC and a nuclear magnetic resonance (NMR) spectrometer … 13C NMR spectra indicated that the functional groups of the tar derived from the mixture of MSW and coal were dominant at …

Persistent link: https://www.econbiz.de/10012652086

Quantitative analysis method of oil occurrences in tight reservoir

Li, Haibo; Liu, Xiangui; Yang, Zhengming; Guo, Hekun; … - In: Energy Reports 6 (2020), pp. 1067-1072

Combining NMR, high-speed centrifugal experiment, high pressure mercury injection and physical simulation experiment …

Persistent link: https://www.econbiz.de/10012652463

NMR analysis of cracking products of asphalt and assessment of catalyst performance

Ahmad, Imtiaz; Shakirullah, Mohammad; ur Rehman, Habib; … - In: Energy 34 (2009) 2, pp. 127-133

This paper reports 13C nuclear magnetic resonance (NMR) analysis of some crackates obtained from asphalt cracking in a … each run was analyzed by 13C NMR spectrophotometer using CDCl3 as dissolving solvent and tetramethyl silane (TMS) as … internal standard. The 13C NMR data was used to assess the extent of hydrocracking and degree of branching in crackates from …

Persistent link: https://www.econbiz.de/10010807907

Analytic considerations in the theory of NMR microscopy

Kenkre, V.M.; Sevilla, F.J. - In: Physica A: Statistical Mechanics and its Applications 371 (2006) 1, pp. 139-143

Nuclear magnetic resonance microscopy poses fundamental as well as practical challenges. The Torrey–Bloch equation obeyed by the magnetization density is basic to this field. We discuss exact solutions of the equation from a generalization that addresses the motion of the nuclear spins towards...

Persistent link: https://www.econbiz.de/10010872658

Production and characterization of biodiesel obtained from Sapindus mukorossi kernel oil

Chakraborty, M.; Baruah, D.C. - In: Energy 60 (2013) C, pp. 159-167

confirmed by the peaks appeared in 1H NMR and 13C NMR. The properties of the biodiesel are obtained using standard ASTM …

Persistent link: https://www.econbiz.de/10011054644

The truncated Levy-flight process: Application to the random spin phase change in non-linear magnetic fields

Posnansky, Oleg; Huang, Ruiwang; Jon Shah, N. - In: Physica A: Statistical Mechanics and its Applications 370 (2006) 2, pp. 553-564

In NMR experiments, self-diffusion of water molecules leads to a random spin phase distribution which is Gaussian in …

Persistent link: https://www.econbiz.de/10011062032

Understanding the chemical and structural transformations of lignin macromolecule during torrefaction

Wen, Jia-Long; Sun, Shao-Long; Yuan, Tong-Qi; Xu, Feng; … - In: Applied Energy 121 (2014) C, pp. 1-9

evaluated by elemental analysis, XRD, and CP–MAS 13C NMR methodologies. Under an optimal condition the terrified bamboo has a … thermal treatment were thoroughly investigated by FT-IR and solution-state NMR techniques (quantitative 13C NMR, 2D-HSQC, and … 31P-NMR methodologies). The results highlighted the chemical reactions of the native bamboo lignins towards severe …

Persistent link: https://www.econbiz.de/10011040983