Zobrazeno 1 - 10
of 345
pro vyhledávání: '"Hirasaki, George"'
Autor:
Parambathu, Arjun Valiya, Chapman, Walter G., Hirasaki, George J., Asthagiri, Dilip, Singer, Philip M.
Kerogen-rich shale reservoirs will play a key role during the energy transition, yet the effects of nano-confinement on the NMR relaxation of hydrocarbons in kerogen are poorly understood. We use atomistic MD simulations to investigate the effects of
Externí odkaz:
http://arxiv.org/abs/2212.02489
Autor:
Singer, Philip M., Parambathu, Arjun Valiya, Santos, Thiago J. Pinheiro dos, Liu, Yunke, Alemany, Lawrence B., Hirasaki, George J., Chapman, Walter G., Asthagiri, Dilip
Atomistic molecular dynamics simulations are used to investigate $^1$H NMR $T_1$ relaxation of water from paramagnetic Gd$^{3+}$ ions in solution at 25$^{\circ}$C. Simulations of the $T_1$ relaxivity dispersion function $r_1$ computed from the Gd$^{3
Externí odkaz:
http://arxiv.org/abs/2102.10763
The intra-molecular $^1$H-NMR dipole-dipole relaxation of molecular fluids has traditionally been interpreted within the Bloembergen-Purcell-Pound (BPP) theory of NMR intra-molecular relaxation. The BPP theory draws upon Debye's theory for describing
Externí odkaz:
http://arxiv.org/abs/2006.06055
Autor:
Singer, Philip M., Parambathu, Arjun Valiya, Wang, Xinglin, Asthagiri, Dilip, Chapman, Walter G., Hirasaki, George J., Fleury, Marc
The mechanism behind the $^1$H NMR frequency dependence of $T_1$ and the viscosity dependence of $T_2$ for polydisperse polymers and bitumen remains elusive. We elucidate the matter through NMR relaxation measurements of polydisperse polymers over an
Externí odkaz:
http://arxiv.org/abs/2003.02370
Autor:
Parambathu, Arjun Valiya, Singer, Philip M., Hirasaki, George J., Chapman, Walter G., Asthagiri, D.
The mechanism behind the NMR surface relaxation and the large $T_1$/$T_2$ ratio of light hydrocarbons confined in the nano-pores of kerogen remains poorly understood, and consequently has engendered much debate. Towards bringing a molecular-scale res
Externí odkaz:
http://arxiv.org/abs/2001.07310
Autor:
Liu, Yunke, Wang, Xinglin, Hirasaki, George J., Vinegar, Eva G., Vinegar, Harold J., Singer, Philip M.
Publikováno v:
In Fuel 1 February 2023 333 Part 2
Akademický článek
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The translational-diffusion coefficient $D_T$ and the spin-rotation contribution to the $^1$H NMR relaxation time $T_{1J}$ for methane (CH$_4$) are investigated using MD (molecular dynamics) simulations, over a wide range of densities $\rho$ and temp
Externí odkaz:
http://arxiv.org/abs/1802.10191
Autor:
Vavra, Eric, Puerto, Maura, Bai, Chutian, Ma, Kun, Mateen, Khalid, Biswal, Lisa, Hirasaki, George
Publikováno v:
In Journal of Colloid And Interface Science September 2022 621:321-330