Solid-state 27Al MRI and NMR thermometry for catalytic applications with conventional (liquids) MRI instrumentation and techniques.
Multidimensional images of Al2O3 pellets, cordierite monolith, glass tube, polycrystalline V2O5 and other materials have been detected by 27Al, 51V, and 23Na NMR imaging using techniques and instrumentation conventionally employed for imaging of liquids. These results demonstrate that, contrary to the widely accepted opinion, imaging of "rigid" solids does not necessarily require utilization of solid state NMR imaging approaches, pulse sequences and hardware even for quadrupolar nuclei which exhibit line widths in excess of 100 kHz, such as 51V in polycrystalline V2O5. It is further demonstrated that both 27Al NMR signal intensity and spin-lattice relaxation time decrease with increasing temperature and thus can potentially serve as temperature sensitive parameters for spatially resolved NMR thermometry.
Koptyug
Igor V
IV
International Tomography Center, 3A Institutskaya St., Novosibirsk 630090, Russia. koptyug@tomo.nsc.ru
Sagdeev
Dmitry R
DR
Gerkema
Edo
E
Van As
Henk
H
Sagdeev
Renad Z
RZ
D000465:Algorithms; D000535:Aluminum; D000537:Aluminum Oxide / Q000032:analysis* / Q000737:chemistry*; D002384:Catalysis; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods*; D011208:Powders / Q000032:analysis / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D013817:Thermography / Q000295:instrumentation / Q000379:methods*
D011208:Powders; D012996:Solutions; D000535:Aluminum; D000537:Aluminum Oxide