The application of elaborately designed magnetic catalysts has long been limited to ease their separation from the products only. In this paper, we for the first time employed a magnetic sulphonated poly(styrene-divinylbenzene) resin catalyst on a magnetically stabilized-bed (MSB) reactor to enhance the etherification of fluidized catalytic cracking (FCC) light gasoline, one of the most important reactions in petroleum refining industry. We demonstrated that the catalytic performance of the magnetic acid resin catalyst on the magnetic reactor is substantially enhanced as compared to its performance on a conventional fixed-bed reactor under otherwise identical operation conditions. The magnetic catalyst has the potential to be loaded and unloaded continuously on the magnetic reactor, which will greatly simplify the current complex industrial etherification processes.
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http://dx.doi.org/10.1038/srep01973 | DOI Listing |
J Hazard Mater
January 2025
CEREGE, CNRS, Aix Marseille Univ, IRD, INRAE, Aix-en-Provence, France; Civil and Environmental Engineering, Duke University, Durham, NC, United States.
Within the ITER project (International Thermonuclear Experimental Reactor) an international project building a magnetic confinement device to achieve fusion as a sustainable energy source, tungsten (W) is planned to serve as a plasma-facing component (PFC) in the tokamak, a magnetic confinement device used to produce controlled thermonuclear fusion power. Post plasma-W interactions, submicron tungsten particles can be released. This study investigated the exposure of lentic freshwater ecosystems to ITER-like tungsten nanoparticles in indoor aquatic mesocosms.
View Article and Find Full Text PDFRev Sci Instrum
January 2025
College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, Jiangsu, China.
Nanosecond pulse power has many driving advantages in the dielectric barrier discharge (DBD) application field, including better discharge effect, higher discharge efficiency, and lower electrode temperature. A high-voltage pulse voltage power supply (HV-PVPS) with a multi-turn ratio linear pulse transformer (PT) based on Marx circuit and PT topologies are suitable for most DBD plasma applications with fewer expansion modules, lower cost, smaller volume, and higher reliability comparing with the all-solid-state Marx nanosecond pulse power supply. However, during the process of DBD driven by an HV-PVPS based on Marx and PT topologies, the PT is prone to magnetic core saturation, which limits the application for DBD.
View Article and Find Full Text PDFAdv Sci (Weinh)
January 2025
Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance Spectroscopy and Imaging, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430071, China.
Magnetic resonance imaging (MRI) is a cornerstone technology in clinical diagnostics and in vivo research, offering unparalleled visualization capabilities. Despite significant advancements in the past century, traditional H MRI still faces sensitivity limitations that hinder its further development. To overcome this challenge, hyperpolarization methods have been introduced, disrupting the thermal equilibrium of nuclear spins and leading to an increased proportion of hyperpolarized spins, thereby enhancing sensitivity by hundreds to tens of thousands of times.
View Article and Find Full Text PDFJ Phys Chem Lett
January 2025
International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia.
Nuclear magnetic resonance is extremely attractive for operando studies of chemical reactors. However, the heterogeneous catalyst particles placed inside an NMR probe greatly affect the uniformity of the magnetic field. This problem is especially acute when studying heterogeneous hydrogenation processes using parahydrogen.
View Article and Find Full Text PDFLangmuir
January 2025
Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India.
Understanding the droplet coalescence/merging is vital for many areas of microfluidics such as biochemical reactors, drug delivery, inkjet printing, oil recovery, etc. In the present study, we carried out numerical simulations of two magnetic droplets suspended in a nonmagnetic fluid matrix and coalescing under the influence of an external magnetic field. We observed that the applied magnetic field played a key role in the merging dynamics of the magnetic droplets.
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