Increasingly strict environmental legislation is being applied to motor vehicle emissions. An important aspect of these regulations is the restriction of the amount of sulfur in vehicle transportation fuels. The process used to modify fuels and remove the sulfur is known as hydrodesulphurization (HDS). The HDS process requires novel catalyst materials that are often difficult to synthesize using traditional methods. Another synthesis method, mechanical alloying (MA), shows potential for producing catalysts but to date is not well documented for this application.
It is known that NEBULA (New Bulk Activity) catalysts based on Ni-Mo-W, are four times more active than typical catalysts and two times more than other advanced formulations. These types of catalysts opened the way to new bulk catalysts with improved catalytic activity in HDS.
In this work, researchers R. Huirache-Acuna, M. I. Flores Z., M. A. Albiter, I. Estrada-Guel, C. Ornelas, F. Paraguay-Delgado, J.L. Rico, L. Bejar-Gomez, G. Alonso-Nunez and R. Martinez-Sanchez, from Centro de Investigación en Materiales Avanzados (CIMAV) and Universidad Michoacana de San Nicolás de Hidalgo in Mexico prepared quaternary alloys of Ni-Mo-W-Al by mechanical alloying. In addition, a process of chemical extraction by alkaline leaching was applied to remove aluminum in order to increase the specific surface area (SSA) and to generate porous materials which were tested in the HDS of dibenzothiophene (DBT) to determine their catalytic activity and selectivity.
The catalyst materials produced were found to have a moderate catalytic activity, due to the synergized effect of small particle and crystal size, and presence of porosity.
Dr. Ian Birkby | EurekAlert!
Electron tomography technique leads to 3-D reconstructions at the nanoscale
24.05.2018 | The Optical Society
These could revolutionize the world
24.05.2018 | Vanderbilt University
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences