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Browsing by Subject "Dielectric Properties"

Now showing items 1-20 of 67

A comparative study of microwave and barrier discharge plasma for the regeneration of spent zeolite catalysts

Halman, A.; Bond, Gary; Eccles, H.; Mao, R.; Pollington, S.; Hinde, P.; Demidyuk, V.; Gkelios, A. (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] Due to their acid characteristics and pore structure, which can induce high product selectivity; zeolite catalysts are used extensively in industry to catalyse reactions involving hydrocarbons. However, these catalysts ...
A high-power source of optical radiation with microwave excitation

Churyumov, Gennadiy; Denisov, Oleksandr; Frolova, Tetyana; Wang, Nannan; Qiu, Jinghui (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] For more than 50 years, interest to the microwave heating technology has not weakened. In addition to the traditional areas of its application, which described in detail in [1], recently there has been an expansion ...
A new concept to improve microwave heating uniformity through data-driven process modelling

Zhou, Jing; Li, Yingguang; Li, Di (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] For a long time, the heating pattern of the workpiece within a multimode microwave oven was considered to be highly sophisticated. As a consequence, the uneven microwave heating problem can only be partly alleviated ...
Analysis of high-frequency c-core magnetic flux leakages for bone tumor with induction heating by using multi-coil

Jokpudsa, Metharak; Kotchapradit, Supawat; Thongsopa, Chanchai; Thosdeekoraphat, Thanaset (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] High-frequency magnetic field has been developed pervasively. The induction of heat from the magnetic field can help to treat tumor tissue to a certain extent. Normally, treatment by the low-frequency magnetic field ...
Application of dielectric resonators to surface impedance measurements of microwave susceptors

Celuch, Malgorzata; Rudnicki, Janusz; Krupka, Jerzy; Gwarek, Wojciech (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] This paper describes the application of dielectric resonators (DR) to the measurements of surface impedance of microwave susceptors. We demonstrate that the single-post (SiPDR) configuration is applicable to plain ...
Application of microwave and induction heating on fibre-reinforced cementitious materials for the demolition of structures

Treviño, Roque; Orbe, Aimar; Cuadrado, Jesus; Crespo, I.; Norambuena-Contreras, Jose (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] Nowadays, strengthening and refurbishing of existing structures on urban areas has gained interest in order to reduce costs by avoiding both the use of construction raw materials and the disposal of construction and ...
Automatic Measurement of Magnetron Rieke Diagrams

Bilik, Vladimir (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] A Rieke diagram [1] is a magnetron characteristic that visualizes the dependence of the generated frequency fg and the net delivered power PL on the load reflection coefficient GR. GR is defined in a specific ...
Comparison in mechanical properties of zirconium titanate (ZrTiO4) synthetized by alternative routes and sintered by microwave (MW)

Guillén Pineda, René Miguel; Borrell Tomás, María Amparo; Salvador Moya, Mª Dolores; Peñaranda Foix, Felipe Laureano; Moreno, R. (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] At present, ZrTiO4 nanopowders are used as a dielectric in the electroceramic field, applications of catalysis, microwave telecommunications devices, pigments, composites, etc. One of the most interesting applications ...
Continuous industrial-scale microwave-assisted extraction of high-value ingredients from natural biomass

Radoiu, Marilena; Splinter, Steven; Popek, T. (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] An innovative technology for the continuous extraction of bioactive compounds from a wide range of biological materials has been developed, scaled up and successfully demonstrated at commercially-relevant scales. The ...
Developing microwave chemistry under process engineering principles

Tioni, Estevan; Breysse, J.; Rousseaux, Pascal (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] It is nowadays admitted that microwaves are frequently used in organic chemistry labs [1] (even if not as much as it was predicted 20 years ago, one must say [2]). On the other side it is also certain that this ...
Development of Coaxial Type flow microwave reactor

Matsumura, Takeko; Kishihara, M.; Urushihara, U. (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] We have developed a flow microwave reactor with a coaxial cavity. It comprises a cylindrical cavity of 100 mm inside diameter, a metal rod along its center axis, and a spiral glass tube for flowing solvents and ...
Dielectric monitoring of the PAN fiber stabilization process

Hofele, Julia; Jung, M.; Link, Guido; Jelonnek, John (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] The production of carbon fibers based on Polyacrylonitrile (PAN) precursor fibers is a very energy intensive process. In order to increase the energy efficiency, microwave plasma processes and, alternatively, ...
Do a science experiment for future scientists

Kanematsu, Y.; Matsumura, Takeko (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] It has been realized that various chemical reactions are accelerated under irradiation of MW. Such Microwave chemistry is known as time-saving, clear and eco-friendly. MW ovens are world-wide domestic tools for cooking ...
Effectivenes of a microwave fluidised bed dryer in eradication of seed-borne botrytis grey mold of lentil

Taheri, Saeedeh; Brodie, Graham; Gupta, Dorin (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] A single mode microwave cavity, with a 2.45 GHz microwave source, was modified to have a microwave fluidized bed and its potential to eliminate Botrytis grey mold (BGM) pathogen of lentil seeds was evaluated. Air ...
Elucidation of electromagnetic wave effect and outgoing of future trend in microwave Chemistry and Biology

Horikoshi, Satoshi (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] Can we use microwaves as electromagnetic energy in the chemical and biological fields? We have been researching this question in many aspects and in a bird's-eye view. In response to this question, in some chemical ...
Enhanced microwave assisted processing of 2D cylindrical porous food dielectric

Kumari, Sushma; Samanta, Sujoy; Patel, Kush (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] The importance of microwave assisted thermal processing for the food industry relies on the fact of the procedure being economical and swift along with ensuring high quality product. The sample has been assumed as ...
Experimental Investigations of Microwave Effects on Rock Breakage Using SEM Analysis

Teimoori, Khashayar; Hassani, Ferri; Sasmito, Agus; Madiseh, Ali (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] Preconditioning of hard rocks by microwave energy has recently been considered a potentially effective technology in mechanical rock breakage for civil and mining engineering. To obtain the amount of mechanical damage ...
Experimental study of microwave slow wave comb and ceramic applicators for soil treatment at frequency 2.45 GHZ

Brodie, Graham; Torgovnikov, Grigory (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] In many cases in industry it is required to heat or treat surface layers of different material (soil, timber, concrete, plastics and so on) with microwaves (MW). Traditional MW irradiators (antennas) cannot provide ...
Faster plasticizers production by microwave irradiation

Jermolovicius, Luiz; Pouzada, Eduardo; Castro, Edmilson; Nascimento, Renata; Senise, José (Editorial Universitat Politècnica de València, 2019-10-15)

[EN] In this work the microwave effect of enhancing chemical reactions was applied to maleic anhydride esterification with 2-ethylhexanol-1 catalyzed by p-toluene sulfonic acid. The analysis of this reaction was simplified ...
Fe/MgO Powder Composite Sintered by Microwave Heating

Bureš, Radovan; Fáberová, Mária; Birčáková, Zuzana; Kovaľ, Vladimir; Kollar, Peter; Fuzer, Jan; Jakubcin, Milos; Slovensky, Peter (Editorial Universitat Politècnica de València, 2019-10-15)