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In the reprocessing process of the spent fuels, Japan Atomic Energy Agency has been developed the microwave heating direct denitration method to produce a mixed oxide (MOX) powder from a uranyl ...
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A temperature study was conducted demonstrating the heating effect of exposure to MW radiation on PTFE vessels which were empty or had 20 ml water. Infrared imaging showed a marked rise in the temperature of the vessel with water and no rise in …
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Sultant et al. and other studies found that the low-temperature denitration performance of Fe-ZSM-5 was mainly related to the reducibility of metal ions, and high-temperature denitration performance was mainly related to the acid site, and the addition of metal ions could improve the low-temperature activity of the catalyst.
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A method has been developed for producing mixed actinide oxides suitable for fabricating mixed nitride uranium plutonium fuel for fast neutron reactors. The method is based on the use of microwave radiation for the direct denitration of actinide nitrate solutions. The possibility of producing uranium, plutonium, and neptunium-mixed oxides …
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The plutonium content was analyzed by the α-radiometric method. Energies 2022, 15, 6618 4 of 9 Figure 1. Scheme of the laboratory microwave denitration unit in the glove box. 2.2. Mixed U and Ce Oxides Produced in a Microwave Denitration Pilot Unit To study the scaling effect, a mock-up of the microwave denitration pilot unit was created.
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Low sintering flue gas temperatures and large temperature fluctuations require the development of low-temperature and efficient SCR (selective catalytic reduction) catalysts suitable for the sintering process. It has been shown that modified Mn-Ce/TiO2 catalysts have good denitration capability and have potential commercial use. In this …
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Microwave digestion is a simple yet powerful process. It heats samples in a sealed vessel using microwave radiation, quickly raising the temperature and pressure. This rapid heating breaks down the samples much faster than traditional methods like a hot plate or an oven.
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Prepare vessels in seconds. Experience the easiest to use microwave digestion system ever built. Simply add your sample and acid to the BLADE vessel and snap on a cap. Load your vessel into the autosampler and the BLADE will then process your samples automatically, including cool down.
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Panjiva provides data that powers global trade. Using information from 30 sources, we have shipment and customs records, company overviews and contact information on over 10 …
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SNCR technology is a low-cost smoke denitration method. In order to increase the denitration rate in the smoke denitrating process, this article designed a typical SNCR processing chart, mixed the reduced urea fertilizer liquid with the output water from the dilution water modules and sprayed them into the hearth to be denitrated after …
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White laboratory label tape can also be used to label vessels. Tape should be placed on the frame or sleeve during digestion to prevent charring of the paper surface of the tape. Be careful with tapes and labels. Some adhesive materials will absorb microwaves and can damage vessels. Test a small piece in the microwave before using on a vessel.
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The Microwave Digestion High-throughput Microwave Sample Preparation Workstation MDS-15 outer vessel, crafted from ultra-strong aerospace composite fiber, excels in anti …
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Denitration process vessel: Three types of quartz process vessels (1 l each) namely dish shaped, wide neck and narrow neck beakers were taken for MicroWave Direct Denitration experiments. 3. Jaw crusher: The feed material was passed through the no-rebound hopper before entering the crushing chamber. The size reduction takes …
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Microwave energy has been in use for many applications for more than 50 years, from communication, food processing, and wood drying to chemical reactions and medical therapy. The areas, where microwave technology is applied, include drying, calcination, decomposition, powder synthesis, sintering, and chemical process control. Before the …
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MARS 6™ with iWave®vessel sensing technology has brought tremendous advantages to microwave digestion, including the use of disposable vessel inserts. Vessel inserts offer a convenient way to process samples. The choice of insert will depend upon acid type and blank values required, based on the limit of quantification for a particular analysis.
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In this paper, the denitration process was studied by depressing the pressure inside the vessel where the solution is denitrated. Intermediate and final …
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The NOx in the cement calcination process is mainly composed of fuel-based NOx produced by coal combustion and thermal NOx produced by nitrogen and oxygen in a high-temperature environment (Kantorek et al., 2021).Since the NOx produced by coal combustion accounts for the main part, the amount of coal fed to the calciner (u …
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This vessel is based upon the simplicity of MARSXpress™ vessel but allows for a larger working volume due to the 110 mL vessel volume. The MARSXpress Plus™ is designed to run samples similar to the …
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The current position of QUARTZ is at Gulf of Mexico reported 25 hours ago by AIS. The vessel is en route to the port of Veracruz, Mexico, sailing at a speed of 9.3 knots and expected to arrive there on Sep 12, 23:00.The vessel QUARTZ (IMO 9681170, MMSI 538006178) is a Chemical/Oil Products Tanker built in 2015 (9 years old) and currently …
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reduces microwave power so that the temperature does not exceed a preset limit. By controlling the internal temperature of each vessel Precise control of digestion processes in each vessel. Rotor 24HVT50, Rotor 24HVT80 and Rotor 41HVT56 vessels provide the internal temperature in each vessel without the need for an optional sensor.
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A microwave-heating batch process accomplishes denitration of uranium nitrate solutions using controlled, uniform heating to complete the dehydration step prior to the commencement of the denitration step (Notz and Haas 1981; JAEA 2009). In this way, the formation of the
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Denitration of simulated high level liquid waste (HLLW) by formic acid was performed for the connection of Plutonium Uranium Recovery by EXtraction (PUREX) process with trialkyl phosphine oxide ...
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The temperature rise of the sample in microwave heating is estimated by using the following heat conduction equation (Zhang et al. 1994); (2.1) m C p ∂ T ∂ t = q …
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This process involves the single pot dissolution and denitration of rejected fuel pellets in HNO 3 (batch process) under a specified microwave power-temperature profile described in details ...
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This study aimed to treat real wastewater from the desulfuration and denitration process in a petrochemical plant with high-strength nitrogen (TN≈200 mg/L, > 90% nitrate), sulfate (2.7%) and extremely low-strength organics (COD Cr < 30 mg/L). Heterotrophic denitrification of multistage anoxic and oxic biofilm (MAOB) process in …
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In this paper, the denitration process was studied by depressing the pressure inside the vessel where the solution is denitrated. Intermediate and final products were characterized. It was demonstrated that when working pressure ranges between 520 and 970 hPa during denitration, high density UO 2 pellets can be obtained without …
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As a new type of progressive energy release propellant, nitro gradiently distributed propellant (NGDP) was prepared by a denitration reaction between a denitration reagent and the propellant to remove the energy-containing functional group (–O–NO2) from the surface of the propellant. The kinetics of the denitration reaction …
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Based on the successful development of the co-conversion process, the microwave heating direct denitration facility with a 10 kg MOX/d capacity has been constructed adjacent to the reprocessing plant.
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A 500-mL quartz flask containing 250 mL of the UO 2 (NO 3) 2 solution was placed in the chamber of a Samsung MW73VR microwave oven (radiation frequency …
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A novel process for reduction of (U3O8+PuO2) mixed oxide powders at a lower temperature has been developed. The low temperature microwave reduction (LTMR) was carried out at 550℃.
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