The Experts below are selected from a list of 220959 Experts worldwide ranked by ideXlab platform
Wu Jin - One of the best experts on this subject based on the ideXlab platform.
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A new structure of static Water Removal for proton exchange membrane fuel cell
Chinese Journal of Power Sources, 2002Co-Authors: Wu JinAbstract:A new structure of static Water Removal for proton exchange membrane fuel cell (PEMFC) was designed. Compared with common dynamic Water Removal methods, the new structure does not need additional humidification section,and can realize "zero emission" when operated with pure hydrogen and pure oxygen. It is suitable for space and underWater application. The effect of cell temperature and medium pressure on the performance of PEMFC with the new static Water Removal structure under different operating conditions was examined by experiment, and the 300 h cycle life test was carried out. The results show that PEMFC with the new sturcture runs stably and reliably.
Osamu Takai - One of the best experts on this subject based on the ideXlab platform.
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Application of a hydrogen reference electrode to a solid state Water Removal device
Journal of Applied Electrochemistry, 2000Co-Authors: Shiro Yamauchi, K. Mitsuda, H. Maeda, Osamu TakaiAbstract:An electrolytic Water Removal device using a solid polymer electrolyte membrane has been developed for controlling the humidity in the atmosphere of electrical control boxes. The device consists of a solid polymer electrolyte and thin film electrodes. The anode side of the device shows a dehumidifying effect while the cathode side shows a humidifying effect. This paper reports the evaluation and separation of the anode and cathode potentials by installing a gas port as a reversible hydrogen reference electrode attached to the Water Removal device. The polarization curves show that the anode potential remained stable at 2 V vs RHE, while the cathode potential changed significantly.
Shiro Yamauchi - One of the best experts on this subject based on the ideXlab platform.
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Application of a hydrogen reference electrode to a solid state Water Removal device
Journal of Applied Electrochemistry, 2000Co-Authors: Shiro Yamauchi, K. Mitsuda, H. Maeda, Osamu TakaiAbstract:An electrolytic Water Removal device using a solid polymer electrolyte membrane has been developed for controlling the humidity in the atmosphere of electrical control boxes. The device consists of a solid polymer electrolyte and thin film electrodes. The anode side of the device shows a dehumidifying effect while the cathode side shows a humidifying effect. This paper reports the evaluation and separation of the anode and cathode potentials by installing a gas port as a reversible hydrogen reference electrode attached to the Water Removal device. The polarization curves show that the anode potential remained stable at 2 V vs RHE, while the cathode potential changed significantly.
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Humidity control for display cases in museums using a solid-state Water Removal device
1999Co-Authors: Shiro Yamauchi, Tomiyasu Ohya, Eiko Sakayori, Sayaka Koubayasi, Yosiharu Takeushi, Takeaki Hanada, Sadatoshi MiuraAbstract:Humidity control for display cases in museums is important in the control of deterioration processes such as metal corrosion, and generally for the maintenance of high quality conditions for works of art. We have developed a novel device for controlling the humidity in display cases: an electrolytic Water Removal device using a solid polymer electrolyte (SPE) membrane cell. We applied this Water Removal device to experimental display cases and confirmed its humidity control abilities. We have found that this Water Removal device can provide both rapid and precise humidity control.
Elham Yasari - One of the best experts on this subject based on the ideXlab platform.
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Theoretical investigation of ethane oxidative dehydrogenation over MoVTeNbO catalyst in fixed-bed reactors with intermediate Water Removal
Chemical Engineering Research and Design, 2019Co-Authors: Armin Fazlinezhad, Ali Naeimi, Elham YasariAbstract:Abstract Oxidative dehydrogenation of ethane (ODHE) is a promising method for ethylene production. In comparison with the conventional methods which need high quantities of heat and also release considerable amount of COx, ODHE is more favorable in terms of energy and environment. This article presents an investigation on Water Removal effects on the performance of a multi-tubular fixed bed reactor over MoVTeNbO catalyst. Its performance is analyzed in terms of ethylene and COx selectivities and productions. Results show that ethylene and COx selectivities can reach from 87% and 19% to 91% and 12% respectively, which leads to 20% increase in ethylene and 28% reduction in COx productions. Also, it was shown that reactor temperature is reduced with Water Removal and its hotspot decreased from 500 °C to 460 °C that provides more controllable condition. Furthermore, a 20-bed mode membrane-like reactor is investigated for more Water Removal which results more than 94% ethylene selectivity. According to the results membrane reactor can be a proper choice for ODHE process with Water Removal.
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Improved dynamic performance of a thermally efficient reactor through Water Removal and defining new objective functions
Fuel Processing Technology, 2019Co-Authors: Elham YasariAbstract:Abstract Given the competitive effect of Water on DME productivity, paraffin formation and catalyst deactivation rate, a steady state investigation of Water effect will be insufficient. Besides, temperature plays an important role in catalyst lifetime and formation of by-products in the direct synthesis of dimethyl ether. The main purpose of this study is to conduct a steady state and dynamic analysis of two opposite effects of the formatted Water on the performance and temperature profiles of the two types of reactors. These opposite effects include 1- unfavourable attenuation of methanol synthesis, and 2- favourable attenuation of catalyst deactivation. In this respect, a multi-objective optimization problem with two new objective functions that offer a trade-off is proposed: maximization of the DME production rate and minimization of the slope of catalyst deactivation rate at time zero by optimizing the inlet, shell temperature and average Water Removal percentage. The behaviour of two types of reactors, a conventional shell-and-tube reactor and a thermally efficient shell and double tube reactor with/without inter stage Water Removal, are investigated. The steady-state and dynamic one-dimensional pseudo homogenous models are developed to solve mass, energy and momentum equations in order to investigate the steady state and dynamic behaviour of reactors. It is shown that although higher average Water Removal percentage would lead to increased DME production, it also leads to escalated catalyst deactivation rate, paraffin and hot spot inside the reactors. Moreover, the thermally efficient double-shell and tube reactor with intermediate Water Removal is shown to be superior to the conventional shell-and-tube reactor, yielding better temperature control (hot spot and temperature runaway) and higher DME productivity due to enhanced DME selectivity.
Inmaculada Ortiz - One of the best experts on this subject based on the ideXlab platform.
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Membrane Reactors for in Situ Water Removal: A Review of Applications
Industrial & Engineering Chemistry Research, 2013Co-Authors: Nazely Diban, Andrés T. Aguayo, Javier Bilbao, Ane Urtiaga, Inmaculada OrtizAbstract:This paper reviews the investigated applications of membrane reactors for in situ Water Removal during catalytic reactions in the food, pharmaceutical, cosmetics, and petrochemical sectors. The glo...
