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Cai X.,Tianjin University | Li Y.,Tianjin University | Li Y.,Guangdong Electric Power Design Institute | Guo J.,Tianjin University | And 3 more authors.
Chemical Engineering Journal | Year: 2014

A Ti-Mn hybrid oxide (Ti-Mn-HO) that simultaneously contained anatase-TiO2 and Mn3O4 was prepared and applied to arsenite photocatalytic oxidization (PCO) under UV irradiation. X-ray diffraction (XRD), scanning electron microscopy with an energy dispersive spectrometer (SEM/EDS), transmission electron microscopy (TEM) and a N2 adsorption-desorption method were employed to characterize the morphology of the catalyst. Kinetics experiments indicated that Mn3O4 promoted the PCO-adsorption process of arsenite [As(III)] better than either pure anatase-TiO2 under UV irradiation or Ti-Mn-HO without UV exposure. The cause of this phenomenon was investigated using Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Finally, a synergistic effect for the transformation of photoproduct holes and electrons between the TiO2 and Mn3O4 phases is assumed. © 2014 Elsevier B.V. Source


Zhan H.-A.,Handan Purification Equipment Research Institute | Zheng H.-Y.,Handan Purification Equipment Research Institute | Zhao W.-Z.,Handan Purification Equipment Research Institute | Wang Y.-C.,Handan Purification Equipment Research Institute
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2010

The influence of HGMS on density, mechanical property, technological property and ablated property of silicone rubber inhibitor were investigated. The results showed that HGMS can reduce the density of the material, and impact the mechanical property severely. Surface treatment of HGMS not only reduced the influence to viscosity of rubber, but also improved the reinforcement capacity of HGMS. When use alone, the ablation rate of the materials increased quickly. After 10 portions of fumed silica added, with the increase of HGMS content the ablation rate of the materials increased slightly and then decreased rapidly. Source


Liu S.,Handan Purification Equipment Research Institute | Qiu X.,Handan Purification Equipment Research Institute | Li J.,Handan Purification Equipment Research Institute | Hu X.,Handan Purification Equipment Research Institute | Guo J.,Handan Purification Equipment Research Institute
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014

The test facility of 2-D supersonic-supersonic ejector was constructed. Varieties of tests were carried out to investigate the starting and load characteristics of a second throat ejector. The schlieren photographs of the mixing chamber flow field were got by schlieren apparatus synchronously. The experimental results show that there are shocks brought by background pressure in mixing chamber fore part while the ejector starts critically. It is possible that the main shocks originate from the mixing chamber rearward while the ejector starts completely. Secondary flow has booster action for ejector starting which can make shocks to move backward in evidence. As the secondary flow is injected, the mixing layer between primary and secondary flow will occur obviously. If the pressures of primary and secondary flow are not matched, a strong oblique shock wave will be formed at nozzle exit inwall, which will be reflected between the wall and mixing layer, then the capability of primary flow will be reduced. Source


Qiu X.,Handan Purification Equipment Research Institute | Liu S.,Handan Purification Equipment Research Institute | Guo J.,Handan Purification Equipment Research Institute | Liu Q.,Handan Purification Equipment Research Institute | Hu X.,Handan Purification Equipment Research Institute
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014

In order to improve the efficiency of the pressure recovery system (PRS) of high energy chemical laser, a high-fin heat exchanger was designed and manufactured. Instead of the common non-integral finned tubes, copper tubes with integral screwed high fins were adopted. The copper tubes were in staggered arrangement and were forced water-cooled. The heat exchanger was integrated in a chemical laser system and was then tested. Comparative analysis was performed to the efficiency of PRS with and without heat exchanger. The flow resistance of heat exchanger is found to decrease when background pressure increases from 4.03 kPa to 9.366 kPa. When background pressure is 9.366 kPa, flow resistance is 0.133 kPa, which only accounts for 1.4% of the pressure at heat exchanger entrance. Compared with that of PRS without heat exchanger, the pressure at the mixing chamber entrance of PRS with heat exchanger decreases 12.95%, which suggests that the efficiency of PRS is improved with the help of heat exchanger. Source

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