Nickel and antimony doped tin dioxide (NATO) coated titanium electrodes are prepared and tested for electrochemical treatment of pentachlorophenol (PCP). The effect of nickel content on the electrochemical activity is...
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Nickel and antimony doped tin dioxide (NATO) coated titanium electrodes are prepared and tested for electrochemical treatment of pentachlorophenol (PCP). The effect of nickel content on the electrochemical activity is studied using PCP as target organic waste. The nickel content has an optimized value for the activity. The NATO is characterized and the relationship between activity and oxygen to tin atomic ratio is discussed.
The heat transfer enhancement of Longitudinal Vortex (LV) is a kind of technology with efficiency is high and resistance is low. The effective influence distance of LV is very important to extend this kind of technolo...
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The heat transfer enhancement of Longitudinal Vortex (LV) is a kind of technology with efficiency is high and resistance is low. The effective influence distance of LV is very important to extend this kind of technology in narrow rectangular channels under water medium. CFX10.0 is used to simulate this question, and three velocity components of water flow have been used to define the strength of LV. The results of this calculate method are compared with the experimental results of thermal infrared imager and phase doppler particle analyzer, and they are reasonable. In this paper range, the effective influence distance of LV is bigger than 33 times of Longitudinal Vortex Generators (LVGs) height.
The behavior of air bubbles rising in water and the bubble induced flow field are numerically studied using a three‐dimensional two‐way coupling algorithm based on Vortex‐In‐Cell method. A small vortex ring struct...
The behavior of air bubbles rising in water and the bubble induced flow field are numerically studied using a three‐dimensional two‐way coupling algorithm based on Vortex‐In‐Cell method. A small vortex ring structure is generated with the rising of bubbles and the small vortex ring structure is led by the rising bubble cluster at first. The bubbles are accelerated by the vortex ring structure, and the bubble distribution and the shape of the bubble cluster are transformed by the vortex ring structure at the same time.
There are two types of laying technologies of two pipelines in one ditch: laying two oil pipelines in one ditch and laying an oil pipeline with a gas pipeline in one ditch. Because of the Joule Thomson effect and the ...
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There are two types of laying technologies of two pipelines in one ditch: laying two oil pipelines in one ditch and laying an oil pipeline with a gas pipeline in one ditch. Because of the Joule Thomson effect and the differences of the pipeline diameter, the thermal impact of these two different types of laying technologies may be different. An unstructured-finite-volume numerical method was used to study the differences of the thermal impact between these two different types of laying technologies.
The performance of 3 types of energy utilization cycles including the organic Rankine cycle, the single stage static hydrogen compression cycle, and the new multistage continuous hydrogen compression cycle were analyz...
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The performance of 3 types of energy utilization cycles including the organic Rankine cycle, the single stage static hydrogen compression cycle, and the new multistage continuous hydrogen compression cycle were analyzed. A multi-element valued model was used to evaluate the performance holistically, and the result showed that the integrated superiority achieved 0.721, which indicated the continuous hydrogen compression cycle is considered the best option among the typical compression energy utilization cycles and deserves thorough studying.
The isomerization of endo-tetrahydrodicyclopentadiene (THDCPD) to exo-THDCPD over AlCl 3 catalyst has been studied in a batch reactor. The effects of temperature, catalyst loading, and the type and amount of solvent ...
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The isomerization of endo-tetrahydrodicyclopentadiene (THDCPD) to exo-THDCPD over AlCl 3 catalyst has been studied in a batch reactor. The effects of temperature, catalyst loading, and the type and amount of solvent on the isomerization rate were investigated. Under the conditions of removing both internal and external diffusion effects, a kinetic model was established and the model parameters were developed. The results showed that the endo- to exo- isomerization of THDCPD can be treated as a first-order reaction. The activation energy E 0 and pre-exponential factor obtained from Arrhenius plot are 116 kJ I mol and 3.39x10 13 respectively. The simulation results agreed well with the experimental data.
An effective way to boost natural gas production from low pressure gas field was introduced in the paper. The supersonic ejector used the energy of high pressure gas wells, which was generally wasted through the choke...
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An effective way to boost natural gas production from low pressure gas field was introduced in the paper. The supersonic ejector used the energy of high pressure gas wells, which was generally wasted through the choke valve, as its power supply to boost the low pressure gas production. The field experiment of the natural gas ejector was carried out, and the performance of the ejector was also presented. Moreover, the production of low pressure natural gas well was compared when the natural gas ejector was used or not. The economic analysis shows that the recovery period of the capital was less than several months.
Experimental investigation was conducted on the cooling tower test device using the outlet water temperature as evaluation index. The experimental results indicated that: the outlet water temperature decreased with th...
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Experimental investigation was conducted on the cooling tower test device using the outlet water temperature as evaluation index. The experimental results indicated that: the outlet water temperature decreased with the increase of air-to-water ratio, but the trend was decreasing gradually. The limit air-to-water ratio existed during the decrease of outlet water temperature. The outlet water temperature had little change when the air-to-water ratio was up to this value. The limit air-to-water ratio decreased with the increase of inlet air dry bulb temperature and wet bulb temperature, and increased with the increase of inlet water temperature. And the limit air-to-water ratio decreased with the increase of the flow rate of circulating water. Such conclusions may be advantageously used in guiding the design and operation of cooling tower.
The viscous and pressure gradient terms, which can be solved by Green Function method theoretically, are calculated separately in MPS method. Through the analysis of kernel function, an accuracy condition of viscous t...
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The viscous and pressure gradient terms, which can be solved by Green Function method theoretically, are calculated separately in MPS method. Through the analysis of kernel function, an accuracy condition of viscous term is proposed and the reasonable match between spatial and time step will increase the accuracy and stability of MPS method. Poiseuille flow is simulated and the accuracy condition is validated. In the analysis of the source term of Pressure Poisson equation, the particle number density (PND), which is very sensitive to the relative configuration of particles, yields the deviation of velocity profile from the theoretical solution. It is the fluctuation in PND that causes the spurious fluctuation of pressure.
The heat exchange tube with inner and outer fins has been widely applied in industry in order to enhance the performance of heat exchangers. When it is used in high temperature environment, the security must be consid...
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