Applied Mechanics and Materials Vols. 477-478

Abstract: The CeO₂ is prepared directly from bastnaesite as raw material that originated in Dechang, Sichuan province, China. Fully mixed with sodium bicarbonate (NaHCO₃) and roasted at 550 °C, the rare earth element (REE) in bastnaesite transformed into rare earth oxide. And the CeO₂ will be obtained by removing NaF through water washing and leaching the impurity elements including La, Fe, Al, Ca, etc. via hydrochloric acid (HCl). The CeO₂ was characterized by X-ray diffraction (XRD) and X-ray fluorescence (XRF). The XRF results demonstrated that the content of CeO₂ could reach more than 70% in products which can be used as polishing material.

Abstract: Introduce content and result of Study on the performance of filtration by Shangdong ceramic media ,and do comparison experiments with general quartz sand , The result shows that it is of low operation cost,high filtration efficiency and good water quality.

Abstract: The U-bending process of aluminum foam sandwich (AFS) is investigated, and a punch bending test is carried out in this paper. We discussed the bending deformation mode and generated the load & stroke curve of AFS panel by experiments. Macroscopic and microscopic punch forming mechanisms of AFS panels are analyzed by testing experiments and plasticity theory. We study the major deformation defects of AFS forming such as the delamination between the panel and the foam core, the excessive thinning of panels in the round corner, and shear stress cracks of the foam core. A conclusion is drawn on the panels variable blank holder force (VBHF) and the striking block control on the round corner, which would promote the forming technology of AFS.

Abstract: Based on pretreatment of Cornus wilsoniana vegetable oil,and adopting the method of high temperature catalytic cracking to preparating of rich hydrocarbon bio-diesel. Cornus Wilsoniana vegetable oil was as the raw oil,the process of high temperature catalytic cracking was dwascussed,by the catalyst types and percentage, heating current and the influence of reaction time.The more ideal response condition was:The best catalyst was KF/CaO (40%,roast 4 h); The best catalyst percentage was 0.1%;the best heating current was 3.2 A; The best reaction time was 40 min;The yield of liquid was 82%;The response rate was 92%. The preparation of bio-diesel was similar to 0 # diesel.

Abstract: In this study, catalytic cracking of Cornus wisoniana oil to liquid bio-fuel oil using KF/CaO as a solid base catalyst was studied. The catalyst characteristic by SEM, XRD, CO₂-TPD was proposed and the separate effects of impregnation ratio, calcination temperature and calcination time were investigated. This paper also studied the separate influence of mass of catalyst and reaction time on catalytic cracking of Cornus wisoniana oil. The experimental results showed that a 41.7% impregnation ratio, 630°C calcination temperature, and 4h reaction time can obtain option catalyst. When addition of 0.1% KF/CaO catalyst and 35min reaction time gave the best results, and the liquid oil yield exceeded 82.7%. The catalyst basicity was not too high, formed flake porous layer structure.* Corresponding authors:Changzhu Li (lichangzhu2013@aliyun.com)

Abstract: Within range of temperature from 15°C to 45°C,the solubility of 2,4-D acid in binary solvent formed from different ratio of ethanol and water are measured using equilibrium method.The results of experiment indicate that the solubilities of 2,4-D increase with the incresing temperature and the ratio of ethanol in mixed solvent.The solubility data are correlated with polynomial equation and semi-empirical equation.It shows the correlation with polynomial equation is better than with semi-empirical equation.

Abstract: In our Research, we Used Cornus Wisoniana oil as Feedstock and the High Temperature Pyrolysis Kettle as the Reactor. Examine the Performance of Lanthanum Oxide, Zirconium Sulfate, Calcium Oxide and KF Loaded Catalyst on Cornus Wisoniana oil Catalytic Cracking Reaction. and through the SEM, XRD and FT-IR, Optimal Catalysts were Used to Characterize the Structure. the Results Showed that among KF Modified Catalyst KF Supported on Cao Produced Highest Yield of Bio-Fuel Oil from Cornus Wisoniana oil. when the Dosage of Catalyst Reached 1%, KF Impregnation Ratio of 40%, and Catalyst Calcination for 4h at 600°C, it can be Obtained Highest Yield of Bio-Fuel Oil about 82.7% and Reaction Rate up to 94.1. in Addition to the KF/MgO Having Low Yield about 60.6%, Catalytic Activity of other Four KF Catalysts were Higher than that of Lanthanum Oxide, Zirconium Sulfate and Calcium Oxide. the Catalytic Efficiency of Lanthanum Oxide and Zirconium Sulfate Appeared Similarity and are all Low. the Catalytic Activity of Calcium Oxide is Slightly Higher than the Lanthanum Oxide and Zirconium Sulfate, but Lower than that of KF/CaO Catalyst.

Abstract: Magnetic cards are widely used as credit cards, gift cards and VIP cards. In many industries, the principal method for producing the magnetic stripe still employs magnetic tapes. Therefore, if magnetic inks could be printed directly on the poly (vinyl chloride) (PVC) cards, then there would be the potential to improve industrial efficiency significantly. In order to apply the magnetic inks to the credit cards or other PVC cards, the Screen printing technique was chosen as a suitable printing method.In formulation 19, it is easy to mix and disperse the iron oxide powders in binder, few agglomerates and agglomerates occurred in the dispersion and also the film thickness of this formulation is around 20 microns which is ideal for the magnetic stripe.

Abstract: Lignin was gasified in supercritical water (SCW) with Ru/C, Pt/C, Pd/C and Ni/Al₂O₃-SiO₂. The results indicated that the gasification yield (GY) and carbon yield (CY) were dramatically improved by four nano noble metal catalysts, especially with Ru/C, which doubled the GY and CY. The reason might be that catalysts can reduce lignin and help opening-ring, which lead to efficient gasification of lignin in SCW, but further research is necessary. Four catalysts have some different selectivity to different gases, but gaseous compositions are still similar as catalysis can’t change the reactions equilibrium.

Abstract: The highly intergrown NaA zeolite membranes on seeded ZrO₂ substrate were synthesized by microwave heating method. The preparation of seeds with the size of ca.60nm employed the vapor phase transformation method (VPT). The XRD patterns indicated that the pure NaA zeolite membranes formed on the seeded ZrO₂ substrate for varied synthesis times. However, the peak intensity of NaA zeolite membrane after 50min obviously decreased, suggesting that the NaA membrane could take place the dissolution at that time. The SEM images indicated that the NaA zeolite membranes for 15-30min had a good integrity and consisted of highly intergrown zeolite crystals, but the NaA membrane after 50min appeared some large defects, further verifying the result of XRD pattern. The gas permeability showed that the H₂/N₂ and H₂/C₃H₈ permselectivities on zeolite membrane attained 4.01 and 8.13, respectively, higher than those of the corresponding Knudsen diffusion. These results suggested that the diffusion of gases, at least in part, are affected by the pore size of zeolite and the function of molecular sieving can be embodied on the synthesized membrane.