Advanced Materials Research Vol. 852

Abstract: Charcoal slag that falls away from electrolytic aluminium carbon anode caused by selective oxygenization is recognizad as the principal factor of carbon anode excessive consumption in electrolyzation. In this paper, effect of aluminium powder upon calcined anthracite carbon anode CO₂ reactivity at 970°C was tested and measured to reduce carbon consumption. The result indicates that aluminium powder added to calcined anthracite carbon anode effectively reduced the CO₂ reactivity at 970°C. The experiment shows that the oxidizing level and deciduous level of carbon anode with 0.8wt.% aluminium powder additives is the lowest, which is 32.8% and 70% lower than that without additives individually, and the total consumption rate reduces to 39.28 mg·cm^-2·h^-1. It is considered that the inoxidizability increases with advancing the cokeability, increasing the graphitization degree and reducing the porosity of carbon anode through aluminium volume increasing and pitch thermolysis catalyzing in calcination.

Abstract: The TiO₂-activated carbon fiber (ACF) was successfully prepared by electrospinning and thermal treatment. The nanofiber was characterized by scanning electron microscopy (SEM), thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and Brunner-Emmett-Teller method (BET). The results showed that the average diameter of ACF was in the range 200-500 nm, and the preoxidation temperature and carbonation temperature were 250°C and 500°C, and the anatase TiO₂ appeared in fiber after carbonation, and TiO₂-ACF specific surface area was 1146.7 m²/g. The TiO₂-ACF was used for adsorption of low concentration SO₂. The results showed that the adsorption rate increased with an increase in SO₂ concentration, furthermore the adsorption rate increased with prolonged adsorption time, the high adsorption rate was 67.6% after 40 min. While temperature was below 60°C, the adsorption rate decreased as the temperature increased, however when temperature was above 60°C, there was a slight increase of adsorption rate as the temperature increased.

Abstract: In order to improve the thermostability of potassium chlorate particles, microencapsulation method was used to coat potassium chlorate particles. The effects of coating agents on thermostability of coated potassium chlorate particles were investigated by differential thermal analysis (DTA) and optical video microscope. An optimum study of preparation process parameters was carried out by orthogonal design. The results show that the Silane coupling agent kh550 is the most efficient coating agent to inhibit the decomposition of potassium chlorate and result in the improvement of potassium chlorate. The optimal process for the microencapsulation is 5%Silane coupling agent, reaction temperature 40°Cand holding for 3h.

Abstract: The reaction of copper 2,2-dichloroacetic acid and heterocyclic diimine (benz) ligands under mildconditions affords one supramolecular complexes, [Cu (bipy)₂[[H₂₂ (bipy=benz, X=dichloroacetic acid). The compounds involves a regular square based pyramidal one and were constituted through hydrogen bonding and ππ interactions between the heterocyclic rings.

Abstract: The dynamic recrystallization of commercially pure titanium was investigated by compression tests on Gleeble-1500D thermal simulation test machine at temperature of 700950 °C and strain rate of 0. 015 s¹. The total compression deformation is 0.7(true strain). The kinetics of dynamic recrystallization of commercially pure titanium at 950 °C was modeled by Avrami equation. The results show that the dynamic recovery and recrystallization obviously occur during compression. The flow stress increases to a peak value and gradually decreases to a steady state. The flow stress is decreased with the increase of deformation temperature and it is increased with the increase of strain rate. The Avrami kinetics model of dynamic recrystallization of commercially pure titanium at 950 °C is obtained .

Abstract: High alkali aluminosilicate glass batches were prepared by five different raw materials, reaction heat of which in melting process was studied by means of DSC thermal analysis method. The results show that reaction heat of batches in the heating process of 25-1600°C exists a significant difference, and which is among 4396.38 J/g-5311.14 J/g, moreover the least is the batches using petalite, while the most is spodumene. In the whole heating process, 380-800°C is carbonate decomposition stage, which accounts for 42-46% of the total absorbed heat; and 800-1200°C is silicate reaction stage, 40-50%; and 1200-1600°C is glass clarify and homogenization phase , 6%-16%. Therefore, carbonate decomposition and silicate reaction is the main part of batches heat consumption, the optimization scheme for materials has a significant effect on energy saving and emission reduction.

Abstract: In the present paper, we have introduced the preparation and classification of nanofluids. The factors that influence the viscosity of nanofluids and researches on the fundamental research to specific applications of nanorheology in controlled-release fragrance nanocapsules suspensions are discussed. Finally some problems exist in the research of nanorheology are summarized.

Abstract: This study aimed to optimize the process parameters for the ultrasonic spraying of a nanooptical film coating on a large-area glass substrate, using the Taguchi experimental design. The key process parameters affecting spraying performance include the speed of the spray nozzle, flow rate of spray solution, airflow strength, spray height, and spray distance. The Taguchi quality characteristic used was the uniformity of light transmittance. With a glass substrate area of 52 cm², the optimal process parameters for uniform spraying of silica solution were obtained via the Taguchi design method. The experiments confirmed that the optimal process parameters could effectively improve the uniformity of visible light transmittance; the S/N ratio of optical transmittance uniformity rose by approximately 2.79, transmittance reached 92.02%, and the transmittance uniformity was controllable to within 0.12%.

Abstract: Sulfur dioxide is a strong pungent odor and astringency of the colorless gas. The human being health will be threatened as the concentration of sulfur dioxide at atmosphere achieve-ups to 1.4 mg/m³. The technology of flue gas desulphurization will more and more be concerned because of "coal-fog" discharged onto the air in China. This paper demonstrated the latest research results of technology of flue gas desulphurization based on SO₂ controlled approaches which can be divided into three stages for combustion that are the prior, middle and later. The advantages and disadvantages of various methods were also described. The three techniques had been reviewed according to the needs and conditions of recovery, comprehensive utilization of sulfur resource. The research results show that the technique of desulphurization after combustion is a large-scale commercial application means to the control of SO₂ pollution around world.

Abstract: A novel ionic liquid 1,1,3,3-tetramethylguanidinium lactate (TMGL) has been prepared. And the stability of ionic liquid was determined at different temperatures and pressures, which shows extremely low vapor pressure and high thermal stability. TMGL was immobilized by adjusting the feed ratio (TMGL/SiO₂) and particle size, the concentration of 0.90% sulfur dioxide gas passed into a certain amount of the loaded ionic liquid TMGL-SiO₂, quickly reduced to less than 0.05%, the concentration was measured by a BRUKER Infra-red Spectrometer. This ionic liquid has potential applications in flue gas desulphuration (FGD).