Advanced Materials Research Vols. 512-515

Abstract: By means of mechanical properties test and structure observation， the relationship among electric field strength, polar molecule type, content on the Ni/TiO₂ group electrorheological fluid properties have been analyzed. It is found that with increasing electric field strength，the properties of electrorheological fluid increased for same composition ER fluid. Different type polar molecules have distinct effect. For same particle，with increasing polar molecule content，the property is increased, but there is a critical value . Polar molecule make particles chain of electrorheological fluid become strong，coarse and interweaved each other.

Abstract: Physical and numerical models of the radiant ceiling cooling system were built and numerically simulated. The results showed that the lower the temperature of cooling water is, the lower surface temperature the ceiling has, and the bigger the cooling capacity is. The bigger the depth of tubes is, the higher the surface temperature and the smaller the cooling capacity. The differences are not evident. The bigger the distance of tubes is, the bigger the surface temperature is and the smaller the cooling capacity is. The diameter of tubes has a few influences on the surface temperature and the cooling capacity. Results in this paper can provide basis and guide for the design of the project, the selection of parameters and the feasibility of the system.

Abstract: This paper presents an investigation of the purification and activation of a raw diatomite by acid treatment. In the acid modification process, the SiO₂ gel powder was adsorbed partially into the pure diatomite, blocking macropores and large mesopores of diatomite, which resulted in great increase of the specific surface area and SiO₂ content of diatomite. Thus, the as-prepared diatomite has potential use in the fabrication of catalyst carrier.

Abstract: In this experiment, the micro-emulsified diesel oil is prepared by using alkanol amide from the reaction between oleic acid and ethanolamine and the mixture of them and with its by-products as the surfactant and alcohols with different carbon chain lengths and molecular structures as the co-surfactant. The experiment explores the effect of the proportion and dosage of the surfactant on the water solubilization, studies the influence of the category, construction and dosage of the co-surfactant on the water solubilization and its stability, and also discusses the impact of concentration of the electrolyte on the micro-emulsion. The experimental result shows that the no1-ionic surfactant can be used to prepare the W/O micro-emulsified diesel oil when this is satisfied: m (oleic acid): m (ethanol amine) =10:1 and that 1-pentanol, isoamyl alcohol, 1-hexanol, benzyl alcohol can all be used as its co-surfactant. The co-surfactant of benzyl alcohol or 1-pentanol helps to ensure its mechanical and temperature stability, and to prepare the micro-emulsified diesel oil with no1-ionic surfactant from the reaction between oleic acid and ethanolamine as surfactant, one of the best formulation should be like this: room temperature(20°C），ω（0 # diesel oil）=70.6%, ω（surfactant）=9.2%, ω（benzyl alcohol）=5.0%, ω（inorganic salt solution）=15.2%.

Abstract: Segmented block copolymers (PA1010-b-PEG) based on α,ω-dicarboxy-polyamide-1010 (PA1010dC, = 1000, 2000, 3000 and 5000) and α,ω-dihydroxy-polytetramethylene glycol (PEG, = 1000, 2000) were synthesized by melt condensation. Various block copolyamides with different block lengths of the hard and soft segments were obtained, and their composition and block lengths were determined via FT-IR and 1H-NMR.

Abstract: SnSO4 and TiOSO4 were chosen in this paper as the main salts for preparing composite chemical conversion coating on aluminum alloy. The scope of this paper is to find out the optimal experiment process, the performance of Ti-Sn composite chemical conversion coating and tentative to analysis the microstructure of this chemical conversion coating. The optimal conditions of the concentration ratio of TiOSO₄ and SnSO₄ was 0.4g/L, 0.4g/L, KMnO₄ 1.0g/L, NaF 1.0g/L, reaction temperature 50°C、reaction time was 3min. And then different methods were used to study the performance and microstructure of the conversion coating.

Abstract: The pyrolysis of Shenhua direction residue and Shenhua coal was investigated in a thermo gravimetric analyzer. The TG and DTG curve indicated that compared with coal, the residue has higher weight loss and weight loss rate due to the higher content of heavy oil and asphaltene which produced during the liquefaction process; The residue and coal were also investigated in a fixed bed reactor to determine the composition and the yield of the gaseous product evolved. The main gases were H₂, CH₄, CO, CO₂, C₂H₄ and C₂H₆, the residue has less gas produced because most of the active component in coal was destroyed during the liquefaction process, so the main component in residue is inactive substances. The maximum evolution temperature of CO, CO₂, C₂H₄ and C₂H₆ was about 500°C, which were related to the maximum weight loss rate temperature, in this temperature the decomposition rate of the coal macromolecular structure is largest.

Abstract: Hydrogenation of phenanthrene (PHE HYD) was investigated over a commercial NiW/Al₂O₃ catalyst under practical reaction conditions. GC-MS analysis was utilized to identify the numerous products formed during PHE HYD. The products included dihydrophenanthrene (DHP), 1,2,3,4-tetrahydrophenanthrene (THP), sym-octahydrophenanthrene (1,8-OHP), asym-octahydrophenanthrene (1,10-OHP) and perhydrophenanthrene (PHP), but the cracking products were not found under the reaction conditions. The effects of operating conditions such as temperature, pressure and H₂/liquor on PHE HYD were tested in detail. It is found that temperature and pressure had remarkable effect on PHE HYD, but volume ratio of H2/liquor had little effect on PHE HYD at the observation range. The addition of decalin had a positive impact on PHE HYD; it could increase the conversion of PHE and the selectivity to PHP.

Abstract: The performance and stability for FTS was studied on novel Fe1-xO-based iron catalyst (FIC) in agitated slurry reactor (ASR) and fixed bed reactor (FBR), and compared with precipitation-iron catalyst (PIC). The studied results indicate that novel Fe1-xO-based iron catalyst has the high conversion and high stability, especially, the high alkene selectivity in C2 ~ C4 products that the ratios of olefines and paraffines the more than 9 and the low cost, the preparation process and the high mechanical intensity. The catalyst can be used at FBR or ASR, and FTS at high temperature or low temperature.

Abstract: The simultaneous TG-DSC version of SENSYS EVO CALORIMETER is applied to the combustion characteristics test of coal, and obtains the TG - Heat Flow curve of meager lean coal, anthracite and blended coal of 75% meager lean coal and 25% anthracite, in the lower scanning rate .the curve and data analysis show that, compared with meager lean coal and anthracite, the blended coal has the lower ignition temperature, the higher weight loss ratio and heat flow. This means that blended coal with this components is more easily ignited, burning more sufficiently. In addition, although the proportion of mixed meager lean coal accounting for 3/4, but the combustion characteristics of blended coal relatively more close to anthracite’s.