Advanced Materials Research Vols. 512-515

Abstract: Through the example about the electrothermal boiler and heat storage system modification of Yuci cultural center of Shanxi Province, the paper introduces the design scheme and the characteristic of electrothermal boiler system, and compares the system operation cost with the central heating cost. It points out the technical advantages and economic value of the electrothermal heating boiler. above all, it has a very high environmental protection value.

Abstract: In order to reduce energy-consuming and environment pollution of traditional dyeing and finishing industry, a design and experimental method of electrostatic spray system for dyeing and finishing was proposed. With dyeing and finishing solution as experimental fluid, the size of the droplets was measured under different charging voltages. By changing experimental parameters such as fluid amount Q, air pressure and charging voltages U, the relationship between single-side moisture transporting effect and Q, U were analyzed. The research showed the single-side moisture transporting effect became better when Q was from 22L/H to 34L/H. Moreover, electrostatic force Fe was beneficial for single-side moisture transporting effect especially when adding geographic pole at the back of the fabric. A reasonable operation plan which met the dyeing and finishing effect was given，which exceeded traditional dyeing and finishing in efficiency, energy saving and environment protection.

Abstract: From the standpoint of offering reference for its optimal design, liquid-gas ejector is applied to absorption refrigerator in order to improve mass transfer efficiency. The experimental performance of ejector driven by aqueous LiBr solution was investigated. The experimental results indicate that the diffuser with larger diameter of throat could improve the system cooling capacity while reducing the volume of absorber; the larger diameter of the mixing chamber could improve the cooling capacity, but the extent of improvement is little and the required absorber volume per kW of cooling capacity greatly is increased.

Abstract: Taking the overlap of two weight loss peaks into consideration and separating them, the multiple-step model of PVC pyrolysis has been analysed by using Coat-Redfern method. It was found that pyrolysis of PVC consisted of three reactions, whose reaction models were all the second order. This method was proved accurate by comparison between simulation and experiment of TG curves. The mass spectrometry of evolved gases agreed well with the TG curves. Obviously, gases such as C₆H₆, HCl and C₂H₂ were released during PVC pyrolysis.

Abstract: The general information and features of supercritical unit are illustrated. By controlling the input air according to fuel, combustion efficiency can be ensured. By coordinating the input oxygen in proportion to the load, heat efficiencies and emissions can be accomplished. The detailed design of the control schemes is described. The effectiveness of the proposed schemes is illustrated through industrial application. It’s hoped that the analysis and optimization can provide useful experience and lessons for the design of the supercritical coal-fired unit’s controls.

Abstract: 3S separator can greatly reduce the temperature of nature gas and liquefied the gas. Parameters analysis is conducted based on a one-dimensional steady simulation model. The results not only show the prospective potential of 3S technology to be used in liquefaction of nature gas, but also the suitable working range and applicable parameters was given.

Abstract: 3S separator which has been widely employed in separation of gas mixtures can greatly reduce the temperature of natural gas when it expands in a Laval nozzle. The gas through the separator can not be totally liquefied due to the special working mechanism of the separator. A novel liquefaction process with a supersonic swirling separator is presented and simulated. The process can liquefy all the crude gas by re-cycling the gas which is not liquefied at the outlet of the separator. The simulations show it can get relatively high energy efficiency and could be competitive in many cases.

Abstract: Mg2-xNdxNi (x=0.1, 0.2, 0.3) alloys, along with Mg2Ni for comparison, were prepared by vacuum induction melting, The influent of content of Nd on the microstructure and hydrogen storage performance were studied, the hydrogenation mechanism of Mg2-xNdxNi alloys was explored. The results showed that: the hydriding-dehydriding kinetics performance of Mg2Ni were improved by adding Nd, but the hydrogen storage capacity of alloys decreased. Mg2Ni, Nd2Ni7, NdMg12, Nd5Mg41 and other minor phases were observed in Mg-Nd-Ni alloys. Mg-Nd-Ni alloys had favorable kinetics performance. Compared with Mg2Ni alloy, the desorption rate and desorption ratio decreased with the increase of the amount of Nd, the hydriding-dehydriding kinetics performance Mg1.9Nd0.1Ni was the best. The hydrogenation mechanism of Mg2-xNdxNi alloy was nucleation and grown up mechanism controlled by diffusion ([-ln(1-ξ)]n=kt), the nucleation and grown up process was decided by the diffusion of hydrogen atom in alloy. Hydrogenation rate increased with the increase of hydrogen pressure and adding Nd, it was because the diffusive rate of hydrogen atom in alloy increased. According to the analysis of kinetics mechanism, methods to improve kinetics performance was put forward by reducing the diffusion path of hydrogen atom in alloy.

Abstract: Y₂O₃-ZrO₂ support was prepared by two-step precipitation method with ammonia and oxalic acid. A series of Cu-Ni/Y₂O₃-ZrO₂ catalysts were prepared by impregnation method. The catalysts were investigated and then characterized by XRD and SEM results. The activity of catalysts in ethanol steam reforming was studied. The effects of the catalyst composition on the ethanol conversion rate were discussed and the catalysts inactivation phenomenon under the temperature ranging from 673K to 723K was then analyzed. The results show that 1Cu9Ni/1Y9Zr catalyst has higher activity in ethanol steam reforming, over which ethanol conversion rate is higher than 98% under the situation of 623K, while the inactivation of catalysts with Cu/Ni>3/7 at 673K~723K was caused by carbon deposition .

Abstract: 2-hydroxyl-3-sulfonic acid sodium salt-propyl lacrylate was synthesized through the three-step process (sulfonation, ring-closing reaction, and esterification) by using epichlorohydrin as the starting material. The structure of oxiranemethane sulfonic acid sodium salt and end product 2-hydroxyl-3-sulfonic acid sodium salt-propyl lacrylate was identified by FTIR and Melting point. The influence factors of the synthesis process were studied. The optimal condition of the synthesis of ring-closing reaction and esterification was gained. Through the synthesis method, a corresponding synthesis of lauric acid, 14 acid, palmitic acid, 18 acid were gained. Then they were on the surface tension tests to determine the critical micelle concentration.