Advanced Materials Research Vols. 616-618

Abstract: The widely use of the Internet has greatly expanded the materials supply channels of the renewable resources. Online recycling has become an important way of the renewable resources in China. . The distribution mode of urban renewable resources recycling based on the Internet and also its associated conditions was put forward after comparing the distributed transaction mode of the renewable resources between the traditional recycling and online recycling.

Abstract: As a renewable energy, shallow geothermal energy has received extensive concerns in China, and is regarded as an important means to relieve the pressure in energy supply, meet the greenhouse gas control obligations and establish a low-carbon economy system. In recent years, a series of policies and regulations for promoting the utilization of shallow geothermal energy has been issued. This paper firstly makes an analysis of the patterns and the growing trend of shallow geothermal energy utilization, and then establishes the analysis paradigms of the economic, environmental and social benefits of its utilization, taking Tianjin as a case. Finally, a policy system to promote the utilization of shallow geothermal energy is proposed.

Abstract: In order to better manage shellfish aquaculture, a fifty-year variability in shellfish production in Jiaozhou Bay was quantitatively simulated with the Modeling Approach to Resource economics decision-maKing in EcoaquaculTure (MARKET) which is a scenario-testing tool linking economic and ecological analyses. Four scenarios were defined to assess the model sensitivity to per capita income growth rate, price growth rate and maximum cultivation area. Results indicate that the MARKET model follows the expected trends regarding the economic theory. And the shellfish supply is limited by the maximum cultivation area in the long run. However, a lower demand does not imply a corresponding decrease in net profit. Although price growth can make up for a partial loss caused by the reduction of available cultivation area, the compensatory measure cannot guarantee the increasing net profits of farmers in the long term. The information provides important implications for aquaculture management in the context of resource decline.

Abstract: A quantitative analysis of input-output status and sustainable development status of agro-ecosystem in Fuyang City was conducted by using the method of ecological emergy analysis in this paper. The results showed that the ESI of agro-ecosystem in Fuyang city was 5.31 in 2010, comparing with its neighboring provinces and cities, the sustainable development ability of agricultural ecology of Fuyang City was in a middle level.

Abstract: The establishment of eco-industrial parks can not only reduce the costs of waste disposal and the purchase of raw materials, but also has a positive impact on both economy and environment. By setting Shanghai as an example, a model of the eco-industrial park was described and the design plan and operating procedures of the park were provided in this paper. Then the benefits of this park were discussed. It may bring about some practicable approaches for the development of China’s eco-industrial parks through a specific analysis as well as the presentation of an operating model.

Abstract: Bi-La composite oxide was prepared by thermal decomposition of molecular precursor of BiLa(dtpa)(NO₃)•3.5H₂O (dtpa=Diethylene triaminepentaacetic). The effect of calcinated temperature on structure was discussed by X-ray powder diffraction, scanning electron microscopy and UV-vis diffuse reflectance spectroscopy. The photocatalytic performance of samples prepared was discussed through the degradation of methyl orange. The results show that Bi-La composite oxide prepared at 500°C exhibits the best photocatalytic activity for the degradation of methyl orange (20mg/L) and the optimum amount of photocatalyst is 1.0 g/L.

Abstract: Knowledge is the most valuable asset of manufacturing enterprises. Their core competitiveness is improved only by strengthening the management of knowledge. Data mining is the most powerful tool which discovers knowledge from large amounts of data. Fault diagnose is one of earliest application domains of data mining. This paper introduces data mining models for manufacturing applications. By using text mining techniques, this paper introduces the application of concept description function, classification function, clustering function in fault diagnosis.

Abstract: One-dimensional nanostructured polypyrrole (PPy) nanofibers were electrospun using a solution of PPy/polyvinyl alcohol (PVA); and PVA was used as the carrier in order to improve processability of PPy. In order to improve the performance of nanofibers, PPy were chemically synthesized by using different dopants, such as toluene sulfonate (TSNa), dodecyl-benzene sulfonic acid sodium salt (DBSNa), dodecyl sulfonic acid sodium salt (DSNa) and di-(2-ethylhexyl) sulfosuccinate sodium salt (DEHS). The morphology, structure and electrical conductivity of the fabricated nanofibers was investigated using SEM, FTIR and four-probe method, respectively. The results show that the diameters of doped PPy/PVA nanofibers are in the range of 50-190 nm. The electrical conductivity of the obtained doped PPy/PVA nanofibers was about 161-222 S/cm. DEHS doped PPy can not only make the obtained PPy be soluble in some organic solvents, but also improve the electrical conductivity of nanofibers when it is compared with that of TSNa, DSNa, DBSNa as dopants.

Abstract: Chemical-looping combustion (CLC) has been proposed as an efficient and clean technology that could contribute to achieve carbon dioxide capture with negligible cost. The technology uses a metal oxide as oxygen carrier that indirectly transfer oxygen from air to fuels so as to oxidize the fuels. This paper presents a new inorganic membrane Fe-based oxygen carrier prepared by mixing Fe2O3 and coal ash with certain proportion of corn starch (10.0 wt.%, 20.0 wt.%, and 30.0 wt.%). The structure of the prepared oxygen carrier was characterized by scanning electron microscope (SEM) and an X-ray diffractometer (XRD). The activity of the prepared oxygen carrier was measured by performing thermogravimetric analyzer (TGA) experiments and Temperature programmed desorption (TPD) experiments. Results show that the inorganic membrane Fe-based oxygen carrier has higher reduction reactivity and stability than the conventional oxygen carrier.

Abstract: SnO₂ films were supplied on the surface of 304 stainless steel (304SS) by a sol–gel process followed by a hydrothermal post treatment. The measurements of XRD, SEM and water contact angles were carried out to characterize the as-prepared samples. The effect of hydrothermal post treatments in different media such as deionized (DI) water, HF solution and NaOH solution on the corrosion performances of the SnO₂ films in simulated proton exchange membrane fuel cells (PEMFC) environments was investigated by electrochemical impedance spectroscopy (EIS) and polarization measurements. The results suggested that the SnO₂ films via the hydrothermal post treatment in 0.3 M NaOH solution showed a highest corrosion resistance and could act as an optimal barrier layer to metallic bipolar plates in simulated PEMFC environments. It could be attributed that the hydrothermal post treatment in NaOH solution was beneficial to improve the compact structure and enhance the hydrophobic property of the SnO₂ films.