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Introducing about fuel cells
Production of press-materials from polymer waste: The press materials was prepared from the used polymer films (as PE, PP, PS, PVC ...). The technology of the production of granule was found. This study investigates the influence of the component ratio, the temperature, the processing time on the mechanical physico chemical properties of the prepared materials.
Study on agglomeration of urea and its treatment method: There are many anticaking agents for fertilizers but surface active agents are more common and effective. VHCKK-2000 is an anticaking agent for Urea, which is based on suface active agents and additions. It has been used in HaBac Nitrogent and Chemical Company smce 2002 after testing period. VHCKK-2000 agnet is more effective than URESOFT-150, one was used before.
Studying the protective mechanism of chromate coating on latong substrate by electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS): The protective mechanism of the chromate coating forming on brass has been investigated using Electrochemical Impedancce Spectroscopy (EIS) and X-Ray Photoelectron Spectroscopy (XPS). The EIS data have been obtained as a function of exposure time in airequilibrated 3.5% NaCl for varying times between 0 and 96 hours. The 3th time constante appears in the Bode Spectra with decreasing in corrosion rate reveals the presence of new inhibition film between chromate conversion coatings (CCC) and substrate. X-ray Photoelectron Spectra show the presence of Cr(III) and unreacted Cr(VI) in the CCC which decays with the exposure time in 3.5% NaCl . The results have been suggested that those hexavalent chromium species as active inhibiting one play the role of forming a new interface inhibition layer and repainting the film at defect sites.
Syntherizing detergent for removing BK petroleum residue based on the modified pine oil: The emission of polycyclic aromatic hydrocarbons(PAHs) and particulate matter(PM) from domestic cooking by coal was studied. Smoke samples, in both gas and particulate matter phases, were iso- kinetically collected using US.- EPA modified method 5 and analysed for 18 PAHs by GC/MS. PAHs detected were found to be present in both gas and PM phases of smoke at the cooking conditions except for benzo(b)fluoranthene, which was in vapour phase only. Emission factors of individual P AHs on fuel - weigh basis were determined. The gas phase of smoke contributed 70% of total 18 PAHs and 75% of 11 genotoxic PAHs in terms of emission factor, The emission factor, emission rate as well as concentration of the total PAHs were found to be 62.0mg/kg, 25.1mg/h and 40.1pg/Nm3 respectively, while the same parameters of 11 genotoxic PAHs were found to be' 26.9mg/kg,10.9mg/h and 17.0pg/Nm3.
Synthesis, studying structure of 2-amino-5-stiryl-1, 3, 4-oxadiazol from cinamaldehyde in the cinnamon essence: The synthesis of organic compounds containing nitrogen and starting from cinamaldehyde as semicarbazone and 2-amino -5-styryl -1,3,4-oxadiazole has been studied. The conditions for synthesis of 2-amino -5-styryl -1,3,4-oxadiazole from semicarbazone derivatives of cinamaldehyde have been investigated. Their structure has been confirmed by spectrsscopy methods.
The emission of polycyclic aromatic hydrocarbon with particulate matter from the coal-fired power plant in Vietnam: Integrated samples of particulate matter have been taken isokinetically from the flue gas of Bai Bang thermal coal-fired power plant using glass fibre filters. The samples have been Soxhlet extracted with CH2CI2 and analysed by high performance liquid chromatography with fluorescence detection (HPLC/FLD) and/or gas chromatography with mass spectrometer detection (GC/MS). Anthracene, benzo[a]anthacene, phenanthrene, fluoranthene, pyrene, chrysene and benzo[a]pyrene, have been all present on the particulate matter, and the quantification of the latter five have yielded concentrations of 12.1,6.3,4.8,3.0,0.20 ng/m3 at normal conditions, emission factors of 111,57,43,27,2 ng/kg coal, and emission rates of 2207, 1122,847, 535, 38 Jlg/h, respectively. The obtained concentrations, emission factors, as well as recoveries have been reduced with increased molecular weight of individual PAHs compounds.
The emission of polycylic aromatic hydrocarbons (PAHs) and particulate matter (PM) from domestic cooking by coal: The emission of polycyclic aromatic hydrocarbons(PAHs) and particulate matter(PM) from domestic cooking by coal was studied. Smoke samples, in both gas and particulate matter phases, were iso- kinetically collected using US.- EPA modified method 5 and analysed for 18 PAHs by GC/MS. PAHs detected were found to be present in both gas and PM phases of smoke at the cooking conditions except for benzo(b)fluoranthene, which was in vapour phase only. Emission factors of individual P AHs on fuel - weigh basis were determined. The gas phase of smoke contributed 70% of total 18 PAHs and 75% of 11 genotoxic PAHs in terms of emission factor, The emission factor, emission rate as well as concentration of the total PAHs were found to be 62.0mg/kg, 25.1mg/h and 40.1pg/Nm3 respectively, while the same parameters of 11 genotoxic PAHs were found to be' 26.9mg/kg,10.9mg/h and 17.0pg/Nm3.
The potential energy surfaces and its application in determining transition state: Transition state (TS) is one of the most important parts of potential energy surfaces (PES) in the theoretical researchs of reaction kinetics with quantum theory (as quantum chemistry, density functional theory,.. .). What are there kinds of TSs? How can they be determined? This article answers some aspects of these very interesting questions.