نتایج جستجو برای: oxidative desulfurization ods
تعداد نتایج: 131969 فیلتر نتایج به سال:
In this study, the Zn/Al-TiO2 and Zn/Al-ZnO was successfully synthesized. The catalysts were characterized by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Scanning Electron Microscope—Energy Dispersive Spectroscopy (SEM-EDS). typical diffraction peaks of Zn/Al-LDH, TiO2, ZnO still appear in composites, indicating that composite preparation did not change form precursors. FTIR sp...
Business-intelligence queries often involve SQL functions and algebraic expressions. There can be clear semantic relationships between a column’s values and the values of a function over that column. A common property is monotonicity: as the column’s values ascend, so do the function’s values. This we call an order dependency (OD). Queries can be evaluated more efficiently when the query optimi...
BACKGROUND To elucidate the relationship between seven occupational dermatoses (ODs) and 20 types of work in Greece. METHODS This was a prevalence epidemiologic study of certain ODs among 4,000 workers employed in 20 types of enterprise, in 104 companies, in 2006-2012, using data from company medical records, questionnaires, occupational medical, and special examinations. The χ(2) test was ap...
Hydrogen peroxide as an oxidant agent was used for desulfurization of a petroleum hydrocarbon fraction (C10-C22) with boiling range of 175-375 ℃, (light fuel oil) in the presence of acetic acid as catalyst. The oxidation was performed in an ultrasonic bath. It is found that increasing the amount of hydrogen peroxide lead to increase the oxidation rate and so desulfurizatio...
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