نتایج جستجو برای: isoconversional methods
تعداد نتایج: 1874444 فیلتر نتایج به سال:
Aluminosilicate gel precursor having mullite composition was synthesized from inorganic salts of aluminum and silicon by employing the sol-gel method. Chemical analysis, surface area and bulk density measurements were performed to characterize the dried gel. The course of the mullitization was examined by FT-IR analysis which confirmed the diphasic nature of the gel. ...
there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
The kinetics of mercury removal from solid wastes generated by chlor-alkali plants were studied. The reaction order and model-free method with an isoconversional approach were used to estimate the kinetic parameters and reaction mechanism that apply to the thermal decomposition of hazardous mercury wastes. As a first approach to the understanding of thermal decomposition for this type of system...
Abstract The thermal decomposition behavior of polyacrylate pressure-sensitive adhesive (PSA) at heating rates 4, 6, 8, and 10 K·min ?1 was measured by thermogravimetric analysis (TGA). kinetic parameters for reaction the were obtained from TG profile differential method integral (Kissinger, general integral, MacCallum–Tanner, Šatava–Šesták, Agrawal, Flynn–Wall–Ozawa), results show that main st...
Esta investigación caracteriza la cinética de pirólisis del esquisto bituminoso con potencial en petróleo no convencional Cuenca Lancones (Perú). Se aplica termogravimetrÃa un medio inerte (nitrógeno) usando tres velocidades calentamiento (β=5, 10, 20 °C/min) amplio intervalo temperaturas (25 a 800 °C). El triplete cinético se determina el método isoconversional Kissinger-Akahira-Su...
Cellulose is the most abundant component of biomass and one that requires activation energy (Ea) for pyrolysis. In this study, dependence Ea on intrinsic cellulose characteristics, such as degree polymerization (DP), crystallinity, crystal size, was studied in different samples, including samples from Eucalyptus globulus, Ulmus minor, Linun usitatissimum, Olea europaea, Robinia pseudoacacia, Po...
Functional features of Ni-W composite materials combined with successful performance enabled a breakthrough in their broad application. To disclose the formation pathway at extreme conditions combustion synthesis NiO-WO3-Mg-C and NiWO4-Mg-C systems for optimization procedure, process was modeled under programmed linear heating by thermal analysis methods. The reduction kinetics tungsten nickel ...
Abstract Biocopolymers based on vanillin/fufurylamine–biobenzoxazine (V-fa) and epoxide castor oil (ECO), a bioepoxy, were prepared for application as dental fiber-reinforced composite post. The mechanical thermal properties of the V-fa/ECO biocopolymers assessed with regard to influence ECO content. addition at an amount 20% by weight into poly(V-fa) preserved stiffness, glass transition tempe...
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