These precursors were dissolved in 75ml of deionized water in a beaker of 400ml capacity to make a homogeneous solution which was heated over a hot plate until ignition temperature is reached, once ignited the combustion proceeds automatically without requiring further external heating. The amounts of reactants were calculated based on the synthesis of 3g of final product following the equation (1). The experimental synthesis of Ni metal was carried out by using nickel nitrate and glycine precursors. 3.2 Experimental investigations for synthesizing transition metals using SCS method The following sections present the experimental synthesis Ni as an example displaying the possibility of synthesizing transition metals using SCS process. Some synthesis experiments were carried out to verify the above predictions. Fe, Zn etc.) to investigate the feasibility of their synthesis using SCS method. Similar calculations can be performed for other metals (e.g. These thermodynamic calculations indicate the possibility of synthesizing pure transition metals (Ni, Cu and Co) in their reduced states by SCS method. Predicted solid products distributions in SCS systems (a) Ni-nitrate glycine, (b) Cu-nitrate glycine, and (c) Co-nitrate glycine The optimum combustion temperature for Cu system could be at a φ value slightly more than 1 as there are multiple oxidation states of Cu (Cu(0), Cu(I) or Cu(II)) which could result in extra enthalpy exchange during reduction from higher oxidation state to a lower one.įigure 4. For φ 1 could result in an incomplete combustion as excess amount of reducing agent is present in the system. The maximum combustion temperature at φ = 1 is expected from scheme (1) as it gives the stoichiometric condition and optimum amount of fuel is present for complete combustion of the reactants. For Cu system the maximum temperature was 1922 at φ = 1.2 − 1.25. For Ni and Co systems the maximum temperature was 1954☌ and 1939☌ respectively at φ = 1. In all the three cases an optimum value of φ (φ = 1 − 1.25) is obtained giving maximum combustion temperature. Fig 2 shows the thermodynamically predicted adiabatic combustion temperature for the three metals investigated.
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