Preparation of some magnesium compounds as fuel additives

number: 
1489
English
department: 
Degree: 
Author: 
Salal Abdul Hadi Abdulla
Supervisor: 
Dr. Ayad Hamza Jassim
year: 
2006

     The successful burning of heavy  fuel in gas turbines depends on the additive to prevent hot corrosion of hot gas path components, to prevent vanadium hot corrosion in the turbine hot gas path, a minimum ratio of magnesium to vanadium is required. In this work a number of oil-soluble and oil dispersible inhibitors were prepared to give a variety of magnesium complexes of different metal content and oil – solubility, these include;

1- Magnesium carboxylate which include : magnesium laurate, magnesium  arachidate, magnesium palmitate, magnesium oleate,magnesium stearate, magnesium Cyclohexane carboxylate, magnesium benzoate, magnesium   cinnamate,   magnesium adipate,  magnesium   phthalate and magnesium terphthalate.

2-Magnesium sulfonate.

3- Water – Oil emulsion magnesium derivatvies. The emulsion were prepared following two routs;

a- by using sodium laural sulfonate as surfactant and magnesium chloride as magnesium salt.

b- by using magnesium salfonate as surfuctant and magnesium acetate as magnesium salt.The prepared complexes were charachtarized by their FTIR spectra and their melting points.The solubility testes show that the oleate complex of magnesium was found to have the highest oil solubility among the carboxylate derivatives.The metal analysis, using atomic absorption specrtroscopy, show the magnesium percent as followes :

Mg-arachidate < Mg-oleate < Mg-stearate < Mg-palmitate < Mg-laurate <  3.12%   3.52%    3.64%   4.17%     5.06% Mg-cinnamate   <  Mg-benzoate    <       Mg-Cyclohexane carboxylate    <   7.23%  8.39%    8.75%  Mg-phthalate   < Mg-terphthalate  < Mg-adipate    

      12.28%  12.33%  13.35 While the sulfonate derrivative had  (4.15 % Mg).The magnesium percent of the emulsion prepared by rout (a) was (8.5 %) and that of rout ( b ) was ( 13.5 % ).