Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : activated carbon

Simulation Study and Comparison Green Freeze Technology Utilizing with Theory of Different Adsorption Working Pairs of Solar Adsorption Refrigeration

Faiza Mahdi Hadi

Engineering and Technology Journal, 2012, Volume 30, Issue 3, Pages 84-97
DOI: 10.30684/etj.30.3.15

In this research a study of the theory of six different adsorption pairs to check
and choose the best adsorption pair in terms of adsorption capacity and the effect of
high and low temperature on it. It has been shown that the best adsorption pair at
the temperature 25oC is the activated carbon fiber with methanol (ACF +
CH3OH). Where the adsorption capacity is = 0.45 ACF x , followed by granules
of activated carbon with methanol (AC + CH3OH) and adsorption capacity is
= 0.3 AC x by more than half compared to a pair of activated carbon fibers. Then,
four adsorption pairs have been selected for solar adsorption ice maker system and
a couple for solar adsorption chiller system. The application of Excel has been used
to solve governing equations and mathematical model of thermal balance
simulation the largest amount of ice produced, the highest coefficient of
performance for all pairs adsorption mentioned at the best operational temperature,
it was found that the activated carbon fiber with methanol, the largest amount of
ice produced 2.55kg and the highest coefficient of performance of 0.38 in the
adsorption ice maker at operating temperature of generator is (110oC). The
Adsorption chiller for a couple, silica gel with water, the best in terms of impact
with the cooling effect and coefficient of performance of the highest at temperature
range of (64 -110oC).

Removal of SO2 in Dry Fluidized and Fixed Bed Reactors using Granular Activated Carbon

Neran K. Ibrahim; Omar A. Jabbar

Engineering and Technology Journal, 2011, Volume 29, Issue 14, Pages 3019-3037

Flue gas desulfurization process has been studied using granular activated carbon in bubbling fluidized bed reactor. For the sake of comparison, fixed bed configuration has been also studied at the same operating conditions. The effect of temperature 30 . T . 80 oC, inlet SO2 concentration 500 . Co . 2000 ppm, and flue gas flow rate 2.5 .
Q . 30 ./min were investigated. The results showed that the SO2 removal efficiency increases with increasing reaction temperature up to 80 oC. Also, it was noted that the removal efficiency decreases with increasing the inlet SO2 concentration within the range of temperatures studied. The effect of flue gas flow rate on the desulfurization
activity was in two ways; an increase in the removal efficiency with increasing gas flow rate was observed below flow rate = 7.5 ./min, while a decrease in the efficiency was observed upon any increment in the gas flow rate beyond the 7.5 ./min. The results of fluidized bed reactor were used to obtain an empirical correlation and the experimental results were well correlated with the proposed form
with a correlation coefficient, (R) =0.989. A reaction rate equation was proposed for the oxidative desulfurization and the activation energy was obtained using differential analysis of integral reactor technique. The resulted value of apparent activation energy was 2.981 kJ/mol.