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Journal of Hazardous Materials 185 (2011) 1609–1613
Contents lists available at ScienceDirect
Journal of Hazardous Materials
j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / j h a z m a t
Short communication
Sorption of SO2 and NO from simulated flue gas over rice husk ash
(RHA)/CaO/CeO2 sorbent: Evaluation of deactivation kinetic parameters
Irvan Dahlan a, Keat Teong Lee b, Azlina Harun Kamaruddin b, Abdul Rahman Mohamed b,∗
a School of Civil Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysiab School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia
a r t i c l e i n f o
Article history:
Received 22 June 2010Received in revised form 7 October 2010
Accepted 13 October 2010
Available online 20 October 2010
Keywords:
Rice husk ash (RHA)
Sorbent
SO2/NO sorption
Breakthrough curves
Deactivation kinetic model
a b s t r a c t
In this study, the kinetic parameters of rice husk ash (RHA)/CaO/CeO 2 sorbent for SO2 and NO sorptions
were investigated in a laboratory-scale stainless steelfixed-bed reactor. Dataexperiments were obtained
from our previous results and additional independent experiments were carried out at different condi-
tions. The initial sorption rate constant (k0) and deactivation rate constant (kd) for SO2/NO sorptions
were obtained from the nonlinearregression analysisof the experimental breakthrough datausing deac-
tivation kinetic model. Both the initial sorption rate constants and deactivation rate constants increased
with increasing temperature, except at operating temperature of 170 ◦C. The activation energy and fre-
quencyfactorfor theSO2 sorption were found to be 18.0 kJ/moland 7.37×105 cm3/(g min), respectively.
Whereasthe activation energyand frequencyfactor forthe NOsorption,wereestimated to be 5.64 kJ/mol
and 2.19×104 cm3/(g min), respectively. The deactivation kinetic model was found to give a very good
agreement with the experimental data of the SO2/NO sorptions.
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