Kinetics of trona sulfur dioxide reaction

Guldur, C
Dogu, G
Doğu, Timur
One of the most efficient methods of desulfurization of flue gases involves the reaction of SO2 with activated soda in a dry system. In this work, reactivities of activated soda produced from trona by direct calcination and by spray drying of trona solution were compared and a reaction mechanism was proposed. Due to the textural variations of the solid during the reaction and due to the increased significance of adsorption of SO2, at low temperatures, a two step reaction behavior was observed. Predictions from the deactivation model gave satisfactory agreement with the experimental data.


Kinetics of sodium bicarbonate decomposition
Hu, W; Smith , JM; Doğu, Timur; Doğu, Gülşen (Wiley, 1986-9)
A thermal gravimetric method was used to measure rates of decomposition of NAHCO3 particles. Such decomposition produces a highly porous Na2Co3 that reacts with SO2 rapidly and completely at moderate temperatures. Hence, NaHCO3 decomposition provides a reactant with attractive features for SO2 removal. The rapid rate of decomposition combined with the high heat effect prevented determining intrinsic rates by constant temperature runs when the temperature level was above 400 K. However, rising‐temperature ru...
Critical behaviour of ammonia near the melting point
Yurtseven, Hasan Hamit (2002-08-01)
This study gives our calculations for thermodynamic quantities, such as the isothermal cornpressibility k(T), thermal expansivity alphap and the specific heat C-P, as a function of temperature for solid ammonia near the melting point. Our calculations, which have been performed on the basis of an experimental study given in the literature, show that those thermodynamic quantities diver e near the melting point in ammonia. This is an indication that ammonia exhibits a critical transition as one approaches th...
Kinetic analysis of crude oils by a weighted mean activation energy approach
Kök, Mustafa Verşan (1997-01-01)
A weighted mean activation energy method was applied to describe the reactivity and combustibility of crude oils via simultaneous TG/DTG. Thermal experiments were conducted with a non-isothermal method at a heating rate of 10 degrees C min(-1) with excess air. Reaction rates increased progressively with increasing temperature. The rate data were fitted to an Arrhenius equation; the plots showed three distinct reaction regions. Weighted mean activation energies (E(wm)), of the crude oils were calculated and ...
Mechanism Studies on CVD of Boron Carbide from a Gas Mixture of BCl3, CH4, and H-2 in a Dual Impinging-jet Reactor
Karaman, Mustafa; Sezgi, Naime Aslı; Doğu, Timur; Ozbelge, Hilmi Onder (2009-03-01)
Nearly pure boron carbide free from impurities was produced on a tungsten substrate in a dual impinging-jet chemical vapor deposition reactor from a BCl3, CH4, and H-2 mixture. The Fourier Tran form Infrared (FTIR) analysis proved the formation Of reaction intermediate BHCl2, which is proposed to occur mainly in the gaseous boundary layer next to the substrate surface. Among a large number of reaction mechanisms proposed only the ones considering the molecular adsorption of boron carbide on the substrate su...
CVD of boron and dichloroborane formation in a hot-wire fiber growth reactor
Sezgi, Naime Aslı; Dogu, T; Ozbelge, HO (2001-11-01)
Chemical vapor deposition (CVD) of boron by hydrogen reduction of BCl, on a hot tungsten substrate was investigated in a parallel flow reactor. Effect of substrate temperature (1100-1250 degreesC) on the relative rates of formation of BHCl2 and boron was observed by the on-line analysis of the reactor effluent stream composition using an FT-IR spectrophotometer. It was concluded that BHCl2 was majorly formed in the gas phase within the thermal boundary layer adjacent to the substrate with possible contribut...
Citation Formats
C. Guldur, G. Dogu, and T. Doğu, “Kinetics of trona sulfur dioxide reaction,” CHEMICAL ENGINEERING AND PROCESSING, pp. 13–18, 2001, Accessed: 00, 2020. [Online]. Available: