Dynamic analysis of changes in diffusion and sorption parameters in the reaction of SO2with activated soda ash

Date

1988-8

Author

Doǧu, Gülsen
Keskin, Alne
Doǧu, Timur

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

149
views

0
downloads

Variations in pore structure cause significant changes in diffusion resistance and adsorption characteristics during the reaction of SO2 with activated soda. Breakthrough and moment analysis of the SO2‐activated soda ash reaction showed that the effective diffusion coefficient of SO2 in the solid product (mostly Na2SO3) was about three times smaller than its value in the original activated soda. About 30% of the diffusion flux of SO2 in the solid product was found to be due to surface diffusion. The adsorption equilibrium constant of SO2 on the solid product was found to be about half the value of the adsorption equilibrium constant on activated soda. It was also determined that SO2 was irreversibly adsorbed on the solid product Na2SO3 at 200°C and 3.7 atm. The gaseous product CO2 was not adsorbed on the solid product while it was slightly adsorbed on activated soda.

Subject Keywords

General Chemical Engineering

URI

https://hdl.handle.net/11511/51905

Journal

The Canadian Journal of Chemical Engineering

DOI

https://doi.org/10.1002/cjce.5450660411

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Dynamic and steady-state analysis of oxidative dehydrogenation of ethane Karamullaoğlu, Gülsün; Doğu, Timur; Department of Chemical Engineering (2005) In this research, oxidative dehydrogenation of ethane to ethylene was studied over Cr-O and Cr-V-O mixed oxide catalysts through steady-state and dynamic experiments. The catalysts were prepared by the complexation method. By XRD, presence of Cr2O3 phase in Cr-O; and the small Cr2O3 and V2O4 phases of Cr-V-O were revealed. In H2-TPR, both catalysts showed reduction behaviour. From XPS the likely presence of Cr+6 on fresh Cr-O was found. On Cr-V-O, the possible reduction of V+5 and Cr+6 forms of the fresh sa...
Dynamic analysis of adsorption equilibrium and rate parameters of reactants and products in MTBE, ETBE and TAME production Oktar, N; Murtezaoglu, K; Doğu, Timur; Dogu, G (Wiley, 1999-04-01) Adsorption equilibrium constants of ethanol, methanol, isobutylene, isoamylenes (2M2B, 2M1B), MTBE and TAME on Amberlyst 15 catalyst were evaluated from the packed bed moment technique. Adsorption equilibrium constants of alcohols were found to be two orders of magnitude greater than the adsorption equilibrium constants of i-olefins and the corresponding tertiary ethers. However, their apparent heat of adsorption values are quite low (-6,7 kJ/mol and -8.3 kJ/mol for methanol and ethanol, respectively). Amon...
DEPENDENCY OF NANOFLUID RHEOLOGY ON PARTICLE SIZE AND CONCENTRATION OF VARIOUS METAL OXIDE NANOPARTICLES YAPICI, Kerim; Osturk, Ozge; Uludağ, Yusuf (FapUNIFESP (SciELO), 2018-04-01) Impact of the nanoparticle size and concentration on the rheology of ethylene glycol based nanofluids containing nanoparticles of five different metal oxides is investigated. Particle mass concentrations ranged from 5 to 20 wt %. Types of the nanoparticles and their particle size are TiO2 (30 nm, 50 nm), MgO (20 nm, 40 nm), ZnO (10-30 nm, 35-45 nm, 80-200 nm), SiO2 (20-30 nm, 60-70 nm) and CuO (40 nm, 80 nm). A stress controlled rheometer fitted with a cone-and-plate system is employed for the rheological c...
Monitoring of liquid sprayed conical spouted beds by recurrence plots Savari, Chiya; Külah, Görkem; KÖKSAL, MURAT; Sotudeh-Gharebagh, Rahmat; Zarghami, Reza; Mostoufi, Navid (Elsevier BV, 2017-07-01) In this study, the chaotic behavior of gas-solid flow in a laboratory scale conical spouted bed during spraying of water on the sugar particles was investigated using non-linear analyses of pressure fluctuations (PFs) and acoustic emission (AE) signals. The phase space trajectories, recurrence plots (RP) and recurrence quantification analyses (RQA), as powerful non-linear techniques, were used for monitoring of the bed hydrodynamics. It was concluded that the reconstructed phase space trajectories of both P...
Study of Sorption of Alcohols on High Silica ZSM-35 Babuçcuoğlu, Yurdaer; Yücel, Hayrettin; Department of Chemical Engineering (2007) This study investigated the equilibrium sorption capacities and rates of sorption of some alcohols on Na- and/or H- form of ZSM-35 at different temperatures by gravimetric method using an electrobalance. The alcohols studied were methanol, ethanol, propan-1-ol, propan-2-ol, n-butanol. The ZSM-35 sample used in sorption experiments resulted from a study for synthesis of high silica ZSM-35 zeolite. This ZSM-35 sample was called as NaZSM-35. The influence of ion-exchange on the sorption capacity and kinetics w...

Citation Formats

G. Doǧu, A. Keskin, and T. Doǧu, “Dynamic analysis of changes in diffusion and sorption parameters in the reaction of SO2with activated soda ash,” The Canadian Journal of Chemical Engineering, pp. 605–610, 1988, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51905.