The Catalytic Performance of Sol-Gel Alumina Supported Ti-Ce Catalysts for H2S Selective Oxidation to Elemental Sulfur
-
H. Mehmet Tasdemir
and
Nail Yasyerli
Abstract
In this study, alumina supported Ti-Ce catalysts (10 % by weight and Ti/Ce molar ratio is 4:1) were prepared by using wet impregnation method and their catalytic activities were tested in H2S selective oxidation to elemental sulfur. The support alumina was synthesized by classical (SGC) and modified (SGM) sol-gel methods. The N2 adsorption-desorption, XRD, XPS, EDS and FTIR techniques were used to characterize the synthesized catalysts. The N2 adsorption-desorption isotherms showed that both catalysts have mesoporous structure. Only γ-Al2O3 crystalline phase together with amorphous structure were observed in the XRD patterns. The pyridine adsorbed FTIR analyzes showed that 10 %Ti-Ce@SGC and 10 %Ti-Ce@SGM catalysts have the same Lewis acidity. The activity tests were carried out at 250 °C and with a stoichiometric feed ratio of O2 to H2S being 0.5 for two different reaction times as 150 and 510 min. Complete conversion of H2S was obtained during 180 min. and 330 min. of reaction time over 10 %Ti-Ce@SGC and 10 %Ti-Ce@SGM, respectively. However, all catalysts showed very high sulfur selectivity. Sulfur deposition was detected over 10 %Ti-Ce@SGC catalyst both 150 and 510 min. of reaction time while it was observed after 510 min. of durability test over 10 %Ti-Ce@SGM catalyst. This can be the reason for the earlier loss of catalytic activity 10 %Ti-Ce@SGC than 10 %Ti-Ce@SGM.
Acknowledgements
The Scientific and Technological Research Council of Turkey (TUBITAK, Grant 114M185) and contributions of Professor Timur Dogu of Middle East Technical University and Professor Gulsen Dogu of Gazi University are gratefully acknowledged.
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Articles in the same Issue
- Editorial
- To the Distinguished Contribution of Professor Gulsen Dogu and Professor Timur Dogu to Chemical Reaction Engineering
- Articles
- Fifty Years of Moment Technique for Dynamic Analysis of Chemical Reactor Parameters
- Trimetallic RuxMoNi Catalysts Supported on SBA-15 for the Hydrodesulfurization of Dibenzothiophene
- Highly Effective Activated Carbons from Turkish–Kozlu Bituminous Coal by Physical and KOH Activation and Sorption Studies with Organic Vapors
- The Catalytic Performance of Sol-Gel Alumina Supported Ti-Ce Catalysts for H2S Selective Oxidation to Elemental Sulfur
- Selectivity Analysis for Networks Comprising Consecutive Reactions of Second and First Order
- An Improved Analytical Solution of Population Balance Equation Involving Aggregation and Breakage via Fibonacci and Lucas Approximation Method
- Synthesis and Characterization of Aluminum Containing Silica Aerogel Catalysts for Degradation of PLA
- Hydrodynamics and Reaction Performances of Multiphase Reactors for Marine Applications – A Review
- A Diffusion Cell for the Mass Transfer Investigation in the Solid Porous Media
- Freundlich, Langmuir, Temkin, DR and Harkins-Jura Isotherm Studies on the Adsorption of CO2 on Various Porous Adsorbents
Articles in the same Issue
- Editorial
- To the Distinguished Contribution of Professor Gulsen Dogu and Professor Timur Dogu to Chemical Reaction Engineering
- Articles
- Fifty Years of Moment Technique for Dynamic Analysis of Chemical Reactor Parameters
- Trimetallic RuxMoNi Catalysts Supported on SBA-15 for the Hydrodesulfurization of Dibenzothiophene
- Highly Effective Activated Carbons from Turkish–Kozlu Bituminous Coal by Physical and KOH Activation and Sorption Studies with Organic Vapors
- The Catalytic Performance of Sol-Gel Alumina Supported Ti-Ce Catalysts for H2S Selective Oxidation to Elemental Sulfur
- Selectivity Analysis for Networks Comprising Consecutive Reactions of Second and First Order
- An Improved Analytical Solution of Population Balance Equation Involving Aggregation and Breakage via Fibonacci and Lucas Approximation Method
- Synthesis and Characterization of Aluminum Containing Silica Aerogel Catalysts for Degradation of PLA
- Hydrodynamics and Reaction Performances of Multiphase Reactors for Marine Applications – A Review
- A Diffusion Cell for the Mass Transfer Investigation in the Solid Porous Media
- Freundlich, Langmuir, Temkin, DR and Harkins-Jura Isotherm Studies on the Adsorption of CO2 on Various Porous Adsorbents
