Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
DRIFT studies for the reaction and adsorption of alcohols and isobutylene on acidic resin catalysts and the mechanism of ETBE and MTBE synthesis
Date
2001-11-14
Author
Doğu, Timur
Aydin, E
Oktar, N
Murtezaoglu, K
Dogu, G
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
163
views
0
downloads
Cite This
Diffuse reflectance FT-IR spectra of methanol and ethanol on Amberlyst 15 and on a synthesized acidic resin catalyst indicate that alcohol molecules are adsorbed by forming hydrogen bridges with the -SO3H sites of the catalyst and among themselves. Some of the alcohol molecules were found to be strongly chemisorbed by dissociation of one or two hydrogen atoms. Isobutylene was also found to be strongly adsorbed by forming a bridged structure between the adsorbed alcohol molecules and the -SO3H groups. DRIFT spectra verified the presence of adsorbed ether molecules formed as a result of surface reaction and supported a Langmuir-Hinshelwood-type reaction mechanism.
Subject Keywords
Liquid-Phase Synthesis
,
Ethanol
,
Ether
,
Etherıfication
,
Kinetics
,
Tame
URI
https://hdl.handle.net/11511/62999
Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Collections
Graduate School of Natural and Applied Sciences, Article
Suggestions
OpenMETU
Core
Production of lactic acid esters catalyzed by heteropoly acid supported over ion-exchange resins
AYTURK, E; Hamamcı, Haluk; Karakaş, Gürkan (2003-01-01)
The heterogeneous liquid-phase esterification reaction of lactic acid with ethyl alcohol accompanied with lactoyllactic acid hydrolysis over heteropoly acid supported on ion exchange resin catalysts was investigated at 343 K with ethanol to lactic acid molar ratio of 1:1. The catalysts with 5-20% of tungstophosphoric (H(3)PW(12)O(40).xH(2)O) and molybdophosphoric (H(3)PMo(12)O(40).xH(2)O) acid type of heteropoly acids over Lewatit(R) S100 showed higher activities than the resin itself. DRIFTS and XRD analys...
Diffusion Resistances and Contribution of Surface Diffusion in TAME and TAEE Production Using Amberlyst-15
Doğu, Timur; Boz, Nezahat; MÜRTEZAOĞLU, KIRALİ; DOĞU, GÜLŞEN (2003-01-01)
Effective diffusivities and adsorption equilibrium constants of methanol, ethanol and 2-methyl-2-butene (2M2B), in Amberlyst 15, were evaluated from batch adsorption experiments. Moment expressions derived for different models involving diffusion resistances in the macropores and within the gel-like micrograins were used for the evaluation of effective diffusion coefficients. Contribution of surface diffusion to diffusion flux within the macropores was found to be quite significant. Also, it was found that ...
Modeling and control studies for a reactive batch distillation column
Bahar, Almıla; Özgen, Canan; Department of Chemical Engineering (2007)
Modeling and inferential control studies are carried out on a reactive batch distillation system for the esterification reaction of ethanol with acetic acid to produce ethyl acetate. A dynamic model is developed based on a previous study done on a batch distillation column. The column is modified for a reactive system where Artificial Neural Network Estimator is used instead of Extended Kalman Filter for the estimation of compositions of polar compounds for control purposes. The results of the developed dyn...
Dimethyl ether from syngas and effect of CO2 sorption on product distribution over a new bifunctional catalyst pair containing STA@SBA-15
ÇELİK ÖZCAN, MERVE; PEKMEZCİ KARAMAN, BİRCE; OKTAR, NURAY; Doğu, Timur (2022-12-01)
Direct synthesis of dimethyl ether (DME) from syngas was investigated in the presence of a bifunctional catalyst pair containing silicotungstic acid (STA) incorporated SBA-15 (5, 10, 25% by wt. STA) for the in-situ dehydration of synthesized methanol. The methanol synthesis component of this catalyst mixture is a Cu/ZnO-based commercial (HF) catalytic material. The new STA@SBA-15 type solid acid catalysts synthesized in this study indicated ordered mesoporous structures with surface area values in the range...
Dielectric properties of fuel oils and their ethanol mixtures investigated by terahertz time-domain spectroscopy
Arık, Enis; Esentürk, Okan; Altan, Hakan; Department of Chemistry (2013)
The purpose of this study is to investigate the dielectric properties of fuel oils and their ethanol mixtures in the THz spectral region. We presented frequency dependent absorption coefficients, refractive indices, and dielectric constants calculated from the measurements of pure and mixtures of fuel oils. As the mixing ratio changes, meaningful shifts were observed in refractive index and absorption coefficient of the mixtures. For pure liquids, we used Debye model which provides a good estimate for the d...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
T. Doğu, E. Aydin, N. Oktar, K. Murtezaoglu, and G. Dogu, “DRIFT studies for the reaction and adsorption of alcohols and isobutylene on acidic resin catalysts and the mechanism of ETBE and MTBE synthesis,”
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
, pp. 5044–5051, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62999.