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ETBE Synthesis via Reactive Distillation
Ethyl tert-Butyl Ether (ETBE) synthesis using ethanol (EtOH) and tert-butyl alcohol (TBA) was studied under atmospheric pressure conditions with different macroporous and gelular ion exchange resin catalysts. The catalysts used were Purolite ® (CT-124, CT-145H, CT-151, CT-175, CT-275) and Amberlyst-15 and 35, all in H+ form. All catalysts were employed for ETBE synthesis under identical conditions and suitable catalyst was decided on the basis of conversion and selectivity. Among the catalysts studied, CT-124 produced the best results and was used for further studies. Effect of temperature, feed molar ratio of reactants and catalyst loading was studied and the optimum conditions found were: 343 K temperature, 1:2 feed mole ratios and 5 % catalyst loading. Kinetic modeling was performed using various heterogeneous reactions models and it was found that Quasi-Homogeneous model represented the system more adequately.
Bio-ETBE is produced by synthesizing plant-derived bioethanol and petroleum-derived isobutene. Bio-gasoline containing bio-ETBE is supplied to ordinary automobiles at gas stations in the same manner as ordinary refilling.
When an automobile runs with bio-gasoline, a reduction of greenhouse gas emissions (mainly CO2) from the automobile can be expected from the viewpoint of the carbon neutral concept.* The number of gas stations supplying bio-gasoline will gradually increase as permanent introduction of bio-gasoline is scheduled for 2010.
TOYO is implementing an engineering, procurement, and construction project to convert an existing MTBE (synthesized from natural gas-derived methanol and isobutene) facility to an ETBE facility for Nippon Oil Corporation Negishi Refinery. This facility will be the first ETBE commercial plant in Japan.
Bio-ETBE is produced by synthesizing plant-derived ..
., 36, 1855-1869 (1997).
8 Fite, C., Iborra, M., Tejero, J., Izquierdo, J.F., Cunill, F., 鈥淜inetics of the liquid-phase synthesis of ethyl -butyl ether (ETBE)鈥?
A pervaporation membrane reactor for the synthesis of ethyl -butyl ether (ETBE) from a liquid phase reaction between ethanol (EtOH) and -butyl alcohol (TBA) was investigated. Supported β-zeolite and a polyvinyl alcohol (PVA) membrane were used as a catalyst and a membrane in the reactor, respectively. The permeation studies of an H2O-EtOH binary system revealed that the membrane worked effectively for H2O removal at the mixtures containing H2O content lower than 62 mol%. The permeation studies of quaternary mixtures (H2O-EtOH-TBA-ETBE) were performed at 3 temperature levels of 323, 333 and 343 K. It was found that the membrane was preferentially permeable to H2O. The permeability coefficients were correlated with the Arrhenius equation. In the pervaporation membrane reactor studies, both experiment and simulation were carried out. An activity-based model was developed to investigate the performance of the pervaporation membrane reactor using parameters obtained from other independent experiments. The simulation results agreed well with experimental results. It was observed that the ratio of the initial mole of EtOH to TBA (λ), the ratio of the membrane area to the initial mole of TBA (δ), the ratio of the amount of catalyst to the initial mole of TBA (ø), the operating temperature and the membrane selectivity played important roles on the reactor performance. The analysis of the operating temperature showed an optimum yield due to the competing effect of the rate of reaction and the rate of reactant losses.
Kinetics of the Liquid-Phase Synthesis of Ethyl tert …
In: 18th European Symposium on Computer Aided Process Engineering, Braunschweig, B., Joulia, X., eds., Elsevier B.V./Ltd., Lyon, France (2008).
14 Umar, M., Patel, D., Saha, B., 鈥淜inetic studies of liquid phase ethyl -butyl ether (ETBE) synthesis using macroporous and gelular ion exchange resin catalysts鈥?
The purpose of this work is to optimize the synthesis of ETBE eliminating the introduction of water into the system to break the ETBE/Ethanol azeotrope.
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etbe | Gasoline | Chemical Kinetics
- It is used as a solvent, as a denaturant for ethanol, as an ingredient in paint removers, as an octane booster for gasoline, as an oxygenate gasoline additive, and as an intermediate in the synthesis of other chemical commodities such as MTBE, ETBE, TBHP, other flavors and perfumes.
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