Reaction calorimetry study of the liquid-phase synthesis of tert-butyl methyl ether

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00035a008· OSTI ID:7051458

Sola, L; Pericas, M A; Cunill, F; Iborra, M ^[1]

---

1. Univ. de Barcelona (Spain). Dept. d'Enginyeria Quimica

The liquid-phase addition of methanol to isobutene to give tert-butyl methyl ether (MTBE) on the ion-exchange resin Lewatit K2631 has been studied in a calorimetric reactor. Heat capacity of MTBE and enthalpy of the MTBE synthesis reaction in the temperature range 312--333 K have been determined. MTBE heat capacity in the liquid phase has been found to obey the equation c[sub P] (J/mol[center dot]K) = 472.34 [minus] 2.468(T/K) + 0.005071(T/K)[sup 2]. At 298 K the standard molar reaction enthalpy is [Delta]H[degree] = [minus]33.8 kJ/mol. A method to estimate apparent activation energies from heat flow rate in a given reaction has been developed and proved to be valid for the MTBE synthesis. Using this method, an apparent activation energy of 91.1--95.2 kJ/mol is calculated. A [minus]3.8 kJ/mol value has been found for the adsorption enthalpy of methanol on the ion-exchange resin Lewatit K2631 by a combination of reaction calorimetry and thermogravimetry. This allows the calculation of an activation energy on the gel phase of the resin of 91 kJ/mol.

• OSTI ID: 7051458
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 33:11; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
ETHERS
SYNTHESIS
FUEL ADDITIVES
2-METHYLPROPENE
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
GASOLINE
ION EXCHANGE MATERIALS
REACTION HEAT
ADDITIVES
ALKENES
DATA
ENTHALPY
FUELS
HYDROCARBONS
INFORMATION
KINETICS
LIQUID FUELS
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
REACTION KINETICS
THERMODYNAMIC PROPERTIES
100200* - Synthetic Fuels- Production- (1990-)