High-pressure heat-flow calorimeter. Determination of the enthalpy of reaction for the synthesis of methyl t-butyl ether from methanol and 2-methylpropene

Article abstract of DOI:10.1016/0021-9614(85)90009-6

A high-pressure heat-flow calorimeter suitable for measuring enthalpies of reaction and heat capacities is described.With the calorimeter, thermodynamic properties can be studied from 290 to 600 K and from 0.1 to 10 MPa.The reaction enthalpy for the synthesis of methyl t-butyl ether from methanol and 2-methylpropene using an acidic ion-exchange-resin catalyst was measured at 319 K and 1.6 MPa.The molar reaction enthalpy is given by Δ_rH_m(319 K, 1.6 MPa) = -(39.8 +/- 0.4)kJ.mol^-1.The corresponding standard molar enthalpy of formation of methyl t-butyl ether is Δ_fH_m⁰(l, 298.15 K) = -315.4 kJ.mol^-1.