关键词: 甲基叔丁基醚, 状态方程, 热力学性质

Abstract: In this work, the equation of state for Methyl tert-butyl ether (MTBE) has been developed based on the published experimental data using the Helmholtz energy as the fundamental property with independent variables of density and temperature. Overall, the uncertainty of the equation of state is 1.0% in vapor pressure bellow 430 K, and increases as the temperature increases due to a lack of experimental data. The uncertainty in density ranges from 0.1% in the liquid region to 1.0% elsewhere, including the critical and vapor regions. The uncertainties in the properties related to energy (such as heat capacity and sound speed) are estimated to be 0.5%. In the critical region, the uncertainties are higher for all properties except vapor pressure. The behavior of the equation of state is reasonable within the region of validity and at higher and lower temperatures and pressures. A detailed analysis has been performed in the article.