Thermodynamic models in aspen hysys Lecturer: Amirhossein Eghbalmanesh Scientific association of Chemical engineering University of tehran

Physical property It can calculate number of phases, mole and mass fractions from temperature and pressure. Calculate fraction of components in equilibrium state. Calculate volume of each phase Calculate molar enthalpy, molar entropy and heat capacity. Calculate other properties of mixture Amirhossein Eghbalmanesh

Physical Properties: Filters Equation Of State (EOS) Activity Models (ACM) Chao Seader Models (CS) Vapour Pressure Models (VP) Miscellaneous Types (MT) Amirhossein Eghbalmanesh

Equation Of State (EOS) Equations of state work reasonably well for non-polar fluids. For highly non-ideal systems another method is needed to estimate the thermodynamic properties. This method is activity models Amirhossein Eghbalmanesh

Activity Models (ACM) Amirhossein Eghbalmanesh

Chao Seader Models (CS) For heavy hydrocarbons Pressure is less than 1500 psia Temperature range 0-500 ºF CS-Grayson Streed Recommended for simulating heavy hydrocarbon systems with a high hydrocarbon content Amirhossein Eghbalmanesh

Vapour Pressure Models (VP) Used for ideal mixtures at low pressures Ideal mixtures include hydrocarbon systems and mixtures such as ketenes and alcohols Used as first approximations for non-ideal systems Antoine applicable for low pressure systems that behave ideally Braun K10 Applicable to heavy hydrocarbon systems at low pressures Esso Tabular Applicable to hydrocarbon systems at low Pressures, Employs a modification of the Maxwell-Bonnel, vapour pressure model Amirhossein Eghbalmanesh

Micellaneous Types (MT) Contains property package that are unique and do not fit into groups that are previously mentioned ASME Steam Restricted to H2O, Uses ASME 1967 Steam Table NBS Steam Restricted to H2O, Utilizes the NBS 1984 Steam Tables Amirhossein Eghbalmanesh

Amirhossein Eghbalmanesh

Amirhossein Eghbalmanesh

Physical property Chemical systems Primary models Secondary models Air seperatiom Peng-Robinson Soave-Redlich-Kwong Gas processing BWRS Gas Treating Kent-Eisenberg Electrolyte NRTL Petroleum Refining BK10 Chao-Seader Grayson-Streed Lee-Kesler-Plocker Amirhossein Eghbalmanesh

Chemical systems Primary models Secondary models Petrochemicals-VLE Peng-Robinson Soave-Redlich-Kwong PSRK NRTL UNIQUAC UNIFAC Petrochemicals-LLE Chemicals Steam NBS/NRC Electrolytes Electrolyte NRTL Zemaitis Pitzer Oligomers Polymer NRTL Polymers PC-SAFT Sanchez-Lacombe SAFT UNIFAC-FV Environmental UNIFAC+ Henry's Law Amirhossein Eghbalmanesh