“…State estimation is important to model predictive control, model identification, monitoring, prediction, and fault detection of chemical processes [1]. State estimation has been applied for many chemical processes including stirred tank reactors [2]- [4], batch reactors [5]- [8], plugflow reactors [9], [10], fermentation [11], [12], distillation columns [13]- [15], oil and gas flow in pipes [16], and oil production [17]. Many chemical processes involve thermodynamic equilibrium between fluid phases.…”