Online Feasibility And Effectiveness Of A Spatio-temporal Nonlinear Model Predictive Control: The Case Of Methanol Synthesis Reactor

This work provides the theoretical formulation, implementation directives and validation case for the extension of the nonlinear model predictive control from the time domain to the spatio-temporal domain. Effectiveness and online feasibility are demonstrated for industrial processes of distributed nature. The case of methanol synthesis (control of hot-spot temperature and axial position) is selected. © 2012 Elsevier B.V.30867871Bendersky, E., Christofides, P.D., Optimization of transport-reaction processes using nonlinear model reduction (2000) Chemical Engineering Science, 55, pp. 4349-4366Buzzi-Ferraris, G., Manenti, F., A Combination of Parallel Computing and Object-Oriented Programming to Improve Optimizer Robustness and Efficiency (2010) Computer Aided Chemical Engineering, 28, pp. 337-342Christofides, P.D., Daoutidis, P., Nonlinear control of diffusion-convection-reaction processes (1996) Computers & Chemical Engineering, 20, pp. S1071-S1076Flores-Tlacuahuac, A., Biegler, L.T., Saldivar-Guerra, E., Optimal grade transitions in the high-impact polystyrene polymerization process (2006) Ind. Eng. Chem. Res., 45, pp. 6175-6189Liu, J., de la Pena, D.M., Christofides, P.D., Distributed Model Predictive Control of Nonlinear Process Systems (2009) Aiche Journal, 55, pp. 1171-1184Lou, Y.M., Hu, G.S., Christofides, P.D., Model predictive control of nonlinear stochastic partial differential equations with application to a sputtering process (2008) Aiche Journal, 54, pp. 2065-2081Lurgi, G., (2009) Lurgi MegaMethanol®, , http://www.lurgi.comManenti, F., Considerations on Nonlinear Model Predictive Control Techniques (2011) Computers & Chemical Engineering, 35, pp. 2491-2509Manenti, F., Cieri, S., Restelli, M., Considerations on the steady-state modeling of methanol synthesis fixed-bed reactor (2011) Chemical Engineering Science, 66, pp. 152-162Manenti, F., Cieri, S., Restelli, M., Lima, N.M.N., Zuniga Linan, L., Dynamic Simulation of Lurgi-type Reactor for Methanol Synthesis (2011) Chem. Eng. Trans., 24, pp. 379-384Morari, M., Lee, J.H., Model predictive control: past, present and future (1999) Computers & Chemical Engineering, 23, pp. 667-682Ni, D., Christofides, P.D., Multivariable predictive control of thin film deposition using a stochastic PDE model (2005) Industrial & Engineering Chemistry Research, 44, pp. 2416-2427Palavajjhala, S., Motard, R.L., Joseph, B., Blocking and Condensing design for quadratic dynamic matrix control using wavelets (1994) Ind. Eng. Chem. Res., 33, pp. 1159-117