Plantwide control for TAME production using reactive distillation

Control degrees of freedom using the restraining number: further evaluation

“…Note that the restraining number for the plug flow reactor in this process is 2 owing to the presence of the cocurrent coolant, which contributes to a second material balance without inventory. The control structure proposed by Al-Arfaj and Luyben [25] consists of 19 manipulated variables, which exactly matches our computation. Hence, the restraining number method for CDOF is extendable to reactive distillation columns and processes involving them as well without any additional considerations.…”

“…Figure 7 shows the flowsheet representation for the TAME process flow diagram taken from Al-Arfaj and Luyben. [25] The CDOF for this process, considering the number of redundancies associated with the three distillation columns (3 each) is 48 − [20 + 9] = 19. Note that the restraining number for the plug flow reactor in this process is 2 owing to the presence of the cocurrent coolant, which contributes to a second material balance without inventory.…”

A review: control of reactive divided wall distillation column

“…TAME is produced by the reaction of methanol (MeOH) and the isoamylenes 2-methyl-1-butene (2M1B) and 2-methyl-2-butene (2M2B). There are three simultaneous equilibrium reactions in the formation and splitting of TAME: the two etherification reactions and the isomerization between the isoamylenes: 2M1B +MeOH TAME (1) 2M2B +MeOH TAME (2) 2M1B 2M2B (3) Figure 4 Control structure proposed by Al-Arfaz and Luyben (2004) The control structure proposed by Al-Arfaz and Luyben [17] as shown in Figure 4 was studied the plant wide control of TAME reactive distillation column.…”

Simulation and process integration for tert-amyl-methyl ether (TAME) synthesis

“…Subawalla and Fair (1999) studied a reactive distillation system for TAME production, presenting the steady-state design of a prereactor and a reactive distillation column. Al Arfaj and Luyben (2004) extended this work to design a complete plant and to provide the plantwide control of the entire process, considering a reactive distillation column for TAME synthesis and methanol recovery using a pressure-swing azeotropic separation method. Luyben (2005) presents a quantitative steady state and dynamic comparison of the pressure-swing process with an extractive distillation process, using water as extractive agent.…”