Kristanto, Dedy and Hermawan, Yulius Deddy (2020) Comparative Analysis Between PI Conventional and Cascade Control in Heater-PFR-Series. REAKTOR: Chemical Engineering Journal, 20 (3). pp. 129-137. ISSN 0852-0798
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Abstract
The processes of heater-reactor-series are often used in the chemical process industries. Since the reactor outlet temperature increases as a result of the exothermic reaction, this temperature needs to be maintained below the upper temperature limit in order to reduce the formation of by-product and to prevent fouling in the next process heat exchangers. The goals of this work are to propose the new cascade controller and to compare with the previous Proportional-Integral (PI) controller in heater-plug-flow-reactor-series (Heater-PFR-series) to produce benzene through the reaction of hydrodealkylation of toluene (HDA). The three control models will be discussed in this paper. Model A is the previous PI controller to keep the reactor inlet temperature, model B is the new PI controller to maintain the reactor outlet temperature, and model C is the new Cascade controller to keep both reactor outlet and inlet temperatures. The main disturbance of feed flowrate was made to examine the three control models. The three control models were rigorously examined in UniSim Design R451. The PI control parameters were tuned by using “autotuner” mode of UniSim. As shown in dynamic simulation study, the three control models with its tuning parameters gave the fast and stable responses. Integral of the absolute value of the error (IAE) at the reactor outlet temperature for model A, B, and C are 3305, 2487, and 931 oC, respectively. This study revealed that model C (Cascade) acted very well to the main disturbance change in feed flowrate, responses of model C were better and faster than those in A and B.
| Item Type: | Article |
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| Uncontrolled Keywords: | cascade control; dynamic simulation; PFR; PI conventional; UniSim |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Chemistry |
| Depositing User: | Dr Y. Deddy Hermawan |
| Date Deposited: | 09 Jun 2021 06:45 |
| Last Modified: | 09 Jun 2021 06:46 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/24897 |
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