Steady-state multiplicity in an adiabatic continuous stirred tank reactor with vapor recycle

AIChE Journal ◽  
2012 ◽  
Vol 59 (2) ◽  
pp. 553-559
Author(s):  
Kevin Brooks
Keyword(s):  
Steady State ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank ◽  
State Multiplicity

Signal Synthesis Model Reference Adaptive Controller with Artificial Intelligent Technique for a Control of Continuous Stirred Tank Reactor

2018 ◽  
Vol 17 (2) ◽  
Author(s):  
Harsh Goud ◽  
Pankaj Swarnkar
Keyword(s):  
Steady State ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Design And Implementation ◽  
Control Scheme ◽  
Signal Synthesis ◽  
Continuous Stirred Tank ◽  
The Given

AbstractModelling and controlling of Continuous stirred tank reactor (CSTR) is one of the major problems in the process industry. The nonlinear characteristic of CSTR may change the variation of temperature in either direction from the given set value. Chemical reactions within the CSTR depends on the given reference temperature. Such variation from reference values may result in degrading the variety of biomass. Design and implementation of the precise control device in such system are difficult for researchers. This paper proposes the MIT based control scheme as a solution to control problem of CSTR. An improvement of signal synthesis MIT system has been proposed in this study to enhance the steady-state and transient performance of CSTR. Artificial Bee Colony (ABC) based controller parameter tuning technique is applied to get the optimal performance of the controller. This paper shows the design and implementation of conventional PID tuned with the Z-N method, adaptive PID tune with ABC, MIT and ABC-MIT for CSTR. Detailed comparison based on simulation studies is presented which shows that ABC-MIT based control scheme improves the transient and steady state response.

Criteria for a unique steady state for enzymatic depectinization of bael (Aegle marmelos) juice in a continuous stirred tank reactor

2018 ◽  
Vol 3 (3) ◽  
pp. 333-343
Author(s):  
Sourav Sengupta ◽  
Amit Jain ◽  
Sirshendu De
Keyword(s):  
Steady State ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Aegle Marmelos ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank ◽  
Kinetics Of ◽  
Unique Steady State

The depectinization kinetics of bael (Aegle marmelos) juice using the enzyme pectinase was evaluated and it was observed to follow the Michaelis–Menten model.

scholarly journals Aplikasi Kontrol PID pada Reaktor Pabrik Asam Formiat dengan Kapasitas 100.000 Ton/Tahun

2019 ◽  
Vol 7 (2) ◽  
pp. 135
Author(s):  
Nasrul Z.A ◽  
Yonita Putri Roja ◽  
Novi Sylvia
Keyword(s):  
Steady State ◽  
Stirred Tank ◽  
Trial And Error ◽  
Continuous Stirred Tank Reactor ◽  
Set Point ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

Continuous Stirred Tank Reactor (CSTR) atau Reaktor Alir Tangki Berpengaduk(RATB) merupakan salah satu jenis reaktor yang umumnya berbentuk bejana danbekerja secara kontinyu. Continuous Stirred Tank Reactor (CSTR) banyakdigunakan untuk reaksi-reaksi homogen fase cair tanpa katalis maupun dengankatalis. Penelitian ini bertujuan untuk mendapatkan respon terbaik kontrol PIDdengan menggunakan metode trial and error pada nilai Kc, Ti, dan Td. Metodetrial and error adalah adalah metode mencari nilai parameter dengan caramencoba-coba suatu nilai tertentu sebagai parameter sampai didapat sebuahperformansi kontrol PID yang terbaik. Sistem kontrol PID merupakan controlleruntuk menentukan presisi suatu sistem instrumentasi dengan karakteristik adanyaumpan balik pada sistem tersebut (Feed back). Adapun metodologi penelitian iniadalah membuat model steady state Continuous Stirred Tank Reactor (CSTR),kemudian mengubah model steady state menjadi model dynamic, lalu membuatmodel kontrol PID, setelah itu melakukan tuning terhadap kontrol PID danmelakukan pengujian terhadap kontrol PID, dengan melakukan gangguan padaset point. Nilai Kc = 8, Ti = 1 dan Td = 0 respon waktu rata-ratanya 0,815 menit, sebuah sistem pengendalian suhu yang dapat diterapkan untuk mendapatkanwaktu yang paling optimal. Nilai Kc = 10, Ti = 4 dan Td = 0 waktu rata-ratanya1,257 menit sebuah sistem pengendalian suhu yang memiliki waktu yang kurangoptimal. Kata Kunci: Continuous Stirred Tank Reactor (CSTR), PID, Set Point.

scholarly journals Stability criteria and critical runway conditions of propylene glycol manufacture in a continuous stirred tank reactor

2015 ◽  
Vol 35 (2) ◽  
pp. 56-60
Author(s):  
Miguel Angel Gómez
Keyword(s):  
Steady State ◽  
Heat Exchange ◽  
Exchange Parameter ◽  
Stirred Tank ◽  
Coolant Fluid ◽  
Fluid Temperature ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

<p>Here, a new method for the analysis of the steady state and the safety operational conditions of the hydrolysis of propylene oxide with excess of water, in a Continuous Stirred Tank Reactor (CSTR), was developed. For industrial operational typical values, at first, the generated and removed heat balances were examined. Next, the effect of coolant fluid temperature in the critical ignition and extinction temperatures (T<sub>CI</sub> and T<sub>CE</sub>, respectively) was analyzed. The influence of the heat exchange parameter (<em>hS</em>) on coolant and critical temperatures was also studied. Finally, the steady state operation areas were defined. The existence of multiple stable states was recognized when the heat exchange parameter was in the range 6.636 &lt; <em>hS</em> kJ/(min.K) &lt; 11.125. Unstable operation area was located between the T<sub>CI</sub> and T<sub>CE </sub>values, restricting the reactor operation area to the low stable temperatures.</p>

scholarly journals ANALISA PENGENDALI HYBRID SLIDING MODE CONTROL DAN PID UNTUK MENGENDALIKAN CONCENTRATION PADA ISOTHERMAL CONTINUOUS STIRRED TANK REACTOR (CSTR)

2018 ◽  
Vol 5 (1) ◽  
pp. 1-7
Author(s):  
Ahmad Faizal ◽  
Dian Mursyitah ◽  
Ewi Imaredah ◽  
Muhammad Ikhsyan
Keyword(s):  
Steady State ◽  
Sliding Mode Control ◽  
Sliding Mode ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Set Point ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Mode Control ◽  
Continuous Stirred Tank

Sistem di industri sering terjadi kesalahan dalam mencapai kinerja atau performansi yang diinginkan. Salah satunya pada sistem isothermal CSTR dimana sistem ini belum mampu bekerja sesuai set point yang diinginkan 1 g.mol/litter, untuk mencapai set point maka digunakan pengendali Sliding Mode Control yang di  Hybrid dengan PID yang di identifikasi dengan metode FOPDT untuk menurunkan nilai error steady state. Dari pengendali tersebut didapat hasil  hasil dimana Sliding Mode Control Hybrid PID belum mampu mencapai nilai set point 1 g.mol/litter dengan t = 3.0446 detik.

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