The stability of toluene mononitration in reaction calorimeter reactor

Luo, Kuo-Ming; Chang, Jih-Guang

doi:10.1016/s0950-4230(97)00019-3

Cited by 14 publications

(6 citation statements)

References 12 publications

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“…The data used for this reaction network, relevant to industry, are given in Table 3. Table 3: Process parameters for the nitration of toluene reaction network (Luo and Chang, 1998;Sheats and Strachan, 1978;Chen et al, 2008;Mawardi, 1982). Hence, this reaction process gives a good challenge in order to keep the process under control.…”

Section: Industrial Case Study: Nitration Of Toluenementioning

confidence: 99%

Optimal Laypunov exponent parameters for stability analysis of batch reactors with Model Predictive Control

Kähm

Vassiliadis

2018

Computers & Chemical Engineering

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Thermal runaways in exothermic batch reactions are a major economic, health and safety risk in industry. In literature most stability criteria for such behaviour are not reliable for nonlinear non-steady state systems. In this work, Lyapunov exponents are shown to predict the instability of highly nonlinear batch processes reliably and are hence incorporated in standard MPC schemes, leading to the intensication of such processes. The computational time is of major importance for systems controlled by MPC. The optimal tuning of the initial perturbation and the time frame reduces the computational time when embedded in MPC schemes for the control of complex batch reactions. The optimal tuning of the initial perturbation and time horizon, dening Lyapunov exponents, has not been carried out in literature so far and is here derived through sensitivity analyses. The computational time required for this control scheme is analysed for the intensication of complex reaction schemes.

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Section: Industrial Case Study: Nitration Of Toluenementioning

confidence: 99%

Optimal Laypunov exponent parameters for stability analysis of batch reactors with Model Predictive Control

Kähm

Vassiliadis

2018

Computers & Chemical Engineering

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“…The reactor dimensions for this system are given in Table 1. (Chen et al, 2008;Luo and Chang, 1998;Mawardi, 1982;Sheats and Strachan, 1978).…”

Section: Industrial Case Study: Nitration Of Toluenementioning

confidence: 99%

Thermal stability criterion of complex reactions for batch processes

Kähm

Vassiliadis

2019

Chemical Engineering Research and Design

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Thermal stability of batch processes is a major factor for the safe and efficient production of polymers and pharmaceutical chemicals. The prediction of the thermal stability for such processes was shown in Kähm and Vassiliadis (2018d) to be unreliable with most stability criteria found in literature also presenting a novel criterion, K, which was shown to give reliable stability predictions for single reactions of higher order. This work provides a detailed derivation for the generalization of thermal stability criterion K applied to reaction networks of arbitrary complexity, consisting of parallel and competing reactions of both exothermic and endothermic nature. The generalized thermal stability criterion K is then applied to Model Predictive Control (MPC) frameworks to intensify batch processes in a safe manner, reducing the time required to reach the target conversion. Several illustrative computational case studies are presented, highlighting the proposed methodology and verifying its validity.

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“…(15) or (16) after the value of T C is determined from Eq. (18). The calculated results of T a versus hS at the critical runaway conditions and stable temperatures for the catalytic decomposition reaction of hydrogen peroxide at volumetric ratios 15:1, 7:1 and 13:3 of hydrogen peroxide to hydrochloric acid are shown in Fig.…”

Section: The Stable Criteria and Critical Runaway Temperatures For Thmentioning

confidence: 99%

“…(21) is the sufficient and necessary conditions for a stable reaction system. These criteria of stability had been analyzed by Luo et al [17][18][19].…”

Section: The Stable Criteria and Critical Runaway Temperatures For Thmentioning

confidence: 99%

“…The evaluations of kinetic parameters were incorporated with Semenov's sufficient and necessary conditions of thermal explosion to determine the critical runaway reaction temperatures and stable criteria [7][8][9][10][11][12][13][14][15][16][17][18][19]. The requirements of heat transfer coefficient in the critical conditions can also be estimated.…”

Section: Introductionmentioning

confidence: 99%

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