Environ-economic analysis of conceptual intensification alternatives applied to the ethylbenzene production

Junqueira, Pedro G.; Caxiano, Igor Nardi; Mangili, Patrick V.; Prata, Diego Martinez

doi:10.1016/j.compchemeng.2020.106783

Cited by 9 publications

(9 citation statements)

References 31 publications

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“…For these motives, purification and separation equipment, such as distillation columns, must be utilized to obtain the main products at the desired commercial purity and to recycle unreacted feedstock, increasing the overall process' efficiency. Multiple conventional industrial plants employ these techniques: for example, the synthesis of methanol [3], butyl acetate [4], biodiesel [5], cumene [6], ethylbenzene [7] and maleic anhydride [8]. Purification process focused on reutilization, such as the purification of acetic acid [9] and toluene-benzene, are also found in conventional industry.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the monochlorobenzene separation process through heat integration: A sustainability-based assessment

PAIVA

Santos

Maia

et al. 2023

CI&CEQ

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Chlorobenzene is an important chemical intermediate in the production of commodities, such as herbicides, dyestuffs, and rubber. In this work, a heat integration was proposed for a monochlorobenzene separation process. The conventional process structure and the proposed integrated one were designed and simulated. An optimization focused on minimizing the cooling and heating costs was performed to obtain the best-operating conditions for the heat integration. The simulation of a utility plant, including cooling water and steam generation sections, was also carried out for more accurate estimations of CO2 emissions, water, energy consumption, and operating costs. The processes were evaluated and compared in terms of their sustainable performances using the eco-efficiency comparison index method and environmental and economic indicators, such as CO2 emission, water consumption, and utility cost, to assess the benefits of heat integration. The results demonstrated that the proposed strategy reduced around 57% of all environmental impacts and utility costs. As the composite evaluation index from the performance indicators showed, the proposed optimal heat integrated industrial plant significantly improved the initial processes? eco-efficiencies, up to 83%, proving a suitable strategy for a more sustainable process.

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Section: Introductionmentioning

confidence: 99%

Improvement of the monochlorobenzene separation process through heat integration: A sustainability-based assessment

PAIVA

Santos

Maia

et al. 2023

CI&CEQ

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“…In terms of process intensification, a liquid phase reactive distillation was first introduced by CD Tech, in 1994 . The upper part of the reactive distillation is filled with a catalyst, and the alkylation is processed simultaneously with rectification.…”

Section: Introductionmentioning

confidence: 99%

“…A small amount of the literature has studied the performance of the economic and environmental process, energy criteria of EB production, and their optimization, which is also important to improve quality and efficiency. An economic-environmental assessment of five intensified processes for the EB production is carried out by Junqueira et al to compare their performance with the traditional process . Hang et al built a neural network for the reactor and distillation column of a pure-ethylene process to minimize energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…6 In terms of process intensification, a liquid phase reactive distillation was first introduced by CD Tech, in 1994. 9 The upper part of the reactive distillation is filled with a catalyst, and the alkylation is processed simultaneously with rectification. Khlebnikova et al improved the process efficiency by intensifying the reagents' mixing before the alkylation reactor.…”

Section: Introductionmentioning

confidence: 99%

“…An economic-environmental assessment of five intensified processes for the EB production is carried out by Junqueira et al to compare their performance with the traditional process. 9 Hang et al built a neural network for the reactor and distillation column of a pure-ethylene process to minimize energy consumption. The results indicated that the heating utility consumption is reduced by 55.2%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiobjective Economic-Environmental-Selectivity Optimization of the Dry Gas Based Ethylbenzene Production Process

Han

Zhao

2021

Ind. Eng. Chem. Res.

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The ethylbenzene production process from dry gas has been an energy-intensive process that will inevitably bring about massive carbon emissions. With increasingly stringent regulations to mitigate the effect of greenhouse gas emissions, decision-makers need to make a trade-off among the objectives of environmental impact, economic benefit, and process indicators. An integrated framework combining simulation and multiobjective optimization is proposed to address this issue. The model of the dry gas based ethylbenzene production process is developed by Aspen Plus. The multiobjective optimization (MOO) model, including the profit before tax (PBT), greenhouse gas emissions (GHGs), and alkylation reaction selectivity (S AR ), is then derived considering the operational flexibility and mass and energy balance constraints. The Nondominated Sorting Genetic Algorithm II (NSGA-II) is used to solve this problem, and the three-dimensional Pareto front is obtained. The TOPSIS method is employed to select a specific solution from the Pareto front. Then, the sensitivity analysis is performed to assess the effects of the decision variables on the objectives. Compared with the original operating conditions, a substantial reduction in GHGs (23%) and a slight increase in PBT (4.1%) are achieved at the expense of specific S AR (5.3%).

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Calculation of the anharmonic effect on the main reactions referring to ethylbenzene combustion mechanism

Song

Wang

et al. 2022

J Chinese Chemical Soc

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About 11 reactions related to ethylbenzene are studied in this paper using transition state theory. The YL method proposed by Yao and Lin is utilized to calculate the anharmonic and the harmonic rate constants in these reaction processes in the temperature range of 300-4,000 K, energy diagram and the temperature dependence of the rate coefficients are also presented. The calculations indicate that the harmonic rate constants are larger than the anharmonic rate constants in most cases. Especially, there is a temperature junction between the high and low relationship between the anharmonic and harmonic rate constants in several reactions. Furthermore, the calculated values are in good agreement with other theoretical ones within the allowable error. Finally, the kinetic parameters and the thermodynamic parameters are calculated. To sum up, it can be concluded that the anharmonic effect in these reactions is very significant and cannot be ignored.

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Environ-economic analysis of conceptual intensification alternatives applied to the ethylbenzene production

Cited by 9 publications

References 31 publications

Improvement of the monochlorobenzene separation process through heat integration: A sustainability-based assessment

Improvement of the monochlorobenzene separation process through heat integration: A sustainability-based assessment

Multiobjective Economic-Environmental-Selectivity Optimization of the Dry Gas Based Ethylbenzene Production Process

Calculation of the anharmonic effect on the main reactions referring to ethylbenzene combustion mechanism

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