Thorough assessment of delayed coking correlations against literature data: Development of improved alternative models

Ghashghaee, Mohammad

doi:10.1007/s11144-018-1467-0

Cited by 9 publications

(6 citation statements)

References 48 publications

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“…Pirdashti et al provided a review on the applications of ANN. ANN-based modeling has been successfully applied to crude oil distillation, hydrocracker, hydrodesulfurization, and delayed coking . Robustness and accuracy are essential for models using thermal integration MOO in the distillation process.…”

Section: Introductionmentioning

confidence: 99%

“…ANN-based modeling has been successfully applied to crude oil distillation, 13 hydrocracker, 14 hydrodesulfurization, 15 and delayed coking. 16 Robustness and accuracy are essential for models using thermal integration MOO in the distillation process. Sufficient information is also required to represent the synergy between the distillation process and the heatexchanger network (HEN).…”

Section: Introductionmentioning

confidence: 99%

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Energy and Production Efficiency Optimization of an Ethylene Plant Considering Process Operation and Structure

Wang

Zhu

2020

Ind. Eng. Chem. Res.

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Nowadays, optimizing the efficiency of energy and production has become a hot research area. In this paper, a hybrid multiobjective optimization model integrating NSGA-II and the genetic algorithm with artificial neural network is proposed to improve the production efficiency while reducing the total energy consumption of an ethylene plant incorporating process operating variables and structure in the cryogenic separation system. A novel multiobjective mix-integer nonlinear programming (MOMINLP) model is built to obtain key decision variables and the Pareto frontier of multiobjective optimization. Specifically, an accurate model of the heat capacity affected by the temperature and phase changes is established to enhance the estimation of energy requirements. In addition, redundant variables with little effect or even bad influences on multiobjective optimization are removed, which reduces complexity and further improves performance. To verify the performance of the proposed methodology, two case studies concerning optimizing the process operating conditions and structure of an ethylene plant using the proposed MOMINLP are carried out. Simulation results show that the overall profits of the ethylene plant are improved and the energy consumption is effectively reduced by taking the economic and energy cycles into consideration, which indicates that the proposed methodology can provide an effective way to improving production efficiency while reducing the energy consumption.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy and Production Efficiency Optimization of an Ethylene Plant Considering Process Operation and Structure

Wang

Zhu

2020

Ind. Eng. Chem. Res.

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“…Process intensification schemes can always be pursued for higher performance of the established technologies throughout the chemical industry [19][20][21][22][23][24][25][26][27]. Although the bioleaching process is beneficial for climate change mitigation, the slow kinetics of the reactions in this process has to be improved for successful implementation [17], which in turn requires the optimization of the process with respect to the influencing parameters [28].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of different bioreactor systems with Acidithiobacillus ferrooxidans for ferrous iron oxidation

Yavari

Ebrahimi

Aghazadeh

et al. 2019

Reac Kinet Mech Cat

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The relative performance of two biofilm-based airlift reactors using different kinds of packing materials and one fixed bed biofilm reactor with a homemade packing material of high specific area (~ 1000 m 2 /m 3) was addressed. The bioreactors operated under ferrous iron loading rates in the range of 8-120 mol Fe(II)/m 3 h. Acidithiobacillus ferrooxidans cells immobilized in the three bioreactors afforded the reactions for an extended period of 120 days of continuous operation at the dilution rates of 0.2, 0.4, 0.7, 1 and 1.2 h −1. The maximum ferrous iron oxidation rates achieved in this study at a hydraulic residence time of 1.2 h were about 91, 68 and 51 mol Fe(II)/ m 3 h for the fixed bed, airlift1, and airlft2 bioreactors. The performance data from the fixed-bed bioreactor offered a higher potential for ferrous iron oxidation because of fast biofilm development, the formation of a thick biofilm, and lower sensitivity to shear, which enhanced the startup time of the bioreactor and the higher reactor productivity. Proper kinetic models were also presented for both the startup period and the steady-state process.

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“…Catalytic cracking of viscous heavy hydrocarbons − is one of the leading technologies in petrorefineries and petrochemical industries to produce light olefins (including ethylene, propylene, and butenes) and middle distillates to meet the growing worldwide demands. − Lower-energy consumption, CO 2 emission, and coke formation, as well as improved selectivity toward the desired products, form the pillars of preference of fixed-bed or fluid catalytic cracking (FCC) approaches over thermal cracking of these heavy feedstocks. − Despite the progress in the FCC and residue FCC (RFCC), it is still challenged by the market demands in the opposite direction of the regular changes in the quality of the feedstock, which entail rapid deactivation of the catalyst because of fouling and poisoning. , Among the most widely applied catalysts in these types of reactions are zeolites, which have astonishing features, such as shape selectivity, high thermal and mechanical stability, tunable acidity, and hydrophilicity. ,− As an example of various types of zeolites, H-ZSM-5 (MFI), probably the most well-known solid acid catalyst, has attracted considerable attention in many reaction systems including the catalytic cracking. , By far, intensive research has been devoted to modify the zeolite characteristics or improve the quality of the applied feedstock prior to the cracking reactions ,− to tackle the abovementioned obstacles.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Coconversion of Refinery Fuel Oil and Methanol over H-ZSM-5 Catalyst for Enhanced Production of Light Olefins

et al. 2019

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Application of methanol as a coreactant in the atmospheric catalytic cracking of refinery fuel oil (abbreviated as the MFOCC process) over the H-ZSM-5 catalyst has been investigated for the first time with the aim to improve the olefin productivity of the heavy hydrocarbons and mitigate coke formation and catalyst deactivation. The results clearly proved the synergistic influence of cocracking in the MFOCC scenario. The integrated MFOCC process increased both light olefin (C 2 = − C 4 = ) yield and gasoline (C 5 −C 11 ) share of the liquid products to more than 36.7 and 78.7 wt %, respectively. Influence of contact time and temperature was also discussed.

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Thorough assessment of delayed coking correlations against literature data: Development of improved alternative models

Cited by 9 publications

References 48 publications

Energy and Production Efficiency Optimization of an Ethylene Plant Considering Process Operation and Structure

Energy and Production Efficiency Optimization of an Ethylene Plant Considering Process Operation and Structure

Kinetics of different bioreactor systems with Acidithiobacillus ferrooxidans for ferrous iron oxidation

Synergistic Coconversion of Refinery Fuel Oil and Methanol over H-ZSM-5 Catalyst for Enhanced Production of Light Olefins

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