Kinetic Studies of Low Severity Visbreaking

Kataria, Kamal L.; Kulkarni, Rohit P.; Pandit, Aniruddha B.; Joshi, Jyeshtharaj B.; Kumar, Manmohan

doi:10.1021/ie0305723

Cited by 47 publications

(87 citation statements)

References 17 publications

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“…The training data required to establish the correlative models were taken from studies implemented at different temperatures, pressures, residence times, and types of feed (long and short residues and some asphaltenes separated from crude oils) reported in the literature, including [4,10,[12][13][21][22][23][24][25][26][27][28][29][30][31][32][33][34] for the resid yield, [4, 10, 12-13, 21-23, 25-35] for the liquid yield, [4, 6, 10, 12-13, 21-23, 25-40] for the yield of distillate in terms of conversion (resid yield), [4, 10, 12-13, 21-23, 25-35] for the gas yield, [4, 12-13, 21-22, 31-35] for the yield of heavy gas oil, and [22-23, 25, 29-30, 32-34, 41] for the liquid sulfur concentration. Parts of the information obtained from the literature with incomplete or no feed specifications reported therein [3,7,20,[42][43][44][45][46][47][48] or those employing hydrotreated residues [49] were excluded from the modeling.…”

Section: New Correlationsmentioning

confidence: 99%

“…A first-order power-law expression is usually found to describe the kinetics of upgrading satisfactorily with a reaction rate constant obeying a standard Arrhenius-type temperature-dependence [9][10][11][12][13][14][15]. At high conversions, however, the polymerization reactions may upset the first-order kinetics [9].…”

Section: Introductionmentioning

confidence: 99%

“…Another empiric model of visbreaking has been presented by Kataria et al [3,12] who considered the following overall functionality for the product yields:…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Predictive correlations for thermal upgrading of petroleum residues

Ghashghaee

2015

Journal of Analytical and Applied Pyrolysis

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Section: New Correlationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predictive correlations for thermal upgrading of petroleum residues

Ghashghaee

2015

Journal of Analytical and Applied Pyrolysis

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“…The estimation of the rate constants was achieved by non-linear regression (Kataria et al, 2004), which involves minimization of the sum of square of error (SSE) objective function given as follows:…”

Section: Reaction Kineticsmentioning

confidence: 99%

Use of ultrasound in petroleum residue upgradation

et al. 2009

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Conventional processes for the upgradation of residual feedstocks, viz., thermal cracking and catalytic cracking are carried out in the temperature range of 400-520 • C. Such high temperatures can in principle be substituted by acoustic cavitation. In the present work, two vacuum residues, namely, Arabian mix vacuum residue (AMVR) and Bombay high vacuum residue (BHVR) and one asphalt, viz., Haldia asphalt (HA) were subjected to acoustic cavitation for different reaction times from 15 min to 120 min at ambient temperature and pressure. An attempt has been made to seek a performance comparison of two devices of acoustic cavitation, namely, ultrasonic bath and ultrasonic horn with regard to their ability to upgrade the petroleum residues to lighter, more value-added products mainly the hydrocarbons boiling in the range of gas oil fraction. Another attempt has been made to study the effect of ultrasound on the upgradation of the residue when it is emulsified in water with the help of different surfactants. For all the cases, a kinetic model has been developed based on the constituents of the residue so as to get an insight into the reaction mechanism. The study revealed that ultrasonic horn is more effective in bringing about the upgradation than ultrasonic bath and that the acoustic cavitation of the aqueous emulsified hydrocarbon mixture could reduce the asphaltenes content to a greater extent than the acoustic cavitation of non-emulsified hydrocarbon mixture. The reduction in asphaltenes content of BHVR was found to be more followed by AMVR followed by HA. The variation in the rate constants was found to be feed specific and the rate constants for the conditions of maximum conversion of asphaltenes to gas oil for AMVR, BHVR and HA were found to be 0.29 × 10 −4 s −1 , 1.4 × 10 −4 s −1 and 0.23 × 10 −4 s −1 , respectively.Les procédés traditionnels visantà enrichir la concentration des matières premières résiduelles, c.-à-d. le craquage thermique et le craquage catalytique, se fontà des températures variant entre 400 et 520 • C. Des températures aussiélevées peuvent, en principe,être substituées par la cavitation acoustique. Dans le cadre de cetteétude, deux résidus sous vide,à savoir le mélange arabe de résidus sous vide (MARSV) et le résidu de vide poussé de Bombay (RVPB) et un asphalte, c.-à-d. l'asphalte Haldia (AH), ontété soumisà la cavitation acoustique selon différents temps de réaction, variant entre 15 et 120 minutes,à la température et la pression ambiantes. Une tentative aété faite pour chercherà obtenir une comparaison du rendement des deux dispositifs de cavitation acoustique,à savoir un bainà ultrasons et une sondeà ultrasons, en ce qui a traità leur capacitéà enrichir la concentration des résidus de pétrole de façonà obtenir des produits plus légersà valeur ajoutée accrue, principalement les hydrocarbures enébullition dans la gamme de fractions gaz-pétrole. Une autre tentative aété faite pourétudier l'effet des ultrasons sur l'enrichissement de la concentration du résidu lorsqu'il est enémulsion dans...

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“…However, Martinez et al [17] has presented second-order rate kinetics in their studies on the thermal cracking of asphaltenes separated from coal liquefaction. According to Kataria et al [3], the reported lumped models can be categorized into parallel reaction models and parallel-consecutive reaction models. The main difference between these two classes is that the formed product lumps may undergo further thermal cracking in the parallel-consecutive reaction models.…”

Section: Introductionmentioning

confidence: 99%

The Study of Molecular Modeling for Heavy Oil Thermal Cracking

Liang

Zhang

2007

Chem Eng & Technol

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The tighter specifications for refining products have gradually led refineries to focus on the molecular modeling of petroleum processing. In this work, a systematic methodology is presented for the molecular modeling of heavy oil thermal cracking (HOTC). This research which is based on a microscopic understanding provides a basis to achieve better design, management, optimization, and control of HOTC. The molecular information of HOTC product streams is represented in the form of a MTHS (molecular type homologous series) matrix. From consideration of the complexity of structural isomers in heavy petroleum fractions, the heavy molecules in a homologous series are grouped to reduce the dimension of the MTHS matrix. Transformation correlations are developed to capture the molecular properties of each homologous series in the MTHS matrix and to interrelate the molecular composition and bulk properties of the product streams. The HOTC process model was built on the basis of the molecular representation provided by the MTHS matrix and the transformation correlations. Two case studies are illustrated for validation of the proposed model and methodology.

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Kinetic Studies of Low Severity Visbreaking

Cited by 47 publications

References 17 publications

Predictive correlations for thermal upgrading of petroleum residues

Predictive correlations for thermal upgrading of petroleum residues

Use of ultrasound in petroleum residue upgradation

The Study of Molecular Modeling for Heavy Oil Thermal Cracking

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