Visbreaking studies on Aghajari long residue

Krishna, Rajamani; Kuchhal, Y.K.; Sarna, G.S.; Singh, I. D.

doi:10.1016/0016-2361(88)90321-3

Cited by 39 publications

(40 citation statements)

References 6 publications

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“…However, in the case of VGO conversion, the experimental yield patterns show deviation at higher temperatures and residence time. This is in agreement with the observations of Krishna et al [9] that beyond a certain conversion level, the first-order kinetic behavior shows deviation.…”

Section: Goodness Of Fitsupporting

confidence: 94%

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Reaction pathways and product yields in mild thermal cracking of vacuum residues: A multi-lump kinetic model

Singh

Kumar

Saxena

et al. 2005

Chemical Engineering Journal

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Section: Goodness Of Fitsupporting

confidence: 94%

“…Some studies are reported with one feed and one product lump [7][8][9], whereas numbers of lumps have been reported up to 16 [10]. The criteria for lumping have been based upon statistical information [11,12], characteristic information [13] or pseudo components [6,14,15].…”

Section: Lumping Schemesmentioning

confidence: 99%

Reaction pathways and product yields in mild thermal cracking of vacuum residues: A multi-lump kinetic model

Singh

Kumar

Saxena

et al. 2005

Chemical Engineering Journal

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“…5 shows the comparison between the experimental data and the calculated kinetic curves for the products, and it is seen from the curves that the fit is good. It can be observed that the prediction accuracy of product yields by this molecular model is similar to some lumped and mechanism models previously used [1,6,11,22,37,38,41]. This indicates that the developed molecular model of HOTC describes the distribution of the products well.…”

Section: Case 1: Prediction Of Yields Of Productssupporting

confidence: 68%

“…The success of the lumped model depends on the choice of the number of lumps since more lumps result in more accurate predictions. In the current models, although some studies have been reported with one feed and one product lump [4][5][6], systems with up to 16 lumps have been reported [2]. The lumped models have been proven to be very useful for the prediction of products yield, analysis of the process, etc.…”

Section: Introductionmentioning

confidence: 92%

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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“…The residue consists of complex organic components and it is difficult to explain the true kinetics and thermal behaviour of individual molecules. However, some literature reported that the thermal cracking of VR follows a first order kinetics [46,47]. The upgradation of MVR using microwave radiation, in the presence of AC, if assumed to be a first order process leads to:…”

Section: Process Intensification Of Upgradation Of Crude Oil and Vacumentioning

confidence: 99%

Process Intensification of Upgradation of Crude Oil and Vacuum Residue by Hydrodynamic Cavitation and Microwave Irradiation

Ansari

Loke

Pandit

et al. 2015

Indian Chemical Engineer

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The crude oil and vacuum residue (VR), when subjected to the hydrodynamic cavitation (HC) or microwave irradiation, showed cracking of larger molecular weight compounds into smaller molecules. The productivity of light and intermediate petroleum fractions of the crude after the HC treatment increased in the range of 3-7%, while the microwave treatment with activated carbon as an efficient microwave absorber showed 12% conversion of VR into distillate products. The HC altered the density, viscosity, iodine values and % of distillate fractions marginally, but significantly changed the light and middle distillates recovery, and the carbon number profiles of the crude.

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Visbreaking studies on Aghajari long residue

Cited by 39 publications

References 6 publications

Reaction pathways and product yields in mild thermal cracking of vacuum residues: A multi-lump kinetic model

Reaction pathways and product yields in mild thermal cracking of vacuum residues: A multi-lump kinetic model

The Study of Molecular Modeling for Heavy Oil Thermal Cracking

Process Intensification of Upgradation of Crude Oil and Vacuum Residue by Hydrodynamic Cavitation and Microwave Irradiation

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