Composition and visbreakability of petroleum residues

Carlo, S. Di; Janis, Baumanis Paul

doi:10.1016/0009-2509(92)87115-7

Cited by 51 publications

(69 citation statements)

References 2 publications

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“…It has also been reported that the feedstocks with more saturates yield comparatively more gas oil fractions than gases and gasoline whereas more naphthenic/aromatic feedstock yield more light fractions, e.g., gases and gasoline [7] due to presence of small side chains attached to naphthenic/aromatic ring.…”

Section: Cracking Behaviormentioning

confidence: 96%

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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: Cracking Behaviormentioning

confidence: 96%

“…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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“…Structurally, resins consist of an appreciable amount of aromatic carbon content (40-53%) with intermediate paraffi n chain length on naphthenic structures and aromatic rings, and about two thirds of its aromatic carbon atoms are nonbridged. The resin fraction acts as the dispersant for the asphaltenic component in the maltene phase (Di Carlo and Janis, 1992). Figure 5 shows the hypothetical structures of resin bottom is fully carbonized and develops a porous structure through which gases and liquid can pass.…”

Section: Resinsmentioning

confidence: 99%

Petroleum Residue Upgrading Via Delayed Coking: A Review

et al. 2007

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getting burdened with heavy residues that are subsequently obtained by processing heavy crudes. Heavy crudes (≤ 20 ºAPI) yield large amount of residual fractions such as atmospheric residue (AR, initial boiling point, IBP > 343ºC) and vacuum residue (VR, IBP > 500ºC) as shown in Figure 1 (Boduszynski, 2002). The processes that convert these heavy ends into lighter, more value-added products are termed as bottom-of-the-barrel conversion processes or residue upgrading processes.Among the various processes available, the delayed coking process is a long-time workhorse as regards the bottom-of-thebarrel upgrading (Schulman et al., 1993). World coking capacity has reached about 210 MMTPA (Swaty, 2005), comprising India's World petroleum residue processing capacity has reached about 725 million metric tons per annum (MMTPA). The high demand for transportation fuels and the ever-rising heavy nature of crude oil have resulted in a renewed interest in the bottom-of-the-barrel processing using various conversion processes. Delayed coking, known for processing virtually any refi nery stream (which not only poses a serious threat to environment, but also involves a disposal cost) has garnered tremendous importance in the current refi ning scenario. Needle coke obtained from delayed coking process is a highly sought-after product, which is used in electric arc furnaces (in the form of graphite electrodes) in steel making applications. In the present communication, the published literature has been extensively analyzed and a state-of-the-art review has been written that includes: (1) importance and place of delayed coking as a residue upgrading process in the current refi ning scenario; (2) coking mechanism and kinetics; (3) design aspects; (4) feedstocks suitable for the production of needle coke; (5) characteristics of needle coke; (6) factors affecting needle coke quality and quantity; and (7) future market for needle coke. An attempt has been made to get the above-mentioned aspects together in a coherent theme so that the information is available at a glance and could be of signifi cant use for researchers and practising refi ners.La capacité de traitement des résidus pétroliers mondiaux a atteint environ 725 millions de tonnes métriques par année (MMTPA). La forte demande de carburants pour le transport et la nature de plus en plus lourde de l'huile brute ont renouvelé l'intérêt pour le traitement des résidus (fond de baril) à l'aide de divers procédés de conversion. La cokéfaction retardée, connue pour traiter virtuellement tout courant de raffi nage, qui non seulement constitue une menace sérieuse pour l'environnement, mais également implique des coûts d'élimination, a pris une importance considérable dans le scénario de raffi nage actuel. Le coke en aiguilles obtenu à partir du procédé de cokéfaction retardée est un produit très recherché, qui est employé dans les fours à arc électriques (sous la forme d'électrodes de graphite) dans les applications de fabrication de l'acier. Dans le présent article, on a analysé de m...

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“…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: 94%

“…The reaction rate equations are differential equations like Eqs. (4)(5)(6)(7)(8) that are solved by using the Runge-Kutta method. Fig.…”

Section: Case 1: Prediction Of Yields Of Productsmentioning

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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Composition and visbreakability of petroleum residues

Cited by 51 publications

References 2 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

Petroleum Residue Upgrading Via Delayed Coking: A Review

The Study of Molecular Modeling for Heavy Oil Thermal Cracking

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