Petroleum residue upgradation via visbreaking / Jyeshtharaj B. Joshi in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 8960–8988 Titre : Petroleum residue upgradation via visbreaking : a review Type de document : texte imprimé Auteurs : Jyeshtharaj B. Joshi, Auteur ; Aniruddha B. Pandit, Auteur ; Rohit P. Kulkarni, Auteur Année de publication : 2009 Article en page(s) : p. 8960–8988 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Petroleum residue Upgradation Visbreaking Résumé : World petroleum residue processing capacity has reached about 810 MMTPA. In the present petroleum refining scenario, the viability of a petroleum refinery strongly depends on the flexibility of processing heavy crudes and, in turn, heavy residues. Visbreaking is one of the major residue upgrading processes and constitutes about 33% of the total residue processing capacity. In the present communication, the published literature pertaining to the visbreaking process has been extensively analyzed and a state-of-the-art review has been written that includes the following: (i) the effect of feed properties on fuel oil stability; (ii) reaction pathways, mechanism, and kinetics; (iii) parametric sensitivity of the operating variables such as temperature, pressure, and residence time; (iv) different visbreaker designs, viz. coil visbreaker, coil-soaker visbreaker, soaker with internals, and high conversion soaker; (v) coking and fouling; (vi) estimation of design parameters, viz. gas holdup in high-pressure bubble column (soaker), gas holdup in sectionalized bubble column (soaker with internals), liquid-phase mixing and axial mixing in high-pressure bubble column, liquid-phase mixing and axial mixing in sectionalized bubble column, and weeping; and (vii) mathematical modeling of visbreaker, which mainly includes the coil and the soaker. An attempt has been made to get the aforementioned aspects together in a coherent manner so that the information is available at a glance and is expected to be useful to researchers and practicing refiners. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0710871#afn1 [article] Petroleum residue upgradation via visbreaking : a review [texte imprimé] / Jyeshtharaj B. Joshi, Auteur ; Aniruddha B. Pandit, Auteur ; Rohit P. Kulkarni, Auteur . - 2009 . - p. 8960–8988. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 8960–8988 Mots-clés : Petroleum residue Upgradation Visbreaking Résumé : World petroleum residue processing capacity has reached about 810 MMTPA. In the present petroleum refining scenario, the viability of a petroleum refinery strongly depends on the flexibility of processing heavy crudes and, in turn, heavy residues. Visbreaking is one of the major residue upgrading processes and constitutes about 33% of the total residue processing capacity. In the present communication, the published literature pertaining to the visbreaking process has been extensively analyzed and a state-of-the-art review has been written that includes the following: (i) the effect of feed properties on fuel oil stability; (ii) reaction pathways, mechanism, and kinetics; (iii) parametric sensitivity of the operating variables such as temperature, pressure, and residence time; (iv) different visbreaker designs, viz. coil visbreaker, coil-soaker visbreaker, soaker with internals, and high conversion soaker; (v) coking and fouling; (vi) estimation of design parameters, viz. gas holdup in high-pressure bubble column (soaker), gas holdup in sectionalized bubble column (soaker with internals), liquid-phase mixing and axial mixing in high-pressure bubble column, liquid-phase mixing and axial mixing in sectionalized bubble column, and weeping; and (vii) mathematical modeling of visbreaker, which mainly includes the coil and the soaker. An attempt has been made to get the aforementioned aspects together in a coherent manner so that the information is available at a glance and is expected to be useful to researchers and practicing refiners. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0710871#afn1

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Visbreaking studies in the presence of soaker internals / Rohit P. Kulkarni in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11221–11231 Titre : Visbreaking studies in the presence of soaker internals Type de document : texte imprimé Auteurs : Rohit P. Kulkarni, Auteur ; Aniruddha B. Pandit, Auteur ; Jyeshtharaj B. Joshi, Auteur Année de publication : 2011 Article en page(s) : pp. 11221–11231 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Visbreaking Résumé : Coil-soaker visbreaking is a well-proven technology in terms of lower capital investment, lower operating cost, and low susceptibility to operational upsets. A significant improvement in the performance of this technology can be achieved by incorporating suitable internals in the soaker. In the present work, visbreaking studies using vacuum residues obtained from Indian refineries were performed in a pilot plant equipped with soaker. The soaker was retrofitted with a set of in-house-developed internals. Two different configurations of internals along with a benchmark case of soaker without internals were studied for three vacuum residue feeds. The coil outlet temperature was varied in the range of 410−440 °C, while the soaker outlet pressure was maintained constant at 1.2 MPa. The resulting visbroken products, namely, gas (G, C1−C4), gasoline (60−150 °C), light gas oil (LGO, 150−350 °C), vacuum gas oil (VGO, 350−500 °C), and vacuum residue (VR, lumped product consisting of compounds with normal boiling point above 500 °C [500 °C+]) were quantified and characterized in detail. The effect of internals has been studied on the conversion and the selectivity of the visbreaking reactions. The work brings out the advantages of internals in the visbreaking technology. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901954z [article] Visbreaking studies in the presence of soaker internals [texte imprimé] / Rohit P. Kulkarni, Auteur ; Aniruddha B. Pandit, Auteur ; Jyeshtharaj B. Joshi, Auteur . - 2011 . - pp. 11221–11231. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11221–11231 Mots-clés : Visbreaking Résumé : Coil-soaker visbreaking is a well-proven technology in terms of lower capital investment, lower operating cost, and low susceptibility to operational upsets. A significant improvement in the performance of this technology can be achieved by incorporating suitable internals in the soaker. In the present work, visbreaking studies using vacuum residues obtained from Indian refineries were performed in a pilot plant equipped with soaker. The soaker was retrofitted with a set of in-house-developed internals. Two different configurations of internals along with a benchmark case of soaker without internals were studied for three vacuum residue feeds. The coil outlet temperature was varied in the range of 410−440 °C, while the soaker outlet pressure was maintained constant at 1.2 MPa. The resulting visbroken products, namely, gas (G, C1−C4), gasoline (60−150 °C), light gas oil (LGO, 150−350 °C), vacuum gas oil (VGO, 350−500 °C), and vacuum residue (VR, lumped product consisting of compounds with normal boiling point above 500 °C [500 °C+]) were quantified and characterized in detail. The effect of internals has been studied on the conversion and the selectivity of the visbreaking reactions. The work brings out the advantages of internals in the visbreaking technology. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901954z

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