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  1. Article ; Online: Mesoporous superacid catalysts for valorisation of refinery naphtha stream.

    Mehla, Sunil / Krishsna, Vamsi / Sriganesh, Gandham / Ravishankar, Raman

    RSC advances

    2018  Volume 8, Issue 59, Page(s) 33702–33709

    Abstract: In the current petroleum refining scenario, many refineries end up with surplus naphtha which is either absorbed into the gasoline pool or exported at unattractive prices. Therefore, several options for naphtha valorisation are currently being explored. ... ...

    Abstract In the current petroleum refining scenario, many refineries end up with surplus naphtha which is either absorbed into the gasoline pool or exported at unattractive prices. Therefore, several options for naphtha valorisation are currently being explored. The usage of Liquified Petroleum Gas (LPG) as a fuel in heating appliances, cooking equipment and automobiles is rapidly increasing. The high specific calorific value, high octane number, clean and efficient combustion of LPG distinguish it as an extremely promising fuel of the future. In the current work, tungstophosphoric acid (TPA) supported on four different mesoporous silica supports were investigated as mesoporous superacids for hydroconversion of refinery naphtha using
    Language English
    Publishing date 2018-10-02
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/c8ra07024e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Xylitol based phase selective organogelators for potential oil spillage recovery

    Kesava Raju, Chinthalapati Siva / Pramanik, Bhaskar / Ravishankar, Raman / Chalapathi Rao, Peddy Venkat / Sriganesh, Gandham

    RSC advances. 2017 July 26, v. 7, no. 59

    2017  

    Abstract: Xylitol based phase selective organogelators are developed for crude oil of varying API gravity and various petroleum fractions/oils. Intermolecular hydrogen bonding was responsible for gel formation with three dimensional cross linked networks. ... ...

    Abstract Xylitol based phase selective organogelators are developed for crude oil of varying API gravity and various petroleum fractions/oils. Intermolecular hydrogen bonding was responsible for gel formation with three dimensional cross linked networks. Efficient gelation at room temperature, high mechanical strength, oil recovery and gelator reusability make these compounds promising candidates for oil spill mitigation.
    Keywords ambient temperature ; crosslinking ; gelation ; gels ; hydrogen bonding ; oil spills ; oils ; petroleum ; strength (mechanics) ; xylitol
    Language English
    Dates of publication 2017-0726
    Size p. 37175-37180.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c7ra06898k
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Low molecular weight gels: potential in remediation of crude oil spillage and recovery

    Kesava Raju, Ch. Siva / Pramanik, Bhaskar / Kar, Tanmoy / Rao, Peddy V. C / Choudary, Nettem V / Ravishankar, Raman

    RSC advances. 2016 June 01, v. 6, no. 58

    2016  

    Abstract: A novel amino acid based gelator compound was developed for the phase-selective gelation of hydrocarbon solvents in a biphasic mixture with water/sea water including crude oils. With the crude oils of varying API gravity ranging from 18.7 to 40.5, the ... ...

    Abstract A novel amino acid based gelator compound was developed for the phase-selective gelation of hydrocarbon solvents in a biphasic mixture with water/sea water including crude oils. With the crude oils of varying API gravity ranging from 18.7 to 40.5, the organogelator exhibited an uptake capacity ranging from 50 to 100 times. Thus, a wide range of applicabilities of the gelator to contain and mitigate oil spills of any type of crude oil covering the entire crude basket around the globe is proven for the first time.
    Keywords amino acids ; gelation ; gels ; molecular weight ; oil spills ; petroleum ; remediation ; seawater ; solvents
    Language English
    Dates of publication 2016-0601
    Size p. 53415-53420.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c6ra10462b
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  4. Article: Microbial rhamnolipid production in wheat straw hydrolysate supplemented with basic salts

    Prabu, Rajagopalan / Choudary, Nettem V / Kuila, Arindam / Rao, Peddy V. C / Ravishankar, Raman / Velankar, Harshad R

    RSC advances. 2015 June 11, v. 5, no. 64

    2015  

    Abstract: Rhamnolipids are important glycolipids that find application in the areas of crude oil bioremediation, enhanced oil recovery, food and pharmaceutical applications. The economic feasibility of rhamnolipid production mainly depends upon the cost of the ... ...

    Abstract Rhamnolipids are important glycolipids that find application in the areas of crude oil bioremediation, enhanced oil recovery, food and pharmaceutical applications. The economic feasibility of rhamnolipid production mainly depends upon the cost of the substrate. Lignocellulosic biomass is a potential substrate for the production of several microbial metabolites and can also be used for rhamnolipid production. For the utilization of sugars from lignocellulosic biomass, the polymeric carbohydrates need to be hydrolysed for releasing the fermentable sugars for rhamnolipid production. In this study, pretreatment of wheat straw was carried out using sulphuric acid, phosphoric acid and ammonia. All the pretreated substrates were subjected to enzymatic hydrolysis using cellulases, produced by Trichoderma reesei NCIM 1186. Maximum reducing sugar yield (509.33 mg g−1 dry pretreated substrate) was obtained in the case of biomass treated with 0.2% sulphuric acid at 150 °C for 15 min which was further used for rhamnolipid production by Pseudomonas aeruginosa NCIM 2036. The highest rhamnolipid production of 9.38 g L−1 was obtained in sugar hydrolysate (mainly containing cellobiose) supplemented with MgSO4, Na2HPO4, FeSO4 and NaNO3. The production of rhamnolipid by P. aeruginosa NCIM 2036 using pure cellobiose as the sole carbon source was demonstrated. The current study showed that lignocellulosic biomass can be used as an alternative cost-effective substrate for rhamnolipid production.
    Keywords ammonia ; biomass ; bioremediation ; carbon ; cellobiose ; cellulases ; cost effectiveness ; economic feasibility ; enzymatic hydrolysis ; ferrous sulfate ; hydrolysates ; hydrolysis ; lignocellulose ; magnesium sulfate ; metabolites ; oils ; petroleum ; phosphoric acid ; polymers ; Pseudomonas aeruginosa ; reducing sugars ; rhamnolipids ; sodium nitrate ; sodium phosphate ; sulfuric acid ; Trichoderma reesei ; wheat straw
    Language English
    Dates of publication 2015-0611
    Size p. 51642-51649.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c5ra05800g
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Tailored Alkene Oligomerization with H-ZSM-57 Zeolite.

    Martens, Johan A / Ravishankar, Raman / Mishin, Igor E / Jacobs, Pierre A

    Angewandte Chemie (International ed. in English)

    2000  Volume 39, Issue 23, Page(s) 4376–4379

    Language English
    Publishing date 2000-12-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/1521-3773(20001201)39:23<4376::AID-ANIE4376>3.0.CO;2-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Zeosil Nanoslabs: Building Blocks in nPr(4)N(+)-Mediated Synthesis of MFI Zeolite C.E.A.K., J.A.M., and P.A.J. acknowledge the Belgian Government for sponsoring in the frame of IUAP-PAI program. J.A.M. and P.A.J. acknowledge FWO Vlaanderen for a research grant.

    Kirschhock, Christine E. A. / Buschmann, Véronique / Kremer, Sebastien / Ravishankar, Raman / Houssin, Christophe J. Y. / Mojet, Barbara L. / van Santen, Rutger A. / Grobet, Piet J. / Jacobs, Pierre A. / Martens, Johan A.

    Angewandte Chemie (International ed. in English)

    2001  Volume 40, Issue 14, Page(s) 2637–2640

    Language English
    Publishing date 2001-07-16
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Zeosil Nanoslabs: Building Blocks in nPr

    Kirschhock, Christine E A / Buschmann, Véronique / Kremer, Sebastien / Ravishankar, Raman / Houssin, Christophe J Y / Mojet, Barbara L / van Santen, Rutger A / Grobet, Piet J / Jacobs, Pierre A / Martens, Johan A

    Angewandte Chemie (International ed. in English)

    2001  Volume 40, Issue 14, Page(s) 2637–2640

    Abstract: Tetrapropylammonium (TPA)-containing precursors are the building blocks in the crystallization of silica. In the first steps slab-shaped silicalite nanoparticles are formed by ordered combination of the precursors. These nanoslabs have MFI-type zeolite ... ...

    Abstract Tetrapropylammonium (TPA)-containing precursors are the building blocks in the crystallization of silica. In the first steps slab-shaped silicalite nanoparticles are formed by ordered combination of the precursors. These nanoslabs have MFI-type zeolite framework topology and play a key role in TPA-ion-mediated zeolite crystallization from monomeric and polymeric silica sources.
    Language English
    Publishing date 2001-07-16
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/1521-3773(20010716)40:14<2637::AID-ANIE2637>3.0.CO;2-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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