FTIR, XRF, XRD and SEM characteristics of Permian shales, India

Hazra, Bodhisatwa; Varma, Atul Kumar; Bandopadhyay, Anup Kumar; Chakravarty, Sanchita; Buragohain, J.; Samad, Suresh Kumar; Prasad, Anup K.

doi:10.1016/j.jngse.2016.03.098

Cited by 68 publications

(33 citation statements)

References 64 publications

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“…The morphology of starch granules was observed by a scanning electron microscope (QUANTAFEG250, FEI, USA) at 2,000× magnifications according to the method of Hazra et al (). All samples were dried at 40°C for 12 hr, mounted on a scanning electron microscope stub with conductive double‐sided adhesive and then treated with a gold spray before observation.…”

Section: Methodsmentioning

confidence: 99%

Preparation of octenyl succinic anhydride‐modified cassava starch by the ultrasonic‐assisted method and its influence mechanism

Zhang

Yu²,

Ding

et al. 2019

J Food Process Preserv

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As an effective physical method for starch modification, ultrasonic treatment can significantly improve the chemical activity and quality of starch, but its mechanism needs to be further investigated. In this paper, ultrasonic‐modified cassava starch and octenyl succinic anhydride (OSA)‐modified cassava starch with low degree of substitution were prepared under ultrasonic conditions. The effects of ultrasound on the structure and properties of native cassava starch and the quality of OSA‐modified cassava starch were studied. The results showed that the crystallinity decreased from 30.7% to 26.4%, the reaction efficiency increased from 62.28% to 66.20%, and other characteristics also changed after 1 min of ultrasonic treatment. While the structure and properties of cassava starch changed differently after ultrasonic treatments for 8 min and 32–60 min. Consequently, these changes showed that ultrasonic treatment had a significant mechanochemical effect on starch granules. The quality of OSA‐modified cassava starch was improved significantly and its influence mechanism was analyzed by the mechanochemistry theory. Practical applications During the esterification of starch, the dense arrangement of crystalline regions limits the reaction of esterifying agents with starch granules. This study showed that ultrasound exerted strong mechanical forces on starch granules, which promoted the production of free radicals and increased the free energy of starch molecules. Besides, the increase of mechanochemical active sites in starch granules was conducive to the homogeneous reaction of octenyl succinic anhydride (OSA) and starch molecules. Therefore, the quality of OSA‐modified cassava starch prepared by ultrasonic‐assisted treatment was significantly improved. This study provides a reference for the application of ultrasonic technology in other fields and also lays a theoretical basis for the industrial development of high performance‐modified starch.

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Section: Methodsmentioning

confidence: 99%

Preparation of octenyl succinic anhydride‐modified cassava starch by the ultrasonic‐assisted method and its influence mechanism

Zhang

Yu²,

Ding

et al. 2019

J Food Process Preserv

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“…5) to an unexplored hydrocarbon prospects in the basin. These argillaceous thickly laminated units are deposited in a lacustrine, low and quite energy environment (Liu et al 2015;Hazra et al 2016). These sediments also have evidence of itchnofacies supporting the availability of preserved organic matter.…”

Section: Hydrocarbon Prospectivity Of Tanga Onshore Basinmentioning

confidence: 99%

An overview of the geology of Tanga onshore basin: implication for hydrocarbon potential, Tanzania, East Africa

Mvile

Abu

Osinowo

et al. 2020

J. Sediment. Environ.

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Tanzania, like other East African countries, is seeking to increase its hydrocarbon discoveries from both onshore and offshore sedimentary basins. Although the Tanga onshore basin has the potential of adding to the hydrocarbon reserve of the country, it has very scanty literature to guide preliminary investigations into the basin prospectivity. This review seeks to highlight the petroleum system elements within the basin and how worthy it is exploring for its hydrocarbons potential. The general geology of the basin seems to have characteristics of a complete petroleum system with dolomitic limestone as source rocks and an obvious shale source rock and evidences of fossils and oil seepage around Kivundo River, although further research is needed to validate this assumption. Feldspathic sandstones are present to serve as a reservoir to economic hydrocarbon reserves. The basin has suitable thickness to provide the needed temperature and pressure for thermal maturity of any existing organic matter (OM) and to expel them from their various 'kitchens'. Brittle structures are available to facilitate the migration of expelled kerogens. Structural straps are available via micro-folds and faults, to ensure accumulation of economic quantities that could be explored and exploited at profit. Also, the Tanga onshore basin has geological analogies that are similar to other basins' hydrocarbon discoveries including that in Rovuma, Morondava and Songo Songo basins which are to the south of Tanga onshore basin.

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“…The strong peaks at 2924 and 2854 cm À1 represented the asymmetric and symmetric stretching of the C-H bond of the methylene groups, respectively. 38,39 The absorption peaks at 1458 and 1378 cm À1 were attributed to the symmetric bending of the methyl groups, 40 suggesting that large amounts of aliphatic alkyl groups were present in the residual oil. The breakdown of naphthenic bridges in these groups may lead to the reduction of the S content in heavy oils.…”

Section: Oil Product Characterizationmentioning

confidence: 99%

Generation of hydrogen sulfide during the thermal enhanced oil recovery process under superheated steam conditions

Yang

Zhang

et al. 2019

RSC Adv.

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FTIR, XRF, XRD and SEM characteristics of Permian shales, India

Cited by 68 publications

References 64 publications

Preparation of octenyl succinic anhydride‐modified cassava starch by the ultrasonic‐assisted method and its influence mechanism

Preparation of octenyl succinic anhydride‐modified cassava starch by the ultrasonic‐assisted method and its influence mechanism

An overview of the geology of Tanga onshore basin: implication for hydrocarbon potential, Tanzania, East Africa

Generation of hydrogen sulfide during the thermal enhanced oil recovery process under superheated steam conditions

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