Pore geometrical complexity and fractal facets of Permian shales and coals from Auranga Basin, Jharkhand, India

Mishra, Divya Kumari; Samad, Suresh Kumar; Varma, Atul Kumar; Mendhe, Vinod Atmaram

doi:10.1016/j.jngse.2018.01.014

Cited by 62 publications

(66 citation statements)

References 107 publications

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“…All of the CPD samples exhibited H2 type hysteresis loops, where the pore size and pore shape distribution were difficult to interpret well. According to the literature [25,26,27], the H2 loop with the steeper desorption slope than the adsorption slope occurred in the network of the ink-bottle pores. This meant that the cellulose fibers cell walls were partially collapsed and then the narrow pore necks and the wide pore body were interconnected during the CPD procedure.…”

Section: Resultsmentioning

confidence: 99%

Critical Point Drying: An Effective Drying Method for Direct Measurement of the Surface Area of a Pretreated Cellulosic Biomass

et al. 2018

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Abstract:The surface area and pore size distribution of Eucalyptus samples that were pretreated by different methods were determined by the Brunauer-Emmett-Teller (BET) technique. Three methods were applied to prepare cellulosic biomass samples for the BET measurements, air, freeze, and critical point drying (CPD). The air and freeze drying caused a severe collapse of the biomass pore structures, but the CPD effectively preserved the biomass morphology. The surface area of the CPD prepared Eucalyptus samples were determined to be 58-161 m 2 /g, whereas the air and freeze dried samples were 0.5-1.3 and 1.0-2.4 m 2 /g, respectively. The average pore diameter of the CPD prepared Eucalyptus samples were 61-70 Å. The CPD preserved the Eucalyptus sample morphology by replacing water with a non-polar solvent, CO 2 fluid, which prevented hydrogen bond reformation in the cellulose.

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Section: Resultsmentioning

confidence: 99%

Critical Point Drying: An Effective Drying Method for Direct Measurement of the Surface Area of a Pretreated Cellulosic Biomass

et al. 2018

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“…A factor (>0.664) and C factor (>0.501) value of studied samples demonstrate that samples have moderate aromatic and aliphatic hydrocarbon (Yao, Zhang et al 2011, Chen, Mastalerz et al 2012. A factor and C factor indicate that types II and III kerogen present in investigated samples (Varma, Khatun et al 2015, Varma, Mishra et al 2018, Misra, Das et al 2020. A similar result found from the plot between atomic H/C and O/C of the coal samples demonstrates that the samples lie in the kerogen types II and III consecutively (Akanksha, Singh et al 2017, Akanksha, Singh et al 2020.…”

Section: Ftir Studiesmentioning

confidence: 81%

“…The "A" factor and "C" factor can be easily determined by the following equation as given below (Varma, Mishra et al 2018). (5) It was described in different studies that as the A-factor value increases, the maturity decreases and the aliphatic nature increases in coal (Durand and Espitalié 1976, Lis, Mastalerz et al 2005, Esen, Özer et al 2020.…”

Section: Ftir Studiesmentioning

confidence: 99%

“…The different ranks of coal, maceral composition, and mineral matter significantly influence the methane sorption capacity (Moore, Bowe et al 2014, Goraya, Rajpoot et al 2019. Literature reveals that Fourier transform infrared spectroscopy (FTIR) is extensively employed to characterize various source rock to determine hydrocarbon generation potential (Ganz and Kalkreuth 1991, Mishra, Samad et al 2018, Varma, Mishra et al 2018.…”

Section: Introductionmentioning

confidence: 99%

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Petrophysical Investigation of Hydrocarbon Generation Potential of Coal from Raniganj Basin, India

Panwar¹,

Chaurasia

Saxena

et al. 2021

Preprint

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Methane content in a coal seam is a necessary parameter for evaluating coal bed gas, and it is a threat to underground coal mining activities from environmental aspects. Keeping in pace with comprehensive studies of coal bed gas, the authors had selected 12 coal samples from the Sitarampur block of Raniganj Coalfield. The Petrographic examination illustrated that significant values of reactive macerals present in samples demonstrate that organic matter is dominated by kerogen Type III, making it suitable for hydrocarbon generation. “A” factor (aliphatic/aromatic bands) and “C” factor (carbonyl/carboxyl bands) value concluded that the sample has the lowest aromaticity and the highest hydrocarbon-generating potential, which also validated by the cross plot between atomic H/C and O/C. The plots between the H/C and O/C ratio in the Van Krevelen diagram indicate that the coal samples lie in the type III kerogen, and bituminous coal (gas prone zone) is present in the block, which confirmed by the cross plot between desorbed and total gas (cc/g). The in-situ gas content values are high enough to produce methane from coal beds. The overall study concludes that the Sitarampur block from Raniganj Coalfield is suitable for hydrocarbon generation and extraction.

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“…The different ranks of coal, mineral matter and maceral composition significantly influence the methane sorption capacity (Goraya et al 2019;Moore et al 2014). The literature reveals that Fourier transform infrared spectroscopy (FTIR) is extensively employed to characterize various source rocks to determine hydrocarbon generation potential (Ganz and Kalkreuth 1991;Mishra et al 2018;Varma et al 2018). The FE-SEM and EDX analysis were significantly used for organic matter association with mineral matter and coal surface structure.…”

Section: Introductionmentioning

confidence: 99%

Geochemical investigation of hydrocarbon generation potential of coal from Raniganj Basin, India

Panwar

Chaurasia

Saxena

et al. 2021

J Petrol Explor Prod Technol

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Methane content in a coal seam is a necessary parameter for evaluating coal bed gas, and it poses an environmental risk to underground coal mining activities. Keeping in pace with comprehensive studies of coal bed gas, 12 coal samples were selected from the Sitarampur block of Raniganj Coalfield for analysis. The Petrographic examination illustrated that significant values of reactive macerals present in samples demonstrate that organic matter is dominated by the prominent source of aromatic hydrocarbons with a minor proportion of aliphatic hydrocarbon, which falls in the region of (Type III) kerogen, confirms the suitability for the potential of hydrocarbon generation. “A” factor (aliphatic/aromatic bands) and “C” factor (carbonyl/carboxyl bands) value concluded that the sample has the lowest aromaticity and the highest hydrocarbon-generating potential, which was also validated by the Van Krevelen diagram. The Van Krevelen diagram plots between the H/C and O/C ratio indicate that coal samples lie in the type III kerogen, and bituminous coal (gas prone zone) is present in the block, which is confirmed by the cross-plot between desorbed and total gas (cc/g). The in situ gas content values are high enough to produce methane from coal beds. The overall study concludes that the Sitarampur block from Raniganj Coalfield is suitable for hydrocarbon generation and extraction.

show abstract

Pore geometrical complexity and fractal facets of Permian shales and coals from Auranga Basin, Jharkhand, India

Cited by 62 publications

References 107 publications

Critical Point Drying: An Effective Drying Method for Direct Measurement of the Surface Area of a Pretreated Cellulosic Biomass

Critical Point Drying: An Effective Drying Method for Direct Measurement of the Surface Area of a Pretreated Cellulosic Biomass

Petrophysical Investigation of Hydrocarbon Generation Potential of Coal from Raniganj Basin, India

Geochemical investigation of hydrocarbon generation potential of coal from Raniganj Basin, India

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