Micropore characterization using the Dubinin-Astakhov equation to analyze high pressure CO2 (273 K) adsorption data

Ghosal, Ranjan; Smith, Douglas M.

doi:10.1007/bf01137914

Cited by 20 publications

(12 citation statements)

References 19 publications

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“…The Dubinin-Astakhov equation can be used to linearise adsorption data that generate curved Dubinin-Astakhov plots. Micropore volumes found using the Dubinin-Astakhov equation agreed with the total volume generated by the N 2 adsorption method which occurs at -196°C for all activated carbon studies (Ghosal & Smith, 1996).…”

Section: Surface Area Determinationsupporting

confidence: 67%

Adsorption of Perfluoroalkyl Compounds onto Microporous Agave Sisalana Activated Carbon Fibre

2019

SETWM-19, ACBES-19, EEHSS-19 Nov. 18-19, 2019 Johannesburg (South Africa)

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Perfluoroalkyl compounds (PFCs) have been shown to cause harmful effects on the environment and human health. A major concern is their wide range of uses in consumer products which have been detected in food and drinking water. The study reported the removal of these contaminants using a microporous activated carbon fibre (ACF) made from an indigenous plant, Agave sisalana, widely available across sub-Saharan Africa, by using electro-physicochemical methods. An electro-physicochemical adsorption regime was designed, to facilitate the rapid adsorption of PFOS and PFOA from contaminated drinking water in an electrolytic cell. Initially, adsorption studies (n = 48) using sonication (20 kHz) in batch systems indicated efficient removal of PFOA and PFOS within 120 min, with numerous samples (n = 14) achieving complete removal for both PFOA and PFOS. The minimum removal rates observed were 65.55% for PFOA and 95.92% for PFOS.

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Section: Surface Area Determinationsupporting

confidence: 67%

Adsorption of Perfluoroalkyl Compounds onto Microporous Agave Sisalana Activated Carbon Fibre

2019

SETWM-19, ACBES-19, EEHSS-19 Nov. 18-19, 2019 Johannesburg (South Africa)

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“…The surface area was calculated using the BET equation (Brunauer et al, 1938;Gregg and Sing, 1982) and a relative pressure range between 0.05 and 0.20, and the mesopore volume was calculated using the BJH equation (Barret et al, 1951). The carbon dioxide adsorption isotherms were obtained at 273.1°K in the relative pressure (P/P o ) range of 10 − 5 -3.2 × 10 − 2 (Clarkson and Bustin, 1996;Ghosal and Smith, 1996;Ross and Bustin, 2009). The micropore volume was calculated using the Dubinin-Radushkevich (D-R) equation (G.R.…”

Section: Low Pressure Adsorptionmentioning

confidence: 99%

A preliminary study on the characterization and controlling factors of porosity and pore structure of the Permian shales in Lower Yangtze region, Eastern China

Pan

Xiao

Tian

et al. 2015

International Journal of Coal Geology

112

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“…A low-pressure CO 2 adsorption isotherm was used to characterize the micropores (<2 nm). This type of analysis was performed at 273 K with a relative pressure P/P 0 ranging from 0.00003 to 0.03 (Ghosal and Smith, 1996). CO 2 adsorption data were interpreted using the Brunauer-Emmett-Teller (BET) and Langmuir models.…”

Section: Low-pressure Co 2 and N 2 Adsorptionmentioning

confidence: 99%

Evolution characteristics and model of nanopore structure and adsorption capacity in organic-rich shale during artificial thermal maturation: A pyrolysis study of the Mesoproterozoic Xiamaling marine shale with type II kerogen from Zhangjiakou, Hebei, China

Wang

Liu

et al. 2018

Energy Exploration & Exploitation

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Thermal maturity has a considerable impact on hydrocarbon generation, mineral conversion, nanopore structure, and adsorption capacity evolution of shale, but that impact on organic-rich marine shales containing type II kerogen has been rarely subjected to explicit and quantitative characterization. This study aims to obtain information regarding the effects of thermal maturation on organic matter, mineral content, pore structure, and adsorption capacity evolution of marine shale. Mesoproterozoic Xiamaling immaturity marine oil shale with type II kerogen in Zhangjiakou of Hebei, China, was chosen for anhydrous pyrolysis to simulate the maturation process. With increasing simulation temperature, hydrocarbon generation and mineral transformation promote the formation, development, and evolution of pores in the shale. The original and simulated samples consist of closed microspores and one-end closed pores of the slit throat, all-opened wedge-shaped capillaries, and fractured or lamellar pores, which are related to the plate particles of clay. The increase in maturity can promote the formation and development of pores in the shale. Heating can also promote the accumulation, formation, and development of pores, leading to a large pore volume and surface area. The temperature increase can promote the development of pore volume and surface area of 1–10 and 40-nm diameter pores. The formation and development of pore volume and surface area of 1–10 nm diameter pores are more substantial than that of 40-nm diameter pores. The pore structure evolution of the sample can be divided into pore adjustment (T < 350°C, EqRo < 0.86%), development (350°C < T < 650°C, 0.86% < EqRo < 3.28%), and conversion or destruction stages (T > 650°C, EqRo > 3.28%). Along with the increase in maturity, the methane adsorption content decreases in the initial simulation stage, increases in the middle simulation stage, and reaches the maximum value at 650°C, after which it gradually decreases. A general evolution model is proposed by combining the nanopore structure and the adsorption capacity evolution characteristics of the oil shale.

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Micropore characterization using the Dubinin-Astakhov equation to analyze high pressure CO2 (273 K) adsorption data

Cited by 20 publications

References 19 publications

Adsorption of Perfluoroalkyl Compounds onto Microporous Agave Sisalana Activated Carbon Fibre

Adsorption of Perfluoroalkyl Compounds onto Microporous Agave Sisalana Activated Carbon Fibre

A preliminary study on the characterization and controlling factors of porosity and pore structure of the Permian shales in Lower Yangtze region, Eastern China

Evolution characteristics and model of nanopore structure and adsorption capacity in organic-rich shale during artificial thermal maturation: A pyrolysis study of the Mesoproterozoic Xiamaling marine shale with type II kerogen from Zhangjiakou, Hebei, China

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