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Jlassi, Khouloud; Chehimi, Mohamed M.; Sabu, Thomas

doi:10.1016/b978-0-323-46153-5.00001-x

Cited by 40 publications

(41 citation statements)

References 50 publications

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“…We argue that other parameters influencing the adsorption behavior of these shales are pore structure and clay content. Most clay minerals are stacked sheets of tetrahedral (T) and octahedral (O) layers . Two surface areas are usually reported for these clays: an internal surface relating to interlayer spaces and an external surface between particles.…”

Section: Discussionmentioning

confidence: 99%

Role of Organic Matter and Pore Structure on CO₂ Adsorption of Australian Organic-Rich Shales

Algazlan¹,

Pinetown

Saghafi

et al. 2022

Energy Fuels

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Carbon dioxide (CO2) injection into shale reservoirs is a potentially efficient technique to reduce greenhouse gas emissions while enhancing methane recovery. Despite research displaying a dominant role of organic matter (OM) in the adsorption behavior of shales, we show in this study that pore-size distribution and accessibility could be more important than merely having more OM. We assessed this hypothesis by conducting a combined set of experiments including (i) CO2 adsorption of Australian shale samples collected from Beetaloo, Perth, and Cooper basins before and after removing their OM using oxygen plasma ashing, at pressures up to 5.0 MPa and two temperatures (30 and 50 °C); (ii) CO2 adsorption of clay minerals (kaolinite, illite, and smectite) at the same pressures and temperatures; and (iii) X-ray diffraction (XRD), mercury injection capillary pressure (MICP), and focused ion beam scanning electron microscopy (FIB-SEM) to examine the effects of the samples' compositional and structural properties with CO2 adsorption. The results of this study highlighted the significant role of microporosity and pore structure/accessibility in the adsorption process of both shale’s organic and inorganic counterparts. Specifically, for the studied samples, it was found that (a) the calculated amount of CO2 adsorbed by OM separated from intact organic-shale samples is multiple times larger than the amount adsorbed by the intact organic-shale samples themselves (from which the OMs were removed); (b) the OM of the Beetaloo, which has higher pore-size distribution and volume than the OMs of the other two samples, adsorbed double the amount; (c) the positive correlation between shales’ adsorption capacity and TOC is mainly controlled by porosity and pore structure of the OM; (d) while shale samples reach their adsorption capacity at relatively low pressures, the adsorption process of clay minerals is faster at lower temperatures; (e) although montmorillonite has a higher total surface area than illite, both adsorb approximately the same amount suggesting that adsorption mostly occurs at external rather than internal clay surfaces; and (f) CO2 has a higher affinity to remain adsorbed in organic shales than in clays.

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Section: Discussionmentioning

confidence: 99%

Role of Organic Matter and Pore Structure on CO₂ Adsorption of Australian Organic-Rich Shales

Algazlan¹,

Pinetown

Saghafi

et al. 2022

Energy Fuels

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“…The structure of the clay consists of phyllosilicate sheets that are arranged properly to form structural layers. Individual layer is made by a stack of tetrahedral and octahedral sheets that shape the frame of all the clay mineral [8,9]. The tetrahedral (T) sheet consist of cations coordinated to four oxygen atoms and linked to adjacent tetrahedral by sharing three corners to form two dimensional hexagonal mesh [10].…”

Section: Structure Mineralogical and Physicochemical Composition Of mentioning

confidence: 99%

“…The second sheet is called octahedral sheet (O), which is comprised of six oxygen atoms which are closely parked together and hydroxyl ions in which cations are arranged to form octahedral coordination and linked to neighboring octahedral by sharing edge. The edge of shared octahedral forms sheet of hexagonal or pseudo hexagonal symmetry and shows different topologies depending on octahedral hydroxyl position [8]. Cations in octahedral sheet are usually Al 3+ , Fe 3+ , Mg 2+ or Fe 2+ .…”

Section: Structure Mineralogical and Physicochemical Composition Of mentioning

confidence: 99%

“…Type 2:1 clay minerals such as smectite and vermiculite possess higher specific surface area as compared type 1:1 clay minerals such as kaolinite and halloysite because of their ability to swell [10]. The total specific surface area of the clay is denoted by the sum of external surface area and the internal surface area corresponding to the interlayer spaces [8].…”

Section: Specific Surface Areamentioning

confidence: 99%

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Mineralogical and Chemical Characteristics of Raw and Modified Clays and Their Application in Arsenic and Fluoride Removal: Review

Gitari¹,

Mudzielwana²

2018

Current Topics in the Utilization of Clay in Industrial and Medical Applications

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Clay and clay minerals have always been used since the ancient times for making ceramic materials and also as a building material. Over the past decades, there has been a growing trend in their applicability in different areas such as industries, environmental remediation and water treatment sectors. The growing trend is mainly associated with the fact that they are chemically and mechanically stable, have higher specific surface area and cation exchange capacity. Furthermore, clays can be modified to improve their functionalities in different sectors. In this chapter, we present a review of the structural, mineralogical and chemical properties of clay and the effect of surface modification in their structures. We further looked at their applicability in arsenic and fluoride removal in their raw and also in their modified form. Although the literature showed that modified clay minerals yields higher adsorption capacity as compared to raw clays little nothing has been reported yet in relation to the cost of modifying clays with chemical species. As such new studies should also elaborate on the cost effectiveness of modifying clay minerals with chemical species.

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“…[16] There are lot more previous research works, which explicated the importance of nanoclay addition into the polymer and its outcomes. [17][18][19][20] There have been several articles discussing silane-treated fibers and fillers' involvement in the polymer matrix medium. However, while research on nanoclay-toughened epoxy composites based on sisal, flax, jute, and coir fibers has been completed in great detail, only a partial examination of the combination of ramie fiber with organically-modified montmorillonite (OMMT) nanoclay has been conducted.…”

Section: Introductionmentioning

confidence: 99%

Study of fiber delamination on silane modified ramie fiber/OMMTnano‐clay epoxy composite under low‐velocity impact, shear load, and high‐speeddrilling

et al. 2022

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In this present study, the effect of silane treated ramie fiber addition along with organically-modified montmorillonite (OMMT) nano clay in epoxy resin composite was investigated in drop load impact, shear loading, and high-speed drilling. The main aim of this research study was to develop a high-laminar shear strength epoxy structural composite for various engineering applications. To improve the laminar adhesion the fiber was treated using silane via acid hydrolysis technique. The OMMT nanoclay also added with fiber in order to improve the load bearing effect and adhesion phenomenon. The composites were prepared using hand layup method with postcuring. The adhesion behavior of composites was tested based on American society for testing and materials standards and compared. According to the results, the treated ramie fiber possesses high resistance to impact loading. The ballistic resistance of composite is increased three fold when compare with as-received fiber-epoxy composites. The interlaminar shear strength of composite designation C 1.5 gives highest shear strength of 35 MPa. The drilling study revealed highest dimensional stability for treated fiber. No fiber chip off and pull out at the drilled hole surface. The fractography analysis confirms no lamina delamination occurs even at high-speed drilling. These delamination resistance epoxy-based composites are suitable in automobile, structural and defense gadget manufacturing applications.

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Overview

Cited by 40 publications

References 50 publications

Role of Organic Matter and Pore Structure on CO₂ Adsorption of Australian Organic-Rich Shales

Role of Organic Matter and Pore Structure on CO₂ Adsorption of Australian Organic-Rich Shales

Mineralogical and Chemical Characteristics of Raw and Modified Clays and Their Application in Arsenic and Fluoride Removal: Review

Study of fiber delamination on silane modified ramie fiber/OMMTnano‐clay epoxy composite under low‐velocity impact, shear load, and high‐speeddrilling

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Overview

Cited by 40 publications

References 50 publications

Role of Organic Matter and Pore Structure on CO2 Adsorption of Australian Organic-Rich Shales

Role of Organic Matter and Pore Structure on CO2 Adsorption of Australian Organic-Rich Shales

Mineralogical and Chemical Characteristics of Raw and Modified Clays and Their Application in Arsenic and Fluoride Removal: Review

Study of fiber delamination on silane modified ramie fiber/OMMTnano‐clay epoxy composite under low‐velocity impact, shear load, and high‐speeddrilling

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Role of Organic Matter and Pore Structure on CO₂ Adsorption of Australian Organic-Rich Shales

Role of Organic Matter and Pore Structure on CO₂ Adsorption of Australian Organic-Rich Shales