Baseline studies of the clay minerals society special clays: Specific surface area by the Brunauer Emmett Teller (BET) method

Doğan, Murat; Doğan, A. Umran; Yesilyurt, F. Irem; Alaygut, Dogan; Buckner, Ira S.; Wurster, Dale Eric

doi:10.1346/ccmn.2007.0550508

Cited by 64 publications

(40 citation statements)

References 38 publications

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“…The BET surface areas for Ca-and Na-montmorillonite measured in this study are credible based on comparison with the BET surface areas (24.7-97 m 2 /g) of montmorillonite previously measured [11,[69][70][71][72][73]. For illite and kaolinite, the BET surface areas (19.738 m 2 /g and 12.271 m 2 /g, respectively) decrease progressively but are larger than that of illite (17.5 m 2 /g) [74] and kaolinite (13.0 m 2 /g) [44]. Ripidolite (4.922 m 2 /g) has a slightly higher specific surface area than cookeite (3.242 m 2 /g) and is similar to chlorite with an A BET of 4.8 m 2 /g as measured by Ross and Bustin [72].…”

Section: Microscopic Parameters Of Pores In Clay Mineralssupporting

confidence: 78%

Adsorption Properties of Hydrocarbons (n-Decane, Methyl Cyclohexane and Toluene) on Clay Minerals: An Experimental Study

Zhang

et al. 2017

Energies

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Adsorption of hydrocarbons may significantly affect hydrocarbon migration in unconventional reservoirs. Clay minerals form the primary adsorbent surfaces for hydrocarbons adsorbed in mudstone/shale. To study the adsorption properties of hydrocarbons (n-decane (C 10 H 22 ), methyl cyclohexane (C 7 H 14 ) and toluene (C 7 H 8 )) on clay minerals (i.e., cookeite, ripidolite, kaolinite, illite, illite/smectite mixed-layer, Na-montmorillonite and Ca-montmorillonite), hydrocarbon vapor adsorption (HVA) tests were conducted at 298.15 K. The results showed that (i) the adsorption amounts of C 10 H 22 , C 7 H 14 and C 7 H 8 ranged from 0.45-1.03 mg/m 2 , 0.28-0.90 mg/m 2 and 0.16-0.53 mg/m 2 , respectively; (ii) for cookeite, ripidolite and kaolinite, the adsorption capacity of C 10 H 22 was less than C 7 H 14 , which was less than C 7 H 8 ; (iii) for illite, Na-montmorillonite and Ca-montmorillonite, the adsorption capacity of C 10 H 22 was greater than that of C 7 H 8 , and the adsorption capacity of C 7 H 14 was the lowest; (iv) for an illite/smectite mixed-layer, C 7 H 14 had the highest adsorption capacity, followed by C 10 H 22 , and C 7 H 8 had the lowest capacity. Adsorption properties were correlated with the microscopic parameters of pores in clay minerals and with experimental pressure. Finally, the weighted average method was applied to evaluate the adsorption properties of C 10 H 22 , C 7 H 14 and C 7 H 8 on clay minerals in oil-bearing shale from the Shahejie Formation of Dongying Sag in the Bohai Bay Basin, China. For these samples, the adsorbed amounts of C 7 H 14 ranged from 18.03-28.02 mg/g (mean 23.33 mg/g), which is larger than that of C 10 H 22 , which ranges from 15.40-21.72 mg/g (mean 18.82 mg/g). The adsorption capacity of C 7 H 8 was slightly low, ranging from 10.51-14.60 mg/g (mean 12.78 mg/g).

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Section: Microscopic Parameters Of Pores In Clay Mineralssupporting

confidence: 78%

Adsorption Properties of Hydrocarbons (n-Decane, Methyl Cyclohexane and Toluene) on Clay Minerals: An Experimental Study

Zhang

et al. 2017

Energies

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“…The surface areas were calculated using the BET method [26], considering the model of a multilayer coverage. The Br-Hec has a surface area of 385 m 2 g −1 , while the I-Hec gives the area of 363 m 2 g −1 , which are higher than those described in the literature for synthetic hectorites (5 to 300 m 2 g −1 ) [39], but similar to those reported for Laponite ® (between 279 and 375 m 2 g −1 ) [39,40].…”

Section: Porosity Packing and Thermal Stabilitysupporting

confidence: 75%

Synthesis and Features of Luminescent Bromo- and Iodohectorite Nanoclay Materials

et al. 2017

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Abstract:The smectites represent a versatile class of clay minerals with broad usage in industrial applications, e.g., cosmetics, drug delivery, bioimaging, etc. Synthetic hectorite Na 0.7 (Mg 5.5 Li 0.3 ) [Si 8 O 20 ](OH) 4 is a distinct material from this class due to its low-cost production method that allows to design its structure to match better the applications. In the current work, we have synthesized for the first time ever nanoclay materials based on the hectorite structure but with the hydroxyl groups (OH − ) replaced by Br − or I − , yielding bromohectorite (Br-Hec) and iodohectorite (I-Hec). It was aimed that these materials would be used as phosphors. Thus, OH − replacement was done to avoid luminescence quenching by multiphonon de-excitation. The crystal structure is similar to nanocrystalline fluorohectorite, having the d 001 spacing of 14.30 Å and 3 nm crystallite size along the 00l direction. The synthetic materials studied here show strong potential to act as host lattices for optically active species, possessing mesoporous structure with high specific surface area (385 and 363 m 2 g −1 for Br-Hec and I-Hec, respectively) and good thermal stability up to 800 • C. Both materials also present strong blue-green emission under UV radiation and short persistent luminescence (ca. 5 s). The luminescence features are attributed to Ti 3+ /Ti IV impurities acting as the emitting center in these materials.

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“…However, the SSA could assume very different values even among clays. The SSAs of different clays, reported by Dogan et al (2007), ranged from\1 to[100 m 2 /g, depending on the mineral structure. The highest values of [100 m 2 /g were found for synthetic clays, while the usual values for natural montmorillonite and illite were 39.5-65.4 and 17.7-20.4 m 2 /g, respectively.…”

Section: Physico-chemical Characteristics Of the Morinje Bay Peloidsmentioning

confidence: 99%

Physico-chemical characteristics of the peloid mud from Morinje Bay (eastern Adriatic coast, Croatia): suitability for use in balneotherapy

Mihelčić

Kniewald

Ivanišević

et al. 2011

Environ Geochem Health

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The study conducted in the Morinje Bay (Central Dalmatia, Croatia) included the investigation of the sedimentological, physico-chemical and geochemical properties of the Morinje Bay sediments in order to assess the suitability of the material for wellness-related purposes including medicinal use. The sedimentological characteristics of the Morinje mud are in accordance with the geological origin of the material; the sediment is fine grained, composed mostly of carbonates, quartz and clay minerals. The composition of the sediment determines the physico-chemical properties of the mud. The high content of carbonate minerals diminishes adsorbing the characteristics of the mud to some extent; however, they are still comparable to some commercial mud already successfully used for medicinal purposes. Geochemical analyses have shown that trace metals concentrations in the Morinje Bay samples were mostly in the range with similar material from unpolluted Adriatic environments. Only the concentrations of Cu, Pb, Zn and As were slightly higher than in the reference material, but still within acceptable limits.

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Baseline studies of the clay minerals society special clays: Specific surface area by the Brunauer Emmett Teller (BET) method

Cited by 64 publications

References 38 publications

Adsorption Properties of Hydrocarbons (n-Decane, Methyl Cyclohexane and Toluene) on Clay Minerals: An Experimental Study

Adsorption Properties of Hydrocarbons (n-Decane, Methyl Cyclohexane and Toluene) on Clay Minerals: An Experimental Study

Synthesis and Features of Luminescent Bromo- and Iodohectorite Nanoclay Materials

Physico-chemical characteristics of the peloid mud from Morinje Bay (eastern Adriatic coast, Croatia): suitability for use in balneotherapy

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