Thermal behavior and immersion heats of selected clays from Turkey

Sakizci, Meryem; Alver, Burcu Erdoğan; Yörükoğullari, Ertuğrul

doi:10.1007/s10973-009-0294-y

Cited by 37 publications

(28 citation statements)

References 49 publications

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“…The clay samples were air-dried at room temperature and ground to pass through a < 100 µm sieve. Investigation of the raw clay samples in our laboratory using XRD, DTA and TG techniques has been reported in previous papers (Sakızcı et al 2009(Sakızcı et al , 2011.…”

Section: Materials and Chemicalsmentioning

confidence: 99%

“…After acid treatment, sepiolite remained the predominant phase but the intensity of the characteristic peak of dolomite (d = 2.90 Å) decreased considerably. The XRD pattern indicated that the K1 sample consisted of kaolinite with quartz as a major contaminant (Sakızcı et al 2009). Kaolinite and quartz peaks were always present after treatment with 1 M HCl (Figure 1).…”

Section: X-ray Analysismentioning

confidence: 99%

“…Kaolinite and quartz peaks were always present after treatment with 1 M HCl (Figure 1). Sample K2 consisted mainly of kaolinite with minor amounts of muscovite and quartz (Sakızcı et al 2009). There was no significant change in the XRD pattern of K2H after acid treatment ( Figure 1).…”

Section: X-ray Analysismentioning

confidence: 99%

“…The other minerals appeared to be hardly affected by acid treatment. In addition to containing montmorillonite and illite, sample B2 contained quartz, albite, cristobalite and dolomite (Sakızcı et al 2009). In particular, the intensity of the dolomite peak (d = 2.89 Å) decreased considerably with acid treatment (Figure 2).…”

Section: X-ray Analysismentioning

confidence: 99%

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Ethylene Adsorption on Acid-Treated Clay Minerals

Alver

Sakizci

2012

Adsorption Science & Technology

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ABSTRACT:The adsorption of ethylene (C 2 H 4 ) on five clay minerals (sepiolite, two kaolinites and two bentonites) and on forms treated with 1 M HCl solution (SH, K1H, K2H, B1H and B2H) was investigated. Adsorption isotherms for ethylene on all clay minerals were obtained at 4 °C and 20 °C up to 37 kPa. X-Ray diffraction (XRD), thermal analysis (TG/DTA) and N 2 adsorption analysis were used for structural and thermal characterization. It was found that the extent to which ethylene gas was adsorbed by natural and acid-treated sepiolites (0.424-0.859 mmol/g) was higher than that exhibited by natural and acid-treated bentonites (0.068-0.144 mmol/g) and by kaolinites (0.014 -0.061 mmol/g) at both temperatures. The uptake of ethylene on the acid-treated clays increased in the order K1H < K2H < B1H < B2H < SH.

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Section: Materials and Chemicalsmentioning

confidence: 99%

Section: X-ray Analysismentioning

confidence: 99%

Section: X-ray Analysismentioning

confidence: 99%

Section: X-ray Analysismentioning

confidence: 99%

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Ethylene Adsorption on Acid-Treated Clay Minerals

Alver

Sakizci

2012

Adsorption Science & Technology

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“…The most important group of clays minerals is the doublesheet phyllosilicate kaolinite. The kaolinite (hydrated aluminosilicate, Al 2 Si 2 O 5 (OH) 4 ) is composed by stacked sheets of tetrahedral silica layer [Si 2 O 5 ] 2-and an alumina octahedral layer [Al 2 (OH) 4 ] 2+ [9]. The heat treatment at high temperatures of kaolinite-clays leads to the formation [10].…”

Section: Introductionmentioning

confidence: 99%

Elaboration and characterization of mullite-anorthite-albite porous ceramics prepared from Algerian kaolin

2018

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Mullite-anorthite-albite porous ceramic materials were successfully prepared by a solid-state reaction between kaolin clay and two different additives (CaCO 3 and Na 2 CO 3 ). The starting raw material was characterized by X-ray fluorescence, X-ray diffraction (XRD) and dynamic light scattering techniques. The effect of CaCO 3 and Na 2 CO 3 concentration (10 to 70 wt%) on structure, morphology and thermal properties of the obtained ceramics was investigated by XRD, scanning electron microscopy and differential scanning calorimetry (DSC) techniques. The XRD patterns showed that mullite (3Al 2 O 3 .2SiO 2 ), anorthite (CaO.Al 2 O 3 .2SiO 2 ) and albite (Na 2 O.Al 2 O 3 .6SiO 2 ) were the main crystalline phases present in the materials. The morphology investigation revealed the porous texture of obtained ceramics characterized by the presence of sponge-like structure mainly due to the additive decomposition at high temperatures. The DSC results confirm the presence of four temperature regions related to the kaolin thermal transformations and the formation of minerals. The temperature and enthalpy of mineral formation are additive concentration dependent. As a result, the optimal content of additives which allowed the coexistence of the three phases, a spongelike morphology, and high porosity without cracks corresponded to 15 wt% CaCO 3 , 15 wt% Na 2 CO 3 , and 70 wt% kaolin.

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A simple and economical fire test setup for examining the fire retardancy/extinguishing ability of water additive fire‐retardant materials on class A fires

Bokka,

Ameta,

Achary

et al. 2023

Fire and Materials

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A portable lab scale test setup (1 × 1 × 0.72 m3) with apparatus and procedure has been illustrated to test the fire extinguishability of fire retardant materials (FRMs) as water additives on class A fires. The main objective was to use selected commercial, eco‐friendly FRM powders such as hydroxides, carbonates, and clays as water additive‐based fire extinguishing agents for suppressing solid fires. FRM powders, namely, Mg(OH)2, Ca(OH)2, CaCO3, and MMT‐Clay were added to water and were mist sprayed on a wooden fire (class A) to test their fire‐suppressing ability. A comparison involving tests with only water (without any additives) was also recorded. The solutions made with FRM additives in water showed promising results in suppressing the fire in comparison to systems with only water as an extinguishing agent. Heat sink materials, such as hydroxides and clays depicted commendable performances in retarding the burning process and almost doubled the capability of fire suppression with low loading. Their heat‐absorbing nature resisted the increase in temperature and slowed down the burning process causing an increase in the total burning time of the crib and avoiding reignition. Whereas, carbonates (CaCO3) showed a faster flame out by the release of CO2 gas, which diluted the oxygen content in the surroundings. The article concludes with a discussion of the requirements for the ideal water mist additive‐based fire extinguishing agent and a recommendation that future work include validation of the laboratory‐scale method based on a comparison with full‐scale suppression data for the same additives.

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Thermal behavior and immersion heats of selected clays from Turkey

Cited by 37 publications

References 49 publications

Ethylene Adsorption on Acid-Treated Clay Minerals

Ethylene Adsorption on Acid-Treated Clay Minerals

Elaboration and characterization of mullite-anorthite-albite porous ceramics prepared from Algerian kaolin

A simple and economical fire test setup for examining the fire retardancy/extinguishing ability of water additive fire‐retardant materials on class A fires

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