Innovative method for hydrocalumite-like compounds' preparation and their evaluation in the transesterification reaction

Sánchez‐Cantú, Manuel; Camargo-Martínez, Sebastian; Pérez-Díaz, Lydia M.; Hernández-Torres, M.E.; Rosas, E. Rubio; Valente, Jaime S.

doi:10.1016/j.clay.2015.07.004

Cited by 15 publications

(10 citation statements)

References 46 publications

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“…6b, a well-shaped layered structure with the lateral dimension of 100-200 nm can be observed. The morphology obtained by this method is similar to the other procedures that prepared through co-precipitation and hydrothermal methods (Sánchez-Cantú et al, 2015).…”

Section: Morphological Characterizationsupporting

confidence: 69%

Rapid preparation of nano hexagonal-shaped hydrocalumite via one-pot mechanochemistry method

Fahami

Beall

Enayatpour

et al. 2017

Applied Clay Science

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Hexagonal-shaped hydrocalumite (Ca-Al layered double hydroxides) was successfully synthesized by one-step mechanochemistry method within only 30 min. The product was characterized by X-ray diffraction, Fourier Transform Infrared spectroscopy, field emission scanning electron microscopy, energy dispersive spectroscopy, elemental mapping analysis, transmission electron microscopy, X-ray fluorescence, and thermogravimetric analysis. The results showed that the formation of a well-defined hydrocalumite and the microstructural evolution were strongly dependent on the milling time. From XRD profiles, a well-crystallized hydrocalumite with higher peaks intensity was formed after 60 min of milling, while the sharpness and intensity of LDH-derived XRD peaks decreased as milling time increased. Microscopic analysis showed that the product had hexagonal layered structure with lateral dimension of 100 to 200 nm. In addition, the thermal decomposition of the product is reported in details. This study offers a low-cost approach to synthesis of hydrocalumite owing to simplicity and extremely short processing time.

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Section: Morphological Characterizationsupporting

confidence: 69%

Rapid preparation of nano hexagonal-shaped hydrocalumite via one-pot mechanochemistry method

Fahami

Beall

Enayatpour

et al. 2017

Applied Clay Science

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“…The LDH phases have thus layered structures consisting of positively charged sheets due to the periodical stacking of Ca 2+ and Al 3+ ions and interlayer spaces [ 43 , 59 ]. The interlayer spaces could contain solvated anions or water molecules due to the charge imbalance between the sheets and interlayer spaces [ 60 ]. The intercalation of the anions or water molecules to the interlayers causes the electrically neutral state of the CaAl-LDH structures [ 20 ].…”

Section: Calcium Aluminate-layered Double Hydroxide Phasesmentioning

confidence: 99%

Chloride Removal of Calcium Aluminate-Layered Double Hydroxide Phases: A Review

Kim

Park

2021

IJERPH

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Chlorine is a critical element with respect to the use of fossil fuel, recycling of industrial wastes, and water purification. Chlorine could form toxic chemical compounds, corrode pipe systems and boilers, and contaminate surface and ground waters. Calcium aluminate-layered double hydroxides are one of the most promising materials to remove chlorides due to the chemisorption mechanism, since the phases have positively charged interlayers. Many studies on the synthesis and the characterization of calcium aluminate-layered double hydroxides have been extensively conducted, whereas few studies have been conducted on the chloride removal characteristics of the phases. The state-of-the-art studies on the synthesis methods and the structural characteristics of CaAl-LDH phases, the underlying mechanism on the removal of chlorides, and the potential removal rate and the capacity in the present study were thoroughly reviewed.

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“…Of all operating parameters, temperature is the most commonly fixed variable. Published studies on the catalyzed (trans)esterification often fixed reaction temperature at 60°C or 65°C as shown in Tables 2 and 3 23,78,145–148 . There are other studies that reported optimum temperatures from 50°C to 70°C 50,64,149 …”

Section: Factors Affecting Non‐catalytic and Heterogeneous Solid Catamentioning

confidence: 99%

“…ratio of 9:1, a reaction time of 22 min, and a temperature of 255°C 173 . In situ transesterification of Schizochytrium limacinum was conducted at 211.6°C for 120 min with a methanol‐to‐microalgae ratio of 75; a product yield of 58.4% was reported 145 . A more extensive review of the in situ (trans)esterification approach or strategy has been previously written by Go et al 9 …”

Section: Recent Trendsmentioning

confidence: 99%

Non‐catalytic and heterogeneous acid/base‐catalyzed biodiesel production: Recent and future developments

Tran‐Nguyen

Ong

et al. 2020

Asia-Pacific J Chem Eng

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Biodiesel production technologies, which are non-catalytic and those involving the use of heterogeneous catalyst(s), have gained much interest owing to its high biodiesel and pure glycerol throughput. During the past 15 years, many studies were devoted to explore new catalysts as well as improve non-catalytic technologies with aims to ultimately industrialize such biodiesel production processes. This review elucidates the main process parameters that influences non-catalytic and heterogeneous-catalyzed biodiesel production processes. The common parameters among these technologies include the process temperature, alcohol/oil molar ratio, pressure, catalyst loading, and feedstock quality.Optimization of these process parameters is discussed according to the use of conventional method (one factor at a time [OFAAT]) or the use of statistical methods such as response surface methodology (RSM), artificial neural network (ANN), and Taguchi method. In addition, recent development on noncatalytic process and those involving the use of heterogeneous catalyst(s), such as glycerol-free processes under supercritical conditions of alkyl donors and strategies to improve properties of heterogeneous catalyst, are also reviewed.Finally, insight based on the published techno-economical evaluations is also tackled, and future prospects and research directions on these technologies are also discussed.

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Innovative method for hydrocalumite-like compounds' preparation and their evaluation in the transesterification reaction

Cited by 15 publications

References 46 publications

Rapid preparation of nano hexagonal-shaped hydrocalumite via one-pot mechanochemistry method

Rapid preparation of nano hexagonal-shaped hydrocalumite via one-pot mechanochemistry method

Chloride Removal of Calcium Aluminate-Layered Double Hydroxide Phases: A Review

Non‐catalytic and heterogeneous acid/base‐catalyzed biodiesel production: Recent and future developments

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