Bentonite modification with pillarization method using metal stannum

Widjaya, Robert Ronal; Juwono, Ariadne L.; Rinaldi, Nino

doi:10.1063/1.5011867

Cited by 9 publications

(9 citation statements)

References 15 publications

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“…which is the denomination given to the class of clays composed by a mixture of different clay minerals, with a major composition of montmorillonite [36]. It is possible to observe that the signal for SiO2 and metal oxides such as aluminum oxide and iron (III) oxide decreased in the diffractogram obtained with KO-A when compared to that of KO-N.…”

Section: Textural Propertiesmentioning

confidence: 98%

“…Even knowing that the natural clays present not only montmorillonite in its crystal composition, the intensities of the peaks in the positions referred to this mineral are higher than the intensities assigned to the other phases, suggesting that the clays are mainly composed by montmorillonite. Therefore, both natural clays can be classified as bentonite, which is the denomination given to the class of clays composed by a mixture of different clay minerals, with a major composition of montmorillonite [36]. It is possible to observe that the signal for SiO 2 and metal oxides such as aluminum oxide and iron (III) oxide decreased in the diffractogram obtained with KO-A when compared to that of KO-N.…”

Section: Textural Propertiesmentioning

confidence: 99%

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Wet Peroxide Oxidation of Paracetamol Using Acid Activated and Fe/Co-Pillared Clay Catalysts Prepared from Natural Clays

et al. 2019

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Many pharmaceuticals have been recently identified at trace levels worldwide in the aquatic environment. Among them, the highly consumed paracetamol (PCM), an analgesic and antipyretic drug, is largely being accumulated in the aquatic environment due to inefficient removal by conventional sewage treatment plants. This work deals with the treatment of PCM, used as a model pharmaceutical contaminant of emerging concern, by catalytic wet peroxide oxidation using clay-based materials as catalysts. The catalysts were prepared from natural clays, extracted from four different deposits using acid-activated treatment, calcination, and pillarization with Fe and Co. Pillared clays show the highest catalytic activity owing to the presence of metals, allowing to remove completely the PCM after 6 h under the following operating conditions: CPCM = 100 mg L−1, CH2O2 = 472 mg L−1, Ccat = 2.5 g L−1, initial pH = 3.5 and T = 80 °C. The prepared materials presented high stability since leached iron was measured at the end of reaction and found to be lower than 0.1 mg L−1.

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Section: Textural Propertiesmentioning

confidence: 98%

Section: Textural Propertiesmentioning

confidence: 99%

Wet Peroxide Oxidation of Paracetamol Using Acid Activated and Fe/Co-Pillared Clay Catalysts Prepared from Natural Clays

et al. 2019

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“…Exchangeable cations within gap between layers can be replaced by larger cations to make the bentonite structure more open, this procedure known as pillarization which has additional purposes i.e. increase strength of the layered structure when it use in elevated temperature (Widjaya, Juwono, & Rinaldi, 2017).…”

Section: Introductionmentioning

confidence: 99%

Cr/Al Pillared Bentonite and Its Application on Congo Red and Direct Blue Removal

Said

Dian

Mohadi

et al. 2020

Molekul

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Bentonite was modified through pillarization with metal oxide Cr/Al in 2:1 and 1:2 ratio to obtain larger basal spacing of bentonite-layered structure. Pillarization was conducted via intercalation method at room temperature followed by calcination. The result was characterized by using XRD and FT-IR Spectrophotometer. XRD pattern shown pillarization by Cr/Al 2:1 ratio gave peak at 2θ 5.3° which is correspond to d = 16.4 Å. At 1:2 Cr/Al ratio, peak appears at 2θ 6.4° that is related to d = 13.7 Å. FTIR Spectroscopy measurement gave inconclusive result. The Cr/Al pillared bentonite at 2:1 ratio was applied as adsorbent on Congo red and Direct blue dyes. The result indicates the adsorption follows Freundlich isotherm. Adsorption rate for both dyes follows pseudo-second order with rate constant of pillared bentonite higher than natural one. Adsorption isotherm concludes that Freundlich isotherm is favorable compare to Langmuir. Thermodynamic evaluation suggests that isotherm occurs spontaneously in an exothermic process.

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“…Tin oxide-Pillared Clays (Tin PILCs) can also be used as adsorbents for adsorption reactions in the pharmaceutical field for absorbing trimethoprim and sulfamethoxazole in wastewater from the pharmaceutical industry. Tin PILCs have a large pore character and also a large pore volume and evenly on the surface of organoclay so that Tin PILCs able to become adsorbent [9][10] . Chromium compounds are strong oxides at low-pH, so chromium has a fairly good acidity as an acid catalyst.…”

Section: Introductionmentioning

confidence: 99%

Development Tin-Chromium Pillared in Bentonite as Catalyst for Ethanol to Gasoline Conversion

Widjaya

Juwono²,

Rinaldi³

2019

AJAS

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Bentonite is a natural material that can used as a buffer catalysts and easy to modified. Tin and Chromium metals can used as catalyst material. Tin and Chromium metals supported into bentonite was successfully prepared by pillarization method, and was calling Bi-Oxides pillared clays. It has used to catalyst for ethanol to gasoline conversion. Basal spacing for bentonite and Sn-Cr/bentonite were 12,83Çº and 25,67Çº respectively. Specific surface area and pore volume of Sn-Cr/bentonite was investigated and appeared be bigger than bentonite. The results confirmed by BET analysis that were 30,35 m2/g become 168,86 m2/g and pore volume from 0,0065cm3/g become 0,03 cm3/g. The thermal stability was determined by Thermogravimetry Analysis from temperature 0ÂºC until 1000ÂºC and the functional group changes detected by Fourier Transform Infra Red. XRF and EDX detected the Sn-Cr metals in the bentonite. The results of the liquid catalyst test analyzed by GC-MS and showed the contents consisted of benzene, toluene, octane, and naphthalene, that were similar with commercial gasoline. So, the Sn and Cr were using as metal pillars for bentonite interlayer and successfully used this Bi-oxides pillared clays for ethanol to gasoline conversion.Â Keywordsâ€” Bi-Oxides, Pillared clays, Sn-Cr/Bentonite, Ethanol to Gasoline.

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Bentonite modification with pillarization method using metal stannum

Cited by 9 publications

References 15 publications

Wet Peroxide Oxidation of Paracetamol Using Acid Activated and Fe/Co-Pillared Clay Catalysts Prepared from Natural Clays

Wet Peroxide Oxidation of Paracetamol Using Acid Activated and Fe/Co-Pillared Clay Catalysts Prepared from Natural Clays

Cr/Al Pillared Bentonite and Its Application on Congo Red and Direct Blue Removal

Development Tin-Chromium Pillared in Bentonite as Catalyst for Ethanol to Gasoline Conversion

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