Study of Si Surface Adsorption Towards Hydrogen Molecule

Dhaneswara, Donanta; Fatriansyah, Jaka Fajar; Yusuf, Mukramah; Abdurrahman, Muhammad Hanif; Kuskendrianto, Falah Riski

doi:10.1088/1757-899x/547/1/012038

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…Silica is a basic raw material that is widely used in semiconductors, ceramics, polymers, and several industries, such as the rubber industry and pharmaceuticals (Fernandes et al, 2016). In particular, silica can be used for gas adsorption (Dhaneswara et al, 2019 and heavy metal remediation in water (Dhaneswara et al, 2018). In mesoporous form, silica can be used too in gas adsorption application Nofrijon, 2016, Wilson andMahmud, 2015).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Amorphous Silica from Rice Husk Ash: Comparing HCl and CH3COOH Acidification Methods and Various Alkaline Concentrations

Dhaneswara¹,

Fatriansyah²,

Situmorang³

et al. 2020

IJTech

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High purity silica has been successfully synthesized from rice husk ash (RHA) by alkaline extraction using the reflux process followed by acidification. For this study, rice husk was burned in an electric furnace at 700°C for 5 hours to produce RHA. The RHA was refluxed using sodium hydroxide with concentrations of 1.25×10-3 M (equal to 5% NaOH) and 2.5×10-3 M (equal to 10% NaOH). The acidification process was performed using hydrochloric acid (HCl) 1 M and acetic acid (CH3COOH) 1M to produce silica gel. Then, the silica gel was heated to 120°C for 12 hours to produced silica. The characterization of silica was determined using energy-dispersive X-ray analysis, Fourier-transform infrared spectrometry, the Brunauer-Emmet-Teller method, and X-ray diffraction. The results show HCl acidification produced silica of a higher purity than that produced by CH3COOH acidification. The higher concentration of sodium hydroxide led to higher purity of silica. Based on X-ray diffraction, the silica extracted from RHA was found to be amorphous, and Fourier-transform infrared spectrometry revealed bending and stretching vibrations of Si-O and Si-O-Si. The silica extracted by HCl acidification had a surface area of 236 m 2 /g, a total pore volume of 0.54 cc/g, and an average pore diameter of 9 nm. The silica extracted by CH3COOH acidification had a surface area of 204 m 2 /g, a total pore volume of 0.43 cc/g, and an average pore diameter of 8.4 nm.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Amorphous Silica from Rice Husk Ash: Comparing HCl and CH3COOH Acidification Methods and Various Alkaline Concentrations

Dhaneswara¹,

Fatriansyah²,

Situmorang³

et al. 2020

IJTech

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show abstract

“…Silica is a basic raw material widely used in semiconductors, ceramics, polymers and several industries, such as the rubber industry and the pharmaceutical industry (Fernandes et al, 2016). Silica can notably be used for the adsorption of gases (Dhaneswara et al, 2019 and the remediation of heavy metals in water (Dhaneswara et al, 2018). In mesoporous form, silica can also be used in gas adsorption applications (Wilson and Mahmud, 2015).…”

Section: Introductionmentioning

confidence: 99%

Transesterification of biodiesel from kapok seed oil (ceiba pentandra) using a natural heterogeneous katalyst (rice husk activation)

Sri Yusmartini,

Fernianti

et al. 2023

IJAC

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Biodiesel as a renewable energy source can be produced by a chemical reaction between vegetable oil or animal fat and short-chain alcohol such as methanol, ethanol or buthanol and is supported by a catalyst. This process is called transesterification. From an environmental point of view, the use of biodiesel has several advantages such as reducing carbon dioxide emissions, being non-toxic and biodegradable. Kapok seed oil has potential for exploitation, particularly as a raw material for the manufacture of biofuel. Kapok seeds (Ceiba pentandra) have the potential to be used as a feedstock for biodiesel because their oil content is quite high, around 18-25% oil. The controlled combustion of rice husks produces ash containing high purity amorphous silica. Amorphous silica can be obtained from RHA (rice husk ash) when rice husk is burned at a temperature of 700°C, and it is transformed into crystalline silica when burned at a temperature above 850 °C. This silica has many applications as a filler, adsorbent, catalyst support, star gel component and source for the production of premium silicon and its compounds. The aim of the research is to determine the transisterification process of biodiesel from kapok (Ceiba pentandra) seed oil. using a natural heterogeneous catalyst in It is an activated rice husk. The method used was the preparation of kapok seed samples and the extraction of sokhlet. Determination of free fatty acids (FFA) in kapok seed oil, activation of rice husk, manufacturing of biodiesel from kapok seed with addition of rice husk H2SO4 as catalyst. The characteristics of the biodiesel produced are Density: 859.88572 kg/m3 (SNI: 7182:2015) = 850-890 kg/m3), Viscosity: 2.45824 cSt (SNI: 7182:2015) = 2.3 – 6, 0 cSt, Calorific value: 7,374.5322 cal/g (SNI: 7182; 2015) = 7,100 -11,000 cal/ g, Devil's number: 48 (ASTM: D6751) = 47. Meanwhile, GC-MS with the highest values at all reaction times, namely Hexadecanoic acid, methyl ester (C17H34O2), methyl tetradecanoate (C15H30O2) and 9 - Octadecenoic acid (Z), methyl ester (C19H36O2) . The functional group found in kapok seeds is –OH.

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Utilization of Cellulose Symbiotic Culture of Bacteria and Yeast (SCOBY) with Sweet Tea Media as Methylene Blue and Brilliant Green Biosorbent Material

2023

JMEF

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Study of Si Surface Adsorption Towards Hydrogen Molecule

Cited by 3 publications

References 8 publications

Synthesis of Amorphous Silica from Rice Husk Ash: Comparing HCl and CH3COOH Acidification Methods and Various Alkaline Concentrations

Synthesis of Amorphous Silica from Rice Husk Ash: Comparing HCl and CH3COOH Acidification Methods and Various Alkaline Concentrations

Transesterification of biodiesel from kapok seed oil (ceiba pentandra) using a natural heterogeneous katalyst (rice husk activation)

Utilization of Cellulose Symbiotic Culture of Bacteria and Yeast (SCOBY) with Sweet Tea Media as Methylene Blue and Brilliant Green Biosorbent Material

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