Pyrolysis of atmospheric residue of petroleum (ATR) using AlSBA-15 mesoporous material by TG and Py-GC/MS

Castro, Késia Kelly Vieira de; Figueiredo, Aneliése Lunguinho; Gondim, Amanda Duarte; Coriolano, Ana C. F.; Alves, Ana Paula M.; Fernandes, Valter J.; Araújo, Antônio S.

doi:10.1007/s10973-014-3757-8

Cited by 21 publications

(7 citation statements)

References 17 publications

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“…When the silicon atom is replaced by a metal (M) in the +2 oxidation state (e.g. Ni, or other transition metals), in a same reticular position with the same kind of bonding with oxygen atoms, two negative charges are generated in the SBA‐15 structure containing the incorporated metal (MSBA‐15) 74 (Figure 4 (b)], which has ion‐exchange characteristics 75, besides acquire skills of coordinating.…”

Section: Resultsmentioning

confidence: 99%

Chemical Regulation of Carbon Quantum Dots from Synthesis to Photocatalytic Activity

Tian

et al. 2013

Chemistry An Asian Journal

166

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Carbon quantum dots (CQDs) were synthesized by heating various carbon sources in HNO3 solution at reflux, and the effects of HNO3 concentration on the size of the CQDs were investigated. Furthermore, the oxygen-containing surface groups of as-prepared CQDs were selectively reduced by NaBH4 , leading to new surface states. The experimental results show that the sizes of CQDs can be tuned by HNO3 concentration and then influence their photoluminescent behaviors; the photoluminescent properties are related to both the size and surface state of the CQDs, but the photocatalytic activities are determined by surface states alone. The different oxygen-containing groups on the surface of the CQDs can induce different degrees of the band bending upward, which determine the separation and combination of the electron-hole pairs. The high upward band bending, which is induced by C=O and COOH groups, facilitates separation of the electron-hole pairs and then enhances high photocatalytic activity. In contrast, the low upward band bending induced by C-OH groups hardly prevents the electron-hole pairs from surface recombination and then exhibits strong photoluminescence. Therefore, both the photocatalytic activities and optical properties of CQDs can be tuned by their surface states.

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Section: Resultsmentioning

confidence: 99%

Chemical Regulation of Carbon Quantum Dots from Synthesis to Photocatalytic Activity

Tian

et al. 2013

Chemistry An Asian Journal

166

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“…Substituting the value of gas constant (R) in the equation, the activation energy was determined: Thus, it is possible to calculate the thermal degradation activation energy, in kJ/mol, of the residue of the distillation for flexible fuel samples obtained from the slope of the curve of the logarithms of the heating rate as a function of reciprocal of the absolute temperature, as shown in the Figure 5. This TG kinetic method has been applied for determination of activation energies for degradation and pyrolysis of petroleum and residues (Silva et al, 2011;Castro et al, 2014;Coriolano et al, 2013). The activation energies obtained for the degradation process of the residues from distillation of the flex-fuels are given in the Table 3.…”

Section: Resultsmentioning

confidence: 99%

Kinetic Study on Decomposition of the Residue Obtained From Distillation of Gasoline Mixed With Ethanol for Flex-Fuel Technology in Brazil

Coriolano

Inagaki

Delgado

et al. 2015

BJPG

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This work is a kinetic study of the degradation of the final residue obtained from distillation of gasoline mixed with hydrated ethanol. To obtain a flex-fuel, gasoline was mixed with distinct fractions of 20; 40; 60; and 80% volume of ethanol, and the samples were named as: G80:A20; G60:A40; G40:A60; and G20:A80, respectively. The samples were characterized by distillation, specific mass, density, pH, and conductivity. The distillation was carried out according the ASTM D86. At the end of the distillation, the residues of the samples were recovered and subsequently analyzed by thermogravimetry with the temperature ranging from 30 to 400 °C, at heating rates of 5; 10; and 20 °C min-1 , under synthetic air atmosphere. From TG and DTG curves, it was verified that the total decomposition of the residues occurred in the range of 80-180 °C. The maximum temperature for thermal degradation of the samples increased with the concentration of ethanol in the mixtures. Applying the Ozawa-Flynn-Wall kinetic model, samples with high concentration of alcohol presented high activation energy for the thermal degradation of the distillation residue. With values ranging from 140 to 173 kJ mol-1 , the abovementioned samples proved to be steadier, if compared to the ones with an excessive use of oxygenated solvents to the gasoline.

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“…These procedures were accomplished by thermogravimetric analysis on a Shimadzu thermobalance, DTG-60 model. The kinetic study of the ATR degradation was carried out at heating rates of 5, 10, and 20°C min -1 and it was determined the activation energy relative to thermal and catalytic pyrolysis of ATR using the Ozawa-FlynnWall models, as reported by Castro et al (2014).…”

Section: Methodsmentioning

confidence: 99%

“…Some studies show that adding aluminum structure of SBA-15 makes the catalytically active material in cracking reactions, isomerization, and hydrocracking (Liepold et al, 1996). Coriolano et al (2013) and Castro et al (2014) conducted research in order to check the catalytic activity of two mesoporous materials (AlMCM-41 and AlSBA-15) using the thermogravimetry for processing of waste oil, obtaining satisfactory results. This study aimed to synthesize mesoporous molecular sieves SBA-15 and AlSBA-15 with different Si/Al ratios, for use as catalysts in pyrolysis of atmospheric residue of petroleum (RAT), in order to obtain value-added light hydrocarbon products to the market, such as gasoline and diesel oil.…”

Section: Introductionmentioning

confidence: 99%

Catalytic processing of atmospheric residue of petroleum over AlSBA-15 nanomaterials with different acidity

Coriolano

Barbosa

Alberto

et al. 2016

Petroleum Science and Technology

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2016) Catalytic processing of atmospheric residue of petroleum over AlSBA-15 nanomaterials with different acidity, Petroleum Science and Technology, 34:7, 627-632, KEYWORDS Atmospheric residue of petroleum; AlSBA-; pyrolysis; acidity; aluminosilicate catalyst ABSTRACTThe AlSBA-15 nanomaterials with different Si/Al ratios were investigated as a promising material for processing of atmospheric residue of petroleum (ATR). The processing was performed in a thermobalance using nitrogen as a carrier gas at different heating hates. The catalytic pyrolysis was performed with ATR sample containing 20% mass of AlSBA-15. Based on TG data by applying Ozawa-Flynn-Wall kinetic model, the activation energy for the pyrolysis of ATR was higher than for the ATR/AlSBA-15, throughout all range of decomposition, indicating that the nanostructured material is a promising material for processing petroleum residues in order to obtain liquid products in the gasoline and diesel range.

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Pyrolysis of atmospheric residue of petroleum (ATR) using AlSBA-15 mesoporous material by TG and Py-GC/MS

Cited by 21 publications

References 17 publications

Chemical Regulation of Carbon Quantum Dots from Synthesis to Photocatalytic Activity

Chemical Regulation of Carbon Quantum Dots from Synthesis to Photocatalytic Activity

Kinetic Study on Decomposition of the Residue Obtained From Distillation of Gasoline Mixed With Ethanol for Flex-Fuel Technology in Brazil

Catalytic processing of atmospheric residue of petroleum over AlSBA-15 nanomaterials with different acidity

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