Thermal and catalytic pyrolysis of vacuum gas oil using HZSM-5: TG and PY-CG/MS study

Araújo, Aruzza Mabel de Morais; Figueiredo, Aneliése Lunguinho; Gondim, Amanda Duarte; Guedes, Ana Paula de Melo Alves; Souza, Luíz Di; Araújo, Antônio S.

doi:10.1080/10916466.2015.1136947

Cited by 2 publications

(5 citation statements)

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“…The similarity between the crystalline structures of the HZSM5 zeolites, synthesized in the absence of organic template, with the standard ZSM-5 demonstrates the efficiency of the synthesis methods applied. These are also in accordance with the diffractograms presented in the literature [26,27,31,32].…”

Section: Introductionsupporting

confidence: 79%

“…The internal flexions of the tetrahedrons correspond to the band seen at 457 cm −1 , and the band referring to the length 545 cm −1 defines the presence of five-membered double rings pertaining to the three-dimensional porous structure of ZSM-5, as reported in the literature [26,37,38].…”

Section: -420mentioning

confidence: 99%

“…Microporous zeolites such as HY, HBeta and HZSM-5 have been studied for the cracking of several compounds for many decades because of their attributes, such as high acidity and good thermal stability [26,44]. However, due to their small pore openings, bulky molecules, such as triglycerides, face a more difficult time to enter, adding a disadvantage to their use.…”

Section: Catalytic Testmentioning

confidence: 99%

“…The TG/DTG curves of the ALMCM and HZSM5 samples were obtained in the range of 30 to 900 • C, as shown in Figure 6 for the mesoporous and microporous materials. The similarities between the values of the physical properties of the samples prove the efficiency of the synthesis methods for both the ALMCM and the HZSM5 [21,26,40,41]. The acidity of the ALMCM and HZSM5 samples was determined by the thermal desorption method (n-butylamine), in order to quantify the density and strength of the acid sites.…”

Section: Flexion (T-o T = Si or Al) 788mentioning

confidence: 99%

“…The ZSM-5 zeolite was synthesized by the hydrothermal method in the absence of an organic template, as performed by Araújo et al [26]. The following reagents were used as precursor materials: silica gel (SiO 2 , Acros Organics, Morris Plains, NJ, USA), Sodium hydroxide (NaOH, Merck, Darmastadt, Hessen, Germany), sodium aluminate (NaAlO 2 , Sigma-Aldrich, St. Louis, MO, USA) and distilled water as solvent.…”

Section: Synthesis Of the Catalysts (Al-mcm-41 And Zsm-5)mentioning

confidence: 99%

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Fast Pyrolysis of Sunflower Oil in the Presence of Microporous and Mesoporous Materials for Production of Bio-Oil

et al. 2018

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Abstract:The present work describes the study of micro (H-ZSM-5) and mesoporous structures, aiming at their application in the production of renewable fuels through the thermos-catalytic pyrolysis process both were synthesized hydrothermally and characterized by X-ray diffraction, thermal analysis, infrared spectroscopy, nitrogen adsorption, and surface acidity. The catalytic effect of the materials mentioned, as well as their mechanical mixtures in the proportions of H-ZSM-5 (75% wt) and AL-MCM-41 (25% wt); H-ZSM-5 (50% wt) and AL-MCM-41 (50% wt); H-ZSM-5 (25% wt) and AL-MCM-41 (75% wt) were used in the thermal and thermo-catalytic pyrolysis of sunflower oil. The products obtained in the presence of H-ZSM-5 (25% wt) and AL-MCM-41(75% wt) showed selectivity for the conversion of hydrocarbons between C11 and C16, which is near that of the petroleum-derived kerosene and diesel (>C16). On the other hand, the H-ZSM-5 (75% wt) and AL-MCM-41 (25% wt) material, in which the majoritarian catalyst is the microporous, with active sites and a higher surface acidity, indicates selectivity for light hydrocarbons (C5-C10), in the range of gasoline obtained by the conversion of mineral oil. The presence of catalysts (AL-MCM-41and H-ZSM-5) favors the deoxygenation of the pyrolysis products of sunflower oil by decarbonylation reaction.

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Section: Introductionsupporting

confidence: 79%

Section: -420mentioning

confidence: 99%

Section: Catalytic Testmentioning

confidence: 99%